ITB - Procurement of Air Quality Management System for Installation in Timor Leste

New clarification added: QUESTION3. In the Services, under Section 4.2.Maintenance of the reference instrument, regarding Clauses 10-12: We kindly request clarification regarding the reliability and uptime metrics outlined in the service requirements, specifically the MTBF, MTTR, and uptime percentage targets for system components.Could you please confirm the following:1. Are bidders expected to provide documentation during the proposal phase demonstrating that the proposed equipment meets the specified Mean Time Between Failure (MTBF) and other reliability metrics?2. Are there ongoing monitoring and reporting requirements post-installation for MTBF, MTTR, and uptime (e.g., monthly logs or performance summaries)? If so, could you please specify the expected format and reporting frequency?3. Is there a preferred or required method for tracking and logging uptime and maintenance activities (e.g., digital logs, automated dashboards, manual reports)?We appreciate your clarification so we can ensure full alignment with project expectations.ANSWER1. Documentation of Reliability Metrics During Proposal PhaseYes, bidders are expected to demonstrate that the proposed reference-grade monitoring equipment meets industry-standard reliability benchmarks, including MTBF, MTTR, and uptime percentages. This can be done through:Manufacturer technical datasheets.Reliability test reports or certifications.Documented field performance from similar deployments.This information will support the technical evaluation process and ensure compliance with operational reliability expectations.2. Post-Installation Monitoring and Reporting RequirementsYes, following installation, ongoing monitoring and reporting of reliability metrics is required as part of the maintenance services. Specifically:Monthly or quarterly performance summaries must be submitted, detailing:Uptime (percentage based on hours of expected vs. actual operation),Any downtime events and their durations,MTTR calculations (based on response and resolution logs),Preventive and corrective maintenance activities performed.The reporting frequency (typically monthly) and structure will be finalized in consultation with UNOPS at project initiation but should be designed to ensure traceability and accountability.3. Preferred Methods for Tracking and LoggingWhile there is flexibility, a digital tracking approach is strongly preferred to ensure accuracy, auditability, and timely reporting. Acceptable methods include:Automated dashboards or cloud-based platforms with uptime tracking.Digital maintenance logs exported from device software or integrated fleet monitoring systems. 

New clarification added: QUESTION2. ‎In the Services, under Section 2. Design of Supporting Civil Works:(this point was very vaguely addressed in one of the Q&A's. The UNOPS response mentioned something about the Supplier not being responsible, but it would be good to get solid clarity on this point.)In the section titled "Design of Supporting Civil Works," the requirements for civil/structural design development and approval are clearly outlined. However, the documentation does not specify who is responsible for performing the actual construction and installation of the civil works (e.g., foundations, mounting structures, protective measures).Could you kindly confirm:1. "Is the bidder responsible for executing the civil works (in addition to the design)?"2. "If not, will UNOPS or another designated contractor implement the construction based on the approved design package?"Your clarification will help ensure an accurate understanding of project scope and resource planningANSWER1. Responsibility for Execution of Civil Works:Yes, the bidder (Supplier) is responsible for both the design and execution of the civil works necessary to support the installation and secure operation of the air quality monitoring equipment (both reference-grade instruments and low-cost sensors).This includes, but is not limited to:Construction of foundations or mounting bases, as required by site conditions.Installation of support poles or structural brackets.Provision of protective enclosures, cable conduits, and drainage as needed.Ensuring site safety, quality, and environmental compliance during works execution.The Supplier is expected to deliver a complete and operational installation, including any infrastructure necessary to safely and securely mount and operate the equipment in line with the approved design.2. Role of UNOPS:UNOPS will:Review and approve the proposed civil works designs prior to implementation.Conduct oversight to ensure quality, compliance with HSSE (Health, Safety, Social and Environmental) requirements, and alignment with local codes and UNOPS standards.Provide coordination support if needed, particularly for site access arrangements or coordination with local stakeholders.UNOPS will not implement the civil works on the Supplier’s behalf, nor will another contractor be assigned for this purpose. The responsibility for implementation lies entirely with the selected Supplier.We trust this provides the necessary clarity for your resource planning and bid preparation.

