Industrial pH Meter/ Sensor MODBUS-RTU RS485 & 0~2V Analog Voltage (S-pH-01A) V2.0
This industrial-grade MODBUS-RTU RS485 pH meter/sensor features ATC, low-power-consumption, high integration. It can be widely used in monitoring pH levels in soil and water applications such as agriculture, gardening, horticulture, swimming pools, scientific experiments, and other environmental monitoring scenarios.
Version 1 of this pH sensor supports RS485 protocol and 0~2V Analog Voltage, which is now retired, and replaced by this current one: Version 2, supporting RS485 protocol and 0~2V analog voltage.
Please send an email to sensecap[at]seeed[dot]cc to request any technical support for this product.
High performance: high accuracy, fast response, good repeatability
Universal protocol: MODBUS RS-485 or 0~2V Analog Voltage
Wide-range power supply: 3.6V ~ 30V
Robustness: suitable to be immersed in soil or water for a long time
Maintainance-Free: advanced junction design, no clogging
Durable: anti-corrosion, automatic temperature compensation
User-friendly: Easy to install and integrate
A pH meter measures the hydrogen-ion activity in water-based solutions, indicating its acidity or basicity expressed as pH. (Wikipedia: pH Meter). pH level is an important indicator in many scenarios, especially in monitoring soil conditions and water quality. A pH sensor is widely used in farming, gardening, hydroponics, aquaponics, swimming pools and spas, sewage treatment, education, environmental monitoring, and many other applications.
|Range||0 ~ 14pH|
|Accuracy||± 0.1 pH|
|Output Interface||Analog Voltage 0-2V (Output resistance ~0ohm)||RS-485 MODBUS-RTU|
|Power Consumption||[email protected] DC||[email protected] DC|
|Start-up time||< 2 seconds|
High impedance and isolated input;
Range: 0 - 14PH,
Accuracy: +/- 0.1PH;
Can be used for a solution or semi-solid substrate
Range: - 40~80°C,
|Operating Temperature||-40℃ ~ 85℃|
Electrode: 3/4"NPT screw threads;
Transmitter: Mounting hole
Power and Signal Cable:2 meters (Customizable)
Electrode Cable: 5 meters
Electrode: Width*Diameter 160*30mm; 3/4"NPT screw threads
Agriculture: greenhouse, aquaponics, hydroponics, and crop Plantation, etc.
Animal Husbandry: pasture, grassland, and meadow
Forestry and Horticulture
Swimming Pools and Spas
Other environmental monitoring scenarios
Please refer to the user manual for more details about the wiring diagram.
|Q:||Is it factory calibrated? How to calibrate?|
Yes, the device is fully calibrated prior to shipment from the factory.
About calibration, please refer to the document:
|Q:||Why is the temperature output from the sensor inaccurate?|
|PH electrode itself has no temperature sensor, the temperature is the plate temperature sensor; If necessary, you can access the NTC (10K, 3950) thermistor temperature sensor.|
|Q:||Can the sensor be used in soil? How to install?|
Yes, Yes, the principle is still to measure the pH in the soil moisture, so it will be affected by the soil moisture, and the drier the soil, the greater the error.
Installation method: Dig out a pit, fill the pit with some water, stir the soil into a slurry, and then place the sensor glass probe. Be careful not to overexert yourself and avoid hard objects such as stones, otherwise the probe will be damaged.