Water sensors play a crucial role in monitoring water quality across industrial, municipal, agricultural, and environmental sectors. As global water systems expand and regulatory standards become stricter, real-time monitoring of water parameters is essential to ensure safety, efficiency, and environmental compliance.
Modern water sensors measure physical and chemical properties such as turbidity, pH, conductivity, total dissolved solids (TDS), salinity, suspended solids, and even multi-parameter combinations. These measurements are vital for water treatment plants, wastewater facilities, aquaculture, food & beverage industries, cooling towers, and environmental monitoring applications.
With robust constructions, high accuracy, digital communication (RS485 Modbus), and compatibility with PLC/HMI/SCADA platforms, today’s water sensors integrate seamlessly into automated industrial control systems.
What is a Water Sensor?
A water sensor is an electronic instrument that detects, measures, and monitors specific water-quality parameters. Depending on the parameter being measured, the sensor uses one of the following principles:
Optical Sensors
Used for turbidity, suspended solids (SS), MLSS.
Operate using light-scattering or absorption:
90° scattered light
Infrared absorption
Laser-based turbidity detection
Electrochemical Sensors
Used for pH, ORP, conductivity (EC), TDS, salinity, ions.
Operate using:
Glass electrode electrochemistry (pH)
Conductivity cell constants (EC)
Temperature-compensated reference systems
Electronic Signal Processing
Most sensors output:
4–20 mA analog
RS485 Modbus-RTU digital
Relay outputs (via controller)
This allows automation, remote monitoring, and integration with PLCs, IoT routers, and SCADA control systems.
Specifications of Water Sensors
✅ TABLE A — Core Specs
Sensor Type | Measurement Principle | Typical Range | Accuracy |
|---|---|---|---|
Turbidity Sensor (GTS) | 90° scattering, IR absorption, laser optics | 0–400 / 4000 NTU; TSS up to 50,000 mg/L | ±5% FS (laser ±2%) |
Conductivity Sensor (GECS) | Contacting / Quadrupole EC cells | 0 μS–300 mS/cm; TDS to 133,000 ppm | ±1–2% FS |
pH Sensor (GPHS) | Glass electrode electrochemistry | 0–14 pH | ±0.02–0.05 pH |
High-Temp pH Sensor | Reinforced industrial pH | 0–14 pH; up to 90°C; 10 bar | ±0.02 pH |
✅ TABLE B — Materials · Outputs · Installation · Strengths
Sensor Type | Materials | Outputs | Installation | Key Strengths |
|---|---|---|---|---|
Turbidity Sensor (GTS) | ABS, SS316, POM | 4–20 mA, RS485 | Immersion, flow-through, brush | Great for dirty water; self-cleaning; IP68 |
Conductivity Sensor (GECS) | PPS, ABS, PC, SS | RS485, 4–20 mA | Immersion, flow cell | Wide range; temp-compensated; anti-interference |
pH Sensor (GPHS) | Glass, ABS/SS housings | 4–20 mA, RS485 | Immersion, inline | High accuracy; stable output |
High-Temp pH Sensor | SS316 + PTFE | 4–20 mA, RS485 | Immersion | High-pressure & high-temp; IP68 |
Conclusion
Water sensors are indispensable tools for maintaining water quality, ensuring safety, and optimizing industrial processes. The turbidity, conductivity, and pH sensors from your PDFs provide a complete, industrial-grade solution suitable for water treatment, wastewater, aquaculture, environmental monitoring, and chemical processing.
With advanced optical and electrochemical measurement technologies, rugged industrial construction, IP68 protection, and digital PLC/SCADA integration, these sensors deliver real-time, accurate, and stable water-quality analysis for modern automation systems.