New clarification added: QUESTION1. ‎In the Goods table, under Low-Cost Sensors, Clause 5:We would like to request clarification regarding the environmental durability specifications outlined for the low-cost PM2.5 monitoring equipment, specifically the requirement for an IP66 or higher enclosure rating.Given that this portion of the project pertains to low-cost sensors typically designed for ambient PM2.5 measurement, we seek to understand the intent behind the IP66 specification, which indicates protection against powerful water jets and complete dust ingress protection. This level of environmental sealing is uncommon for many commercially available low-cost PM2.5 monitors, which are typically housed in weather-resistant, ventilated enclosures to allow for adequate air sampling.Could you please confirm:1. Whether the IP66 requirement applies specifically to the enclosure housing the electronics and communication components, or if it is intended to apply to the entire sensor unit including the air sampling inlet?2. Whether alternate designs that allow for sufficient air intake while still providing protection against environmental conditions (e.g., IP-rated electronics enclosure with a ventilated weather hood) would be considered acceptable?3. Whether there is flexibility in the IP rating requirement for this equipment category, provided the monitors are proven to operate reliably within the specified temperature, humidity, and wind conditions?ANSWER1. Scope of IP66 Requirement:The IP66 rating applies primarily to the enclosure housing the sensor's electronics and communication components. The aim is to ensure robust protection against high humidity, dust ingress, and saline environments, particularly in coastal or maritime-influenced areas where corrosion and condensation pose increased risks.The air inlet or air sampling pathway does not need to be sealed to IP66, as proper particulate matter measurement requires airflow. However, the design must prevent water ingress, salt spray exposure to internal electronics, and particle build-up, which could compromise sensor integrity or data quality.2. Alternative Designs:Yes, alternate configurations will be considered, provided they:Ensure effective protection of sensitive components from rain, wind-driven dust, and salt-laden air, especially in coastal deployments.Combine ventilated weatherproof housings or shields with internal IP-rated compartments for electronics.Provide documentation demonstrating the design's durability in harsh outdoor conditions, including coastal or tropical environments.Proposals integrating a weather-hooded inlet with corrosion-resistant materials, or filters to prevent salt and fine particles from reaching internal components, are welcomed.3. Flexibility in IP Rating:While IP66 is the reference standard, there is limited flexibility in the IP rating provided that the sensor system:Can operate reliably in coastal outdoor environments.Meets the specified temperature (-10°C to 55°C), humidity (up to 100% RH), and wind exposure ranges.Is validated through field deployment data or certifications indicating resilience in high-salinity and high-humidity environments.The objective is to ensure long-term data reliability and minimal corrosion or failure in challenging environmental conditions, not to exclude functional low-cost designs that meet these goals through alternative methods.We therefore strongly encourage bidders to propose models with proven durability in marine or coastal settings, and clearly indicate how the proposed design addresses the challenges of salt air, high humidity, and dust exposure.

New clarification added: QUESTION4. What is the Term of Payment for this project?Thank youANSWERUNOPS Standard payment terms is 30 days after invoice date.For the overall project, UNOPS will agree with the selected contractor on the payment milestones during contracting stage. 

New clarification added: QUESTION3. For the modem connection during operational. The data connection will be needed. Is it bidder's responsibility during 2 years warranty?ANSWERData Connectivity – Supplier's Responsibility During WarrantyAs per the expected operational requirements and standard practices:Yes, it is the responsibility of the Supplier (bidder) to ensure that real-time data transmission is functional during the full 2-year warranty period, including:Provision of compatible modems or integrated connectivity devices.Activation and ongoing payment for data SIM cards or equivalent data packages necessary to maintain uninterrupted transmission of data to the designated server or platform.Ensuring secure, stable, and encrypted data transfer where applicable.This provision falls under the Supplier’s obligations to guarantee operational functionality and reliability of the system throughout the warranty period. This includes:Hardware (modem, cabling, connections),Software/firmware updates, andData communication service continuity.Maintenance of connectivity, regular troubleshooting, and any associated software/firmware updates required to support stable communication.UNOPS/Client RoleUNOPS and the Client will:Ensure that the backend systems (e.g., servers or cloud data platforms) are ready to receive and process the data.Provide access or credentials to relevant platforms if needed.Support integration with national monitoring networks hosted within the information system managed by DNMG.RecommendationIt is recommended that bidders:Include the cost of data subscriptions for the full 2 years within their financial proposal.Clearly specify the monthly data volume estimated per sensor and the telecom provider/network compatibility. Sustainability and Transition to Government OwnershipIn line with best practices and long-term sustainability goals:It is strongly recommended that the Supplier uses SIM cards from local telecom network providers operating in the respective country of deployment.This will facilitate smooth handover and ease of continuation of the service once the Government or national agency assumes ownership and network maintenance responsibilities beyond the warranty period.Choosing widely available, cost-effective, and locally supported network options will minimize transition costs and technical complexity in the post-project phase.3. Role of UNOPS and Government PartnersUNOPS and UNEP will ensure server-side readiness and integration into national monitoring platforms hosted by DNMG.The national agencies will be supported during the transition phase to build the technical capacity to manage, retrieve, and interpret data from the installed infrastructure.Please include the estimated data requirements and proposed telecom providers in your technical and financial offer to demonstrate alignment with these sustainability objectives. 

