DFRobot SEN0165 Gravity ORP Sensor Water Quality Monitoring Kit - Analog BNC Probe

The SEN0165 ORP sensor module requires a stable 5V DC power supply, which is compatible with most Arduino boards and other 5V microcontroller systems. The analog output signal is also referenced to this 5V supply, so ensure your microcontroller's analog input can accept a 0-5V range.

Connect the sensor's Gravity PH2.0 3-pin cable to your microcontroller: Red to 5V, Black to GND, and Blue (signal) to an analog input pin (e.g., A0 on Arduino). The sensor outputs an analog voltage directly proportional to the ORP value. Use the `analogRead()` function in your code and apply the appropriate scaling (mV per ADC step) to convert the reading to millivolts.

Yes, for accurate measurements, the sensor requires periodic calibration using standard ORP calibration solutions. The module features a zero calibration button. To calibrate, immerse the probe in a standard solution (e.g., 465mV or 220mV), wait for the reading to stabilize, and press the calibration button to set the reference point. Always follow the probe manufacturer's guidelines for proper calibration procedure and maintenance.

The BNC connector provides a secure, locking connection between the ORP electrode and the sensor module's input. This standard connector ensures a stable, low-noise signal transmission, prevents accidental disconnection, and allows for easy replacement of the probe if needed without soldering or modifying the main circuit board.

The sensor has a response time of ≤20 seconds to reach 90% of the final reading after a step change. It is designed for operation in aqueous environments with a temperature range of 0°C to 70°C, making it suitable for most indoor aquaculture, hydroponic, and laboratory applications. Avoid exposing the electronics to condensation or direct submersion.