Industrial pH Sensor MODBUS-RTU (RS485)

The IP68 RS485 pH Sensor measures 0–14 pH for soil and water monitoring. With MODBUS-RTU RS485 output, IP68 protection, and SenseCAP compatibility, it’s a reliable, low-power solution for accurate long-term data collection.

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The IP68 RS485 pH Sensor measures a range of 0–14 pH and is suitable for soil and water applications such as gardening, hydroponics, and swimming pools. When used with the SenseCAP Data Logger, it enables efficient data collection and management.

This sensor measures hydrogen-ion activity in water-based solutions to determine acidity or alkalinity — key indicators for monitoring soil conditions and water quality.

Built to industry standards, the sensor uses an advanced solid dielectric and a large-area polytetrafluoroethylene (PTFE) liquid junction, which resists clogging and is easy to maintain. The electrode is IP68-rated, while the transmitter is IP65-rated, providing reliable waterproof protection for long-term use in professional environments.

It supports MODBUS-RTU RS485 communication and 0–2V analogue output, making it easy to connect with data loggers, converters, or display systems. Compact, energy-efficient, and cost-effective, this pH sensor offers a dependable solution for continuous monitoring tasks.

Features

• High Performance: High accuracy, fast response, good repeatability
• Universal Protocol: MODBUS-RTU RS485 and 0~2V Analogue Voltage
• Wide-range Power Supply: Can be powered with supply voltage within 3.6V ~ 30V
• Strong Robustness: Suitable to be immersed in soil or water for a long time, anti-corrosion
• Maintenance-Free: A unique junction efficiently improves the problem of junction clogging

Specifications

Range	0 ~ 14pH
Accuracy	± 0.1 pH
Resolution	0.01 pH

General Parameters

Product Model	S-pH-01A
Output Interface	Analogue Voltage 0-2V (Output resistance ~0ohm) RS-485 MODBUS-RTU
Power Supply	3.9-30V/DC 3.9-30V/DC
Power Consumption	35mA@24V DC 35mA@24V DC
Start-up Time	< 2 seconds
pH Measurement	High impedance and isolated input; Range: 0 – 14PH, Resolution: 0.01PH, Accuracy: +/- 0.1PH; Can be used for a solution or semi-solid substrate
Temperature Measurement	Range: -40~80°C, Resolution: 0.1°C, Accuracy: +/-0.5°C
IP Rating	Electrode: IP68; Transmitter: IP65
Operating Temperature	-40℃ ~ 85℃
Installation	Electrode: 3/4’NPT screw threads; Transmitter: Mounting hole
Cable Length	Power and Signal Cable: 2 meters (Customizable) Electrode Cable: 5 meters
Dimension	Electrode: Width*Diameter 160*30mm; 3/4’NPT screw threads Transmitter: 140mm*65mm*50mm
Supplier Code	101990666

Wiring Diagram

Resources

• User Guide
• Manual
• Datasheet
• Calibration

Package Contents

• 1x Industrial pH Sensor with hook-up wires