New clarification added: QUESTION2. Whose responsibility to provide land clearing for installation, land permit and others permit document? Is it bidder's responsibility?ANSWERBased on the project specifications, the Supplier is responsible for the basic infrastructure/civil works design, which includes all structural elements required for the safe and secure installation of the air quality monitoring equipment. However, regarding land clearing, permits, and legal site access, the responsibilities are shared but primarily facilitated through coordination with UNOPS and local partners(UNEP PMU AND DNMG). Here's the breakdown:1. Land Clearing and Site PreparationWhile the Supplier is responsible for site-specific civil works (e.g., foundations, poles, enclosures, and cable routing), the initial land clearing and provision of a physically accessible site is typically facilitated by UNOPS and/or the host institution (e.g., Government or Municipality) inclose coordination with DNMG in Timor Leste.The Supplier must conduct a site visit or coordinate with a designated local partner present or establshed in the country (approved by UNOPS) to verify the condition of each site and flag any land clearing needs that may impede construction or pose HSSE risks.If additional clearing is required as part of the installation works, this should be factored into the civil works design and work plan, and communicated during the review process.2. Land Permits and Other Regulatory DocumentsPermitting and legal authorization for land use (e.g., land ownership documentation, no-objection letters, environmental permits) are not solely the Supplier’s responsibility. These are typically facilitated by UNOPS in collaboration with host country stakeholders, including relevant authorities.However, the Supplier must ensure that their design adheres to all applicable local standards and regulations, and should highlight any specific permitting needs during the site visit or design review phase so they can be addressed in a timely manner. 

New clarification added: QUESTIONDear Sir/Madam,I want to ask some questions1. It said that for the 1st phase, the quantity of Low Cost Sensor is 80 units. Is the delivery time still 5 weeks?ANSWER1. Yes, the delivery timeline of 5 weeks remains applicable for the first phase involving 80 low-cost air quality sensors, provided the supplier confirms availability of stock or a clear manufacturing and shipping schedule upon contract award. Please note that although Phase 1 involves the installation of 80 units, the delivery will follow a single-batch approach covering all 160 sensors as outlined in the procurement plan. Therefore, the original delivery timeline of five (5) weeks remains unchanged, and applies to the full batch of 160 units.This approach ensures streamlined logistics, uniform quality control, and sufficient stock availability in-country ahead of the Phase 2 rollout.Given the relatively large quantity and the importance of timely deployment to align with planned field integration and training (including with DNMG ), we expect bidders to:Provide a detailed delivery plan, including manufacturing lead time (if applicable),Clearly state the logistics arrangements and expected timelines from point of dispatch to Dili, Timor-Leste,Include customs clearance provisions and support (if required),Specify if partial deliveries are possible within the 5-week window, with remaining units staggered in line with deployment priorities.Please note that delivery performance will be an evaluated criterion as part of the bid assessment, and suppliers must commit to a realistic but efficient timeline that does not delay downstream activities such as installation, training, and integration into the air quality framework in Timor leste. A plan for the delivery of the remaining sensors should be explicitily detailled in the submission. 

New clarification added: QUESTION4. ‌Payment Terms‌a) Will goods and services be invoiced/paid separately?b) Can full goods payment be claimed post-delivery acceptance (before service completion)?ANSWER4a) Yes, goods and services will be paid separatelyb) Yes, UNOPS accept staged payment after milestones are completed. A more detailed payment schedule can be agreed with the winning bidder at contracting stage.

