P-MT011 Portable Multi-Parameter Water Quality Analyzer
The pH sensor operates on electrochemical principles, utilizing a matched pair of a pH-sensitive measuring electrode and a reference electrode to deliver precise, linear pH measurement across a wide range of aqueous media. Engineered with an industrial-grade electrode core, the sensor supports a broad range of interchangeable probe types — including ultra-pure water, high-temperature, low-temperature, flue gas desulfurization/denitrification (FGD/SCR), and hydrofluoric acid (HF)-resistant variants — to meet the demands of diverse industrial processes.
The integrated temperature sensor provides real-time automatic temperature compensation (ATC), ensuring measurement accuracy across fluctuating process conditions. Digital signal processing converts analog readings into reliable digital output via RS-485 with standard Modbus RTU protocol, enabling seamless integration with SCADA systems, PLCs, data loggers, and other networked industrial terminals.
| Probe Type | Typical Application |
| Standard water / wastewater | General clean water and municipal wastewater |
| Industrial wastewater | Heavy industrial effluent with aggressive chemistry |
| Pure water | Demineralized / deionized process water |
| High-temperature | Steam condensate, sterilization, and high-heat processes |
| Low-temperature | Cold-chain, refrigerated, or near-freezing media |
| FGD / SCR (desulfurization / denitrification) | Flue gas scrubbing slurries |
| HF-resistant (hydrofluoric acid) | Semiconductor, glass etching, and fluoride-bearing streams |
| High-temperature pure water | High-purity boiler feedwater and power generation circuits |
| Parameter | Specification |
| Measured Parameters | pH, Temperature |
| Measurement Method | Glass electrode method |
| pH Range | 0 – 14 pH (customized) |
| Temperature Range | 0 – 85 °C |
| Accuracy | ≤ ±0.1 pH |
| Repeatability | ≤ ±0.1 pH |
| Resolution | 0.01 pH |
| Response Time | ≤ 30 s |
| Drift | ≤ ±0.1 pH/period |
| Temperature Compensation Accuracy | ≤ ±0.1 pH |
| Calibration Interval | 3 months (or as required by site conditions) |
| Operating Temperature | 0 – 65 °C |
| Ingress Protection | IP68 |
| MTBF | ≥ 1,440 hours |
| Installation Method | Flow-through (flow cell) / Submersion (immersion) |
| Communication Protocol | RS-485 (Modbus RTU) or 4-20 mA |
| Supply Voltage | 9 – 30 V DC |
| Housing Material | ABS |
| Weight | 500 g |
| Signal Cable | 5 m (standard); custom lengths available on request |
Q1: What is the difference between S-pH001 and S-pH002?
The S-pH002 features an upgraded industrial-grade composite electrode core supporting 8 interchangeable probe types — including HF-resistant and FGD/SCR variants — making it suited for more demanding industrial processes. The S-pH001 is optimized for standard water quality monitoring applications.
Q2: Does the S-pH002 support 4-20mA output?
The S-pH002 standard version outputs RS-485 with Modbus RTU protocol. If your system requires 4-20mA analog output, please contact our sales team — customized output configurations are available.
Q3: How often does the pH sensor need to be calibrated?
Under normal operating conditions, calibration is recommended every 3 months. In high-fouling environments (industrial wastewater, slurries), more frequent calibration may be required. The sensor supports single-point and two-point buffer calibration.
Q4: Which probe type should I select for ultra-pure water monitoring?
For ultra-pure water (deionized or demineralized water), select the Pure Water or High-Temperature Pure Water probe variant. Standard glass electrodes can give unstable readings in low-conductivity media; these specialty probes are designed to maintain accuracy in such conditions.
Q5: Is the S-pH002 compatible with third-party controllers and SCADA systems?
Yes. The standard Modbus RTU protocol over RS-485 ensures compatibility with most PLCs, data loggers, and SCADA platforms (including Siemens, Schneider, Ignition, and WinCC). Register maps are available in the product manual.
