DFRobot Gravity Analog pH Sensor Pro Kit V2 Industrial - BNC Probe w/ 500cm Cable

The sensor kit provides a 0 to 3.0V analog output voltage, linearly corresponding to the 0-14 pH measurement range. This standard analog signal can be directly read by the ADC (Analog-to-Digital Converter) pin of any microcontroller, such as an Arduino or Raspberry Pi, for straightforward integration and calibration.

The onboard voltage regulator accepts a wide input range of 3.3 to 5.5V DC, making it fully compatible with both 5V systems (like most Arduinos) and 3.3V logic platforms (like ESP32, Raspberry Pi, and STM32). Simply connect the red wire to your board's 3.3V or 5V pin, the black wire to GND, and the blue wire to an analog input pin.

Calibration uses a two-point method supported by the DFRobot software library. You will need standard pH buffer solutions, typically pH 4.01 and pH 7.00. The library can automatically identify these buffers. Follow the calibration procedure by immersing the probe in each solution sequentially and recording the stable ADC values to establish an accurate calibration curve.

The industrial-grade combination electrode has a typical functional lifespan of approximately 6 months (0.5 years) under continuous use, though this is highly dependent on the application's water quality, temperature, and maintenance. The PTFE reference junction resists clogging to prolong life. For optimal performance, regular cleaning and storage in a proper storage solution or pH 4 buffer is recommended.