New clarification added: QUESTION3. Related services requirements - 6. Installation of the Hybrid Ambient Monitoring System. ‌a) Please confirm that foundation/civil works for reference graded instruments and sensors are entirely the end-user's responsibility.‌b) Could you confirm the installation scope includes ‌2 sets of reference graded systems and 80 sets of sensors‌?c) The quantity states "1 year"— this period of time is quite long, does this imply phased installation? If so, please specify the planned batch quantities and timelines.ANSWERa) Foundation/Civil Works Responsibility:The Supplier is responsible for the foundation and all associated civil works required for the installation of both reference-grade instruments and low-cost sensors. This includes, but is not limited to, mounting poles, enclosures, cable routing, and site preparation as per the infrastructure/civil works design to be submitted for UNOPS approval prior to implementation.b) Scope of Installation:Yes, the scope of installation includes:2 sets of reference-grade systems80 low-cost sensors during Phase 1 deployment.Please note that while 80 sensors will be installed during the initial phase, the full batch of 160 sensors will be delivered under a single delivery, with the remaining 80 units allocated for Phase 2, based on future implementation timelines.c) Installation Duration ("1 year"):The "1 year" stated in the documentation refers to the total implementation period, including both phases of installation and any necessary staggered deployment to align with site readiness and stakeholder coordination.Phase 1: Installation of 80 sensors and 2 reference-grade systems over the first 2–3 months following delivery.Phase 2: Installation of the remaining 80 sensors within the 12-month project duration, depending on site confirmation and logistical arrangements.This second phase installation is going to be conducted by the technical staff of DNMG. As the second set of sensors are supposed to be considered as back up sensors and replacement of faulty sensors.This phased approach allows flexibility for operational planning and progressive commissioning of the network.

New clarification added: QUESTIONWe appreciate the opportunity to participate in this bid and seek clarifications on the following points to ensure accurate proposal submission:2. Delivery requirements and Comparative Data Table: ‌a) Please confirm if single-batch delivery to the consignee's address suffices.b) Verify that onward transportation to installation sites is excluded from our scope.ANSWERa) Single-Batch Delivery to Consignee's AddressYes, a single-batch delivery to the designated consignee address is acceptable, provided that:All equipment is delivered in full compliance with the agreed delivery schedule and specifications.The packaging and documentation are clearly labeled for identification and inventory purposes.The equipment is accompanied by the required customs clearance documents, warranty certificates, and any pre-installation instructions (as applicable).The official consignee address and contact details will be provided during the contract finalization stage.b) Transportation to Installation SitesPlease note that the Supplier is responsible for transporting the equipment from the consignee’s central delivery point to the final installation sites.This includes coordination, safe handling, and secure delivery of the equipment to each designated location as per the implementation schedule.The Supplier shall ensure that all required equipment and materials arrive in good condition and are available on-site for timely installation and commissioning.Transportation arrangements should consider local site access conditions, and any required coordination with local authorities or project stakeholders.These requirements should be fully reflected in your proposal, including the pricing structure and work plan.

New clarification added: QUESTIONDear Chief Procurement Officer,We appreciate the opportunity to participate in this bid and seek clarifications on the following points to ensure accurate proposal submission:1. Detailed Technical Specifications: - 2.Reference graded Instruments - Software Compatibility‌The specification requires reference-grade instruments to be compatible with Comet software, with pre-installation on laptops. As manufacturers typically use proprietary air quality data processing software, may we install our equivalent software if it ensures equivalent functionality and data interoperability?Looking forward to your earliest response. Many thanks!ANSWERClarification on Software Compatibility – Reference-Grade InstrumentsThe requirement for compatibility with your specialized software is intended to ensure data uniformity, interoperability, and centralized data integration across all stations in the network. However, we recognize that reference-grade instrument manufacturers often provide proprietary software suites that offer robust and specialized functionalities for calibration, QA/QC, and data acquisition.Accordingly, we clarify the following:Yes, you may propose your manufacturer’s proprietary software provided that it meets or exceeds the minimum functional requirements listed below, and is fully interoperable with the centralized data system.Minimum Functional Requirements for the Software:Real-time data acquisition with configurable sampling intervals;Automatic data backup and fail-safe mechanisms;Remote access and diagnostics capabilities;Data export in standard formats (e.g., CSV, JSON, XML, or via API);Metadata integration (e.g., instrument ID, timestamp, calibration logs);Secure data transmission protocols (e.g., HTTPS, FTP/SFTP);Interoperability with existing data visualization or management platforms managed by DNMG;Integration pathways or adapters (e.g., API bridges) to ensure data accessibility by the national air quality management system hosted by DNMG (or UNEP/UNOPS partners as needed).Pre-Installation on Laptops:The software must be pre-installed and fully configured on the laptops to be supplied, including all necessary drivers, licenses, and user manuals.We encourage bidders to include a technical brief outlining their proposed software’s features and integration strategy to support evaluation and harmonization across the network.

