| Priority | Evaluation Dimension | | 01 | Water Quality Performance | For Type 1 ultrapure water, a resistivity of approximately 18.2 MΩ·cm at 25°C and a total organic carbon level commonly below 5–10 ppb are widely used laboratory benchmarks. | Independent test reports, product specifications, calibration records, and a clear explanation of measurement temperature and test methods. | Confirm that the specification is suitable for the actual application, such as molecular biology, chromatography, trace-element analysis, cell culture, or general analytical work. |
| 02 | Feed-Water Compatibility | The system should define acceptable feed-water quality, including source type, hardness, conductivity, chlorine, silica, microbial load, and pressure range. | Feed-water requirements, pretreatment diagram, rejection-rate data, installation limits, and a water-quality survey form. | A reliable supplier should help evaluate local municipal water conditions and recommend pretreatment without oversizing the system unnecessarily. |
| 03 | Purification Technology | Common configurations may combine pretreatment, reverse osmosis, deionization, ultraviolet treatment, ultrafiltration, and final-point filtration according to application risk. | Process-flow diagram, explanation of each purification stage, consumable life estimates, and documented performance under representative operating conditions. | Choose a modular design so maintenance can be performed by replacing individual cartridges or modules rather than the entire system. |
| 04 | Capacity and Recovery | Select production capacity according to daily demand, peak demand, storage volume, dispensing frequency, and required operating hours. Reverse-osmosis recovery varies by design and feed-water conditions. | Rated flow at stated temperature and pressure, recovery percentage, refill time, storage-tank capacity, and performance data at peak demand. | Ask for calculations based on the destination site's real demand instead of relying only on a nominal liters-per-hour rating. |
| 05 | Monitoring and Alarms | Essential monitoring may include resistivity or conductivity, temperature compensation, TOC where required, pressure, flow, leak detection, and consumable status. | Interface screenshots, alarm list, data-export options, sensor accuracy information, and user-access controls. | Verify whether measurements use internationally recognized units and whether remote access complies with the buyer's IT and cybersecurity policies. |
| 06 | Standards and Documentation | Documentation should clearly identify materials, electrical specifications, water-quality limits, operating procedures, maintenance procedures, and applicable conformity requirements. | User manual, installation manual, wiring diagram, conformity documentation, validation templates, certificates of analysis, and preventive-maintenance schedule. | Confirm that documents are available in the required language and that electrical frequency, voltage, plug type, and local installation rules are supported. |
| 07 | Consumables and Operating Cost | Total cost should include filters, purification cartridges, UV lamps where applicable, membranes, sanitization chemicals, water usage, electricity, labor, and disposal. | A multi-year consumables list, replacement intervals, unit prices, recommended stock levels, and a clear warranty exclusion list. | Prefer commonly available consumables or a documented supply plan that reduces the risk of long international lead times. |
| 08 | Installation and Commissioning | The supplier should provide site requirements for water inlet, drain, electrical supply, ventilation, floor or bench loading, clearance, and ambient temperature. | Site-preparation checklist, commissioning protocol, acceptance criteria, installation drawings, and operator-training plan. | Confirm whether installation can be completed by trained local technicians and whether remote commissioning assistance is included. |
| 09 | After-Sales Service | A dependable service model should define response times, spare-parts availability, troubleshooting procedures, preventive maintenance, and escalation channels. | Service-level agreement, support contact structure, technician coverage, spare-parts policy, training materials, and service case workflow. | Ask how support is delivered across time zones and whether assistance is available by email, phone, video, or remote diagnostics. |
| 10 | Warranty and Reliability | The warranty should state coverage periods, covered components, exclusions, required maintenance, replacement procedures, and shipping responsibilities. | Written warranty terms, reliability records where available, failure-reporting process, and reference installations with similar applications. | Compare warranty coverage with the expected shipping time and local service capability in the destination country. |
| 11 | International Logistics | Export packaging should protect the system from vibration, moisture, impact, and temperature variation during transportation and storage. | Packing dimensions, gross weight, shipping terms, customs documentation, insurance options, and delivery-time estimates. | Clarify responsibility for customs clearance, import taxes, local delivery, damage inspection, and replacement of transit-damaged parts. |
| 12 | Supplier Transparency | Quotations should separate equipment price, accessories, installation, training, freight, taxes, consumables, software, and recurring service costs. | Itemized quotation, technical compliance matrix, project schedule, payment terms, change-control process, and customer references from comparable regions. | Select a supplier that provides verifiable technical data and realistic operating costs rather than relying only on a low initial purchase price. |