pH Probe and Sensor Board, 0-14 pH

Measure the pH value in liquids using this pH measurement kit. The kit can easily be used with any 5 V microcontroller like Arduino board and consists of a pH probe and a sensor board.

The sensor board is equipped with a temperature sensor for temperature compensation during pH value calculation. The temperature can be read on pin T0 using an analog input of e.g. your Arduino board. The module has also two potentiometers: One for setting the sensor offset (next to the BNC connector) and a second one for setting a threshold for the D0 pin. D0 is set to HIGH as soon as the pH threshold is passed. The offset is by default set to 0 V when a pH value of 7 is measured which means that acidic solutions cause a negative voltage. Using the offset trimmer you can set the voltage range to be between 0 and 5 V - which again equals 0 to 14 pH.

Pinout:

• T0: Temperature, analog output
• D0: 3,3V output when measured pH value is higher than the set threshold
• P0: pH value, analog output
• GND: Probe ground
• GND: Sensor board ground
• VCC: 5V operating voltage

Technische Daten:

• Operating Voltage: 5V
• Current Draw: up to 10 mA
• Temperature Range: 0 - 60˚C
• pH Range: 0 - 14
• Response Time: < 1 min
• Accuracy: ± 0.2 PH