New amendment added #2: Amendment 2 This amendment is to :Extend the submission deadline to 26 May 2025 

New amendment added #1: Amendment 1This amendment is to: 1. Upload the Minutes and Presentation of the Prebid Meeting 2. Upload amendment to the tender document containing adjustments to the specifications. Additional details or updated revision are highlighted in blue font. Components removed from the specification is highlighted in red strikethrough font 3. Extend the submission deadline to 21 May 2025

New clarification added: QUESTIONDear UNOPS Team, 1. We cannot identify Comparative Tables in Section IV. Provide for our completion.2. Please advise when we can receive responses to the technical inquiries that we submitted.3. Because of the delayed response and the large gaps in some of these technical descriptions, we request a minimum of 10 business days after your response to our questions to complete the bid submittal.Thanks.ANSWER1. Due to limitation of the space in the document, please provide the detailed specs of the goods and services offered in Annex 1 (The Excel Sheet document) which will be used to assess the offer against the technical specifications2. All questions / technical queries were responded on 2 May, 5 May, and last batch of questions were answered on 7 May 2025 (today)3. UNOPS will check internally and consider the time extension. If approved, it will be reflected in the amendment of the tenderBest regards UNOPS

New clarification added: QUESTIONRegarding “Services Tab” – Main SpecificationsSection 3Training and Maintenance.4.1 – Item 1.  We understand that we will conduct an online training via Teams (or similar) to Pre-train the technicians prior to our installation.  Please confirm.4.1 – Item 5.  Is the online training program 5 days?  What training program is 5-day duration, please elaborate.4.1 – Item 6.  We don’t understand this line item.  Do you want us to bring some number of Timor-Leste technicians and operators to the manufacturer site for training?  And, if so, please advise what you want in the budget – 3 star hotel, meals, airplane tickets, days of training, number of staff people, arrangement of visas, etc.4.2 – Item 1.  Can we define initial operational support in a defined period of time?  For example, after several days of training, can we assume that this is suitable amount of time for technicians to be well-versed in normal operational tasks?  Please advise.4.2 – Item 7.  The time between consecutive maintenance and/or calibration of system components shall be at least 26 weeks.  We don’t understand.  The MetOne BAM (as an example) requires a tape change at an interval of approximately 1x every 9-10 weeks.  Also, for EPA Equivalency (FRM/FEM use) and regulatory reporting (e.g., under U.S. EPA), strict quarterly audits and calibrations are typically required.  Finally, when operating most equipment in dusty, humid, near sea water and other demanding conditions, it is typical to increase the maintenance cycle.  Please advise. 4.2 – Item 9.  Our equipment does not require lightning protection.  However, if mandated, then we will supply.  If we are required to supply lightning protection, we need to be provided some details on the building (roof height above ground and an image of the area) – including existing building lightning protection system. ANSWERSection 3: Training and Maintenance4.1 – Item 1:Online Pre-Installation Training Requirement:Prior to the on-site installation of the air quality monitoring equipment, suppliers are expected to conduct comprehensive online training sessions for designated technicians and technical personnel. These sessions should be facilitated through reliable virtual platforms such as Microsoft Teams, Zoom, or equivalent, ensuring accessibility and interactive engagement.​Objectives of the Online Training:Foundational Knowledge Transfer:Provide an in-depth overview of the equipment's specifications, functionalities, and operational principles.Discuss the integration of the equipment within the broader hybrid ambient air quality monitoring system, including the interplay between low-cost sensors, reference-grade instruments, and data analytics platforms.​Installation Preparation:Outline the step-by-step installation procedures, highlighting critical considerations for site readiness, safety protocols, and environmental factors.Review necessary tools, materials, and pre-installation checklists to ensure a streamlined on-site deployment.​Operational Training:Demonstrate the initial setup processes, including calibration, configuration, and activation of the monitoring equipment.Guide participants through the software interfaces, data retrieval methods, and real-time monitoring capabilities.​Maintenance and Troubleshooting:Educate technicians on routine maintenance schedules, component replacements, and system diagnostics.Provide troubleshooting techniques for common issues, ensuring minimal downtime and sustained operational efficiency.​Training Materials and Resources:Distribute comprehensive training manuals, user guides, and standard operating procedures (SOPs) in advance to facilitate pre-session preparation.Utilize visual aids such as diagrams, flowcharts, and videos to enhance understanding of complex concepts.Incorporate interactive elements like quizzes or Q&A sessions to assess comprehension and address queries in real-time.​Scheduling and Duration:Coordinate with the client to schedule sessions at mutually convenient times, accommodating different time zones and work schedules.Allocate sufficient time for each module, ensuring thorough coverage of topics without overwhelming participants.​LinkedInPost-Training Support:Offer continued virtual support post-training to address any emerging questions or challenges encountered during the actual installation.Provide access to recorded sessions and supplementary materials for future reference and onboarding of additional personnel.​By implementing this structured online pre-training program, suppliers will empower the client's technical team with the necessary knowledge and skills to actively participate in the installation process, fostering a collaborative environment and ensuring the long-term success of the air quality monitoring initiative.4.1 – Item 5:Training Program Duration: The reference to a 5-day training program pertains to comprehensive training covering equipment operation, maintenance, data management, and troubleshooting. Suppliers should provide a detailed training schedule outlining the curriculum and duration.​4.1 – Item 6:In alignment with our capacity-building objectives, we expect the supplier technical team to conduct on-site training sessions concurrently with the installation of the equipment. This approach ensures that our technicians and technical personnel receive hands-on training during the actual setup process, facilitating immediate knowledge transfer and practical understanding of the equipment's operation and maintenance.​Please include provisions for this integrated training approach in your planning, ensuring that adequate time and resources are allocated for comprehensive on-site instruction during the installation period. The change on the training requirement will be reflected in the TOR amendment issued shortly4.2 – Item 1:Initial Operational Support Period: Initial operational support is expected for a defined period post-installation, typically until local technicians are proficient in routine operations. Suppliers should specify the duration of this support period in their proposals.​4.2 – Item 7:Maintenance and Calibration Intervals: While a 26-week interval is suggested, maintenance schedules should adhere to manufacturer recommendations and environmental conditions. For instance, the Met One BAM 1020 requires filter tape changes approximately every 8 weeks, with more frequent maintenance in dusty or humid environments ​. Suppliers should provide maintenance schedules aligned with these guidelines.​ The change on this requirement will be reflected in the TOR amendment issued shortly4.2 – Item 9:Lightning Protection: this item will be removed from the requirement. .​ The change on this requirement will be reflected in the TOR amendment issued shortly

