GreenPrima GP8200 MAS Secondary Water Supply Monitoring System

Overview

The GreenPrima GP8200 MAS Secondary Water Supply Monitoring System is an integrated, modular online water quality analyzer engineered for continuous, real-time surveillance of potable water distribution networks—specifically at intermediate storage tanks, booster pump stations, and building-level transfer points. Designed in accordance with the technical requirements of China’s Regulations on Hygiene Supervision of Secondary Water Supply Facilities (WS/T 679–2020) and aligned with international operational principles for distributed water quality assurance, the system employs multi-parameter electrochemical and optical sensing technologies—including glass electrode pH measurement, amperometric free chlorine detection, nephelometric turbidity analysis, four-electrode conductivity determination, galvanic dissolved oxygen sensing, and redox potential (ORP) monitoring. All sensors operate independently within dedicated signal conditioning channels, eliminating cross-talk and ensuring metrological integrity across simultaneous measurements. The system does not require chemical reagents, thereby eliminating consumable dependency, operator intervention frequency, and secondary contamination risk—critical for maintaining regulatory compliance in sensitive urban drinking water infrastructure.

Key Features

• Modular sensor architecture enabling flexible configuration: users select only the parameters required (e.g., pH + free chlorine + turbidity for routine compliance; full suite including DO, ORP, and conductivity for advanced corrosion or disinfection by-product assessment)
• High-fidelity analog signal processing with temperature-compensated algorithms—supporting NTC10K or PT1000 probe inputs for automatic thermal correction across –10 °C to 130 °C
• Reagent-free operation: eliminates calibration drift from reagent degradation and avoids introducing foreign substances into monitored water streams
• Multi-protocol digital connectivity: native Modbus RTU over RS485; optional embedded DTU supporting tri-carrier GPRS (China Mobile, Unicom, Telecom), Wi-Fi (802.11 b/g/n), and 10/100 Mbps Ethernet
• Local human-machine interface: 10-inch capacitive touchscreen with intuitive Chinese-language navigation, real-time trend graphs, alarm history log, and manual override capability for relay control
• Robust industrial enclosure rated IP65, suitable for indoor equipment rooms or semi-outdoor pump station environments
• Eight programmable SPST relays (5 A @ 250 VAC / 30 VDC) for direct integration with dosing pumps, solenoid valves, or audible/visual alarm devices

Sample Compatibility & Compliance

The GP8200 MAS is validated for continuous monitoring of cold, non-aggressive potable water within municipal secondary supply systems—covering typical hydraulic residence times (minutes to hours) and temperature ranges (0–40 °C operational; up to 100 °C for short-term thermal event logging). It meets essential performance criteria outlined in GB/T 5750.5–2023 (Standard Methods for Examination of Drinking Water – Physical and Physicochemical Parameters), GB/T 5750.11–2023 (Disinfectant Residues), and JJG 822–2019 (Calibration Regulations for Turbidity Meters). While not certified to ISO/IEC 17025 for accredited testing, its measurement stability and repeatability support GLP-aligned operational data recording. Sensor output linearity, hysteresis, and long-term drift characteristics are traceable to national metrological standards via factory calibration certificates (NIM-accredited reference methods applied during production).

Software & Data Management

Data acquisition and visualization are managed through the Geop Cloud Platform—a secure, role-based web application accessible via desktop browsers, mobile-responsive HTML5 interfaces, official WeChat Mini Program, and native iOS/Android applications. All communications employ TLS 1.2 encryption; device authentication uses unique MAC-bound tokens. The platform provides time-synchronized multi-parameter dashboards, configurable alarm thresholds (with hysteresis and delay logic), audit-trail-enabled event logs (including relay state changes and manual overrides), and exportable CSV/PDF reports compliant with internal QA documentation workflows. Optional FDA 21 CFR Part 11 readiness is available via add-on electronic signature module and enhanced user access controls—supporting regulated environments requiring ALCOA+ data integrity principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Applications

• Real-time compliance verification at rooftop water tanks and basement reservoirs per local health authority mandates
• Early detection of disinfectant decay, biofilm formation indicators (e.g., declining ORP, rising turbidity), or cross-connection events (abnormal conductivity spikes)
• Performance validation of UV or chlorine dioxide disinfection units installed downstream of storage
• Corrosion potential assessment in aging cast-iron or galvanized piping networks using combined pH, ORP, and conductivity trends
• Remote supervision of decentralized water assets by property management firms or municipal utilities lacking on-site technicians
• Integration into BMS (Building Management Systems) or SCADA platforms via Modbus TCP or OPC UA gateways (via optional protocol converter)

FAQ

Does the GP8200 MAS support remote firmware updates?
Yes—secure over-the-air (OTA) updates are supported via the Geop Cloud Platform when connected through Ethernet or GPRS/Wi-Fi. Updates undergo cryptographic signature verification prior to installation.
Can sensor modules be replaced without system shutdown?
All sensor cartridges are hot-swappable; the controller automatically detects new modules and loads corresponding calibration coefficients from embedded EEPROM.
Is third-party calibration certificate included with delivery?
Each unit ships with a factory calibration report referencing national standard solutions (GBW series). NIST-traceable certificates are available as a paid option.
What is the maximum sampling interval for historical data storage on-device?
Internal flash memory retains 30 days of second-by-second raw data at default 10-second logging intervals; extended retention is handled exclusively in the cloud.
How is electrical isolation implemented between sensor inputs and relay outputs?
Galvanic isolation (≥1500 V_RMS) is provided between all analog input channels, digital I/O, and power domains—verified per IEC 61000-4-5 surge immunity standards.