pH Electrode Probe with Analog Sensor Module - Liquid pH Detection for Arduino and ESP32

pH Electrode Probe with Analog Sensor Module - Liquid pH Detection for Arduino and ESP32

Measure the pH value of water, nutrient solutions, hydroponics, aquarium water, and other liquids with this complete pH sensing kit. Includes a glass pH electrode probe with BNC connector cable and a green analog signal conditioning PCB that amplifies and conditions the weak electrode signal into a stable 0-5V analog voltage readable by any Arduino, ESP32, or microcontroller ADC input. Two onboard trimpots allow offset and gain calibration for accurate pH readings.

What is Included

• 1x Glass pH electrode probe with protective cap
• 1x BNC connector cable (probe to module)
• 1x pH analog signal conditioning PCB module (green)

Key Features

• Glass pH electrode probe - accurate pH measurement across pH 0-14 range
• BNC connector - standard laboratory-grade probe connection to the module
• Dual op-amp signal conditioning - amplifies the weak millivolt electrode signal reliably
• Two calibration trimpots - offset and gain adjustment for precise pH calibration
• Analog voltage output (0-5V) - directly readable by Arduino, ESP32, and any ADC
• 5-pin header output - VCC, GND, TO (analog out), DO (digital out), LED
• Compact green PCB - easy to mount in project enclosures
• Compatible with pH 4.0 and pH 7.0 buffer calibration solutions (not included)

Specifications

• Measurement Range: pH 0 - 14
• Probe Type: Glass pH electrode
• Probe Connector: BNC
• Module Supply Voltage: 5V DC
• Analog Output: 0 - 5V (proportional to pH)
• Output Header: 5-pin 2.54mm (VCC, GND, TO, DO, LED)
• Calibration: Two trimpots (offset and gain)
• PCB Color: Green
• Calibration Solutions Required: pH 4.0 and pH 7.0 buffer (not included)

How to Calibrate

• Submerge the probe in pH 7.0 buffer solution and adjust the offset trimpot until the output reads the correct voltage for pH 7
• Then submerge in pH 4.0 buffer and adjust the gain trimpot to set the correct slope
• Map the output voltage to pH value in your Arduino or ESP32 code using the two-point calibration

Perfect For

• Hydroponics and Aquaponics pH Monitoring
• Aquarium and Fish Tank Water Quality Monitoring
• Arduino and ESP32 Water Quality Sensor Projects
• Soil pH Measurement with Liquid Sample
• Industrial and Agricultural Water Treatment Monitoring
• University Chemistry and Environmental Science Projects

Order now and add accurate liquid pH measurement to your Arduino, ESP32, or embedded water quality monitoring project.