New clarification added: QUESTIONRegarding “Services Tab” – Main SpecificationsSection 21.       (Excel Cell A12).  We assume that the roof-tops of the buildings that will house the 2x Reference Graded equipment are of satisfactory construction to hold a static load of approximately 500 kg on a ~80 x 80 cm base.  Therefore please advise if further civil works design is required for this.Regarding the low cost ambient monitors, we understand that each of the low cost installations will require suitable pole installation, concrete pad, support equipment for solar kits.  We assume security fencing is not a requirement.2.       Regarding this item, it states that we should conduct or coordinate site visits for data collection.  We are not crystal clear on this requirement. A.      We are required to set-up the equipment to automatically communicate via 3g/4g mode.  In which case no direct human interaction will be required for data collection.B.       We are required to train site personnel to operate the equipment and conduct regular consumable replacement and maintenance.  Further to this point, we will train them to collect data from the device if there is a communication failure.C.      Can we assume that we will interact with the trained technicians via Teams meeting or similar, and direct/coordinate them to collect data should there be a 3g/4g or other communications failure?ANSWERSection 2: Structural and Installation ConsiderationsItem 1 (Excel Cell A12):Structural Load Capacity: It is assumed that the slabs at the location can support a static load of approximately 500 kg on an ~80 x 80 cm base. The project should provide such information to the supplier prior the deployment. If structural reinforcements are necessary, they should be identified and addressed accordingly.​Low-Cost Ambient Monitors Installation: Each low-cost monitor installation will require a suitable pole, concrete pad, and support equipment for solar kits. Security fencing is not a requirement.Item 2: Site Visits for Data CollectionA. Equipment Communication: Equipment should be configured for automatic data transmission via 3G/4G networks, minimizing the need for manual data collection.​B. Training for Site Personnel: Suppliers are expected to train site personnel on equipment operation, routine maintenance, and data retrieval procedures in case of communication failures.​C. Remote Coordination: Yes, suppliers can coordinate with trained technicians via virtual meetings (e.g., Teams) to guide data collection or troubleshooting efforts during communication outages.​ 

New clarification added: QUESTIONRegarding “Services Tab” – Main SpecificationsSection 11.       (Excel Cell A7). Does the Pre-installation service require us to mobilize to all sites prior to our “actual” installation?Can you please confirm that you have a computer that will be utilized to load the comet software at the Reference Graded Equipment locations?.  And, Pre-installation does not include our purchasing of computers or other components. Please advise if you intend our team to run cabling through the building and to the roof-top location of the Reference Graded equipment.  If the answer is yes, can you please advise us to the linear distances of cable run. Regarding electrical components and cabling, we assume that the Facility is providing electrical service and connections to the roof-top locations.  Please advise.ANSWERSection 1: Pre-Installation and Site PreparationItem 1 (Excel Cell A7):Mobilization to All Sites: Yes, pre-installation services require mobilization to all designated sites to assess site readiness, including power availability, structural integrity, and optimal placement for equipment,Which is not the responsability of the supplier.​ The site survey will answer these siting considerations to enable the supplier to undertake a good installation. Provision of Computers for Comet Software: The Supplier will provide computer for loading the Comet software at the Reference Grade Equipment locations. Suppliers are expected to supply and configure the necessary computing equipment to ensure full functionality of the monitoring systems.​Cabling Through Buildings: Yes, suppliers are responsible for running cabling from the equipment to the locations. The linear distances for cable runs will vary by site; detailed site surveys will provide specific measurements.​Electrical Service and Connections: The facility will provide access to electrical service at the locations. However, suppliers are responsible for making the final connections and ensuring compatibility with the provided power sources.                          

New clarification added: QUESTIONDear UNOPS Team, Can you help to clarify the following questions/ unclear information?3.Regarding Main Specifications of “NO2 Diffusion Tubes”Diffusion tubes are typically passive sampling devices that are set up for a distinct time interval (such as 7 - 21 days) and then sent to a lab for analysis. Item 1:  The tubes are referred to as NO2 sensors.  A sensor is much different than a diffusion tube, can you please clarify?Item 2:  Please clarify if the type and reagent quality refer to an active sampling scenario or passive?Item 3:  Regarding the response time, do you suggest that we should be collecting NO2 readings from the sensor in intervals of 1 minute or less?  However, later in item 3, you refer to exposure duration as “capable of continuous sampling over periods ranging from 2 to 4 weeks”.  The response time indicates a sensor based reading. . . yet the exposure duration indicates a passive sampling device.  Please clarify.Item 4:  If we are installing diffusion tube samplers, there is no power required.  If we are installing NO2 sensors, we may need power.  Additionally, we would need to know how many additional pollutant/environmental sensors that we are installing (as requested in No. 12), prior to sizing or quoting the necessary solar power station.Item 5:  We don’t understand what data you want logged for NO2 – if, we are sampling with passive diffusion tubes.  Similarly, if we are required to use diffusion tubes, do you need real-time data access? Item 8:  We again see reference to two different methodologies – sensor-based and diffusion tube-based.  Self-diagnostics with remote calibration checks may be done on sensors.  However, the verbiage referencing compatibility and transport appear to align with passive diffusion tubes.Item 11:  This item references NO2 sensors.Item 12:  Do you require us to include pricing for an ambient station, similar to the ambient sampling stations defined in “Main Specifications of Low Cost Sensors”, above?  With notation, the configuration and integration of a passive diffusion tube does not require a fixed station, nor does it require electricity.  Therefore, by adding PM2.5, O3, temperature, humidity and wind speed/direction – that is a significant change.ANSWERPlease find below our itemized responses, clarifying that the project intends to deploy sensor-based NO₂ monitors, not passive diffusion tubes.Item 1: Terminology – Diffusion Tubes vs. SensorsYou are correct that there is a fundamental difference between diffusion tubes and sensors.The reference to “NO₂ diffusion tubes” in the specification was a misnomer. The project requires active, real-time NO₂ sensors, not passive diffusion tubes. Please consider “NO₂ sensors” as the correct and intended term.Our objective is to deploy sensor-based NO₂ monitors capable of providing continuous, real-time data.​Item 2: Type and Reagent QualityThe reference to “type and reagent quality” pertains to sensor-based technology, not passive sampling.We expect electrochemical NO₂ sensors or equivalent real-time technology with appropriate calibration and interference mitigation. No chemical reagents are expected in the passive sense.Item 3: Response Time and Exposure DurationThe intended system is sensor-based with real-time or near-real-time NO₂ data acquisition, ideally at 1-minute to 15-minute intervals.The mention of a response time of 1 minute or less and an exposure duration of 2 to 4 weeks aligns with the capabilities of active NO₂ sensors. These sensors are designed for continuous operation over extended periods, providing high-resolution data with rapid response times. The exposure duration refers to the intended deployment period before maintenance or calibration is required.Please disregard the passive sampling interpretation.You are correct in noting the inconsistency. The earlier mention of “exposure duration of 2–4 weeks” was carried over from passive tube methodology and should be disregarded.Item 4: Power Requirements and Additional SensorsActive NO₂ sensors necessitate a power source for operation. We anticipate deploying these sensors in conjunction with other environmental sensors, such as temperature, humidity, Pressure, and wind speed/direction if possible. Therefore, we require a power solution, preferably solar-powered, capable of supporting the entire sensor suite.Item 5: Data Logging and AccessSince we are using sensor-based NO₂ monitoring, data logging is required, with remote access to real-time data. Passive sampling does not apply, and there is no need to consider offline lab analysis or manual data retrieval.Item 8: Methodology Clarification – Self-Diagnostics and CompatibilityAs the methodology is sensor-based, self-diagnostics and remote calibration checks are part of the expected features. The original references to diffusion tube transport and compatibility should be ignored. Instead, focus on sensor specifications that allow for remote maintenance and network integration.Item 11: Confirmation of NO₂ SensorsYes, the reference here is correct. The project explicitly requires NO₂ sensors, not passive diffusion tubes.Item 12: Requirement for Ambient StationYes, please include pricing for a complete ambient sensor station that integrates NO₂ sensors with additional parameters such as temperature, humidity, Pressure, and wind speed/direction. This configuration must be powered (e.g., via solar) and capable of data logging and wireless transmission. Which means an integrated solution for a low cost sensor that emcompasses many pollutants as mentionned above may be a plus for the operation of the project. However we would like to remind you that the pollutants of interest are PM2.5, PM10 and NO2. One type of PM Sensor will include(PM2.5, PM10 and temperature, humidity, Pressure, and wind speed/direction) and the other type will include NO2 and temperature, humidity, Pressure, and wind speed/direction.

New clarification added: QUESTIONDear UNOPS Team, Can you help to clarify the following questions/ unclear information?2. Regarding Main Specifications of Low-Cost Sensors (130)Confirm that all pollutants are required on each ambient station – Primary and Secondary (inclusive of PM2.5, PM10, NO2, SO2, CO, O3)ANSWERIn alignment with the project's objective to establish a comprehensive hybrid ambient air quality monitoring system, each low-cost sensor unit—whether designated as a primary or secondary station—is required to measure the following pollutants:​Particulate Matter (PM2.5 and PM10)Nitrogen Dioxide (NO₂). These pollutants are essential for ensuring consistency across the monitoring network and facilitating accurate calibration and validation against reference-grade instruments.​Additionally, while not mandatory, the inclusion of sensors for the following pollutants would be advantageous:​Ozone (O₃)Carbon Monoxide (CO)Carbon Dioxide (CO₂)Sulfur Dioxide (SO₂)​The integration of these additional sensors would enhance the comprehensiveness of the monitoring system and provide valuable data for a more detailed assessment of air quality. 

New clarification added: QUESTIONDear UNOPS Team, Can you help to clarify the following questions/ unclear information?1. Regarding Main Specifications of “2 Reference Graded Instruments”Items 8 and 12:  We assume that the client will provide the computer (for Comet software) and the RS-232 cable to the location of the BAM.  Please confirm.Item 10:  Can you please confirm that your team requires both the PM10 size selective cut and the PM2.5 cyclone?  For our regular customers we typically provide only PM2.5.ANSWER1. Provision of Computer and RS-232 Cable (Items 8 and 12)We confirm that our team does not currently possess a dedicated computer or RS-232 cable for interfacing with the BAM-1020 units. Therefore, we kindly request that the supplier includes the following with each instrument:​A compatible computer or laptop pre-installed with the COMET® software for data acquisition and instrument configuration.A female-to-female 9-pin null modem RS-232 cable (e.g., Belkin F3B207-06), as recommended by the manufacturer, to facilitate direct communication between the BAM-1020 and the computer.2. Item 10: For the scope of this project, we require both the PM10 size selective inlet and PM2.5 very Sharp Cut Cyclone