The Analog pH Sensor Electrode with Amplifier Circuit is a precision sensing solution designed to measure the acidity or alkalinity of liquids. It combines a glass pH probe with a dedicated signal conditioning amplifier that converts the very small electrode signal into a stable analog voltage readable by microcontrollers. This module is widely used in water quality monitoring, hydroponics, aquaculture, laboratory experiments, and industrial process control.
Core Sensor Specifications
• Sensor Type: Analog pH measurement system
• Measurement Parameter: pH value of liquids
• Sensing Element: Glass pH electrode
• Output Type: Analog voltage
Electrical & Interface
• Operating Voltage: 5 V DC
• Output Signal: Analog (typically 0–3 V or 0–5 V, module dependent)
• Interface Pins: VCC, GND, AO
• Amplifier Type: High-impedance pH signal conditioning circuit
• Connector: BNC connector for pH electrode
Performance Characteristics
• Measurement Range: pH 0 – 14
• High input impedance for accurate sensing
• Stable and low-noise output after calibration
• Response time depends on probe condition and liquid
Physical Characteristics
• Module Type: PCB-mounted amplifier board
• Probe Type: Standard laboratory-grade pH electrode
• Cable Length: Long probe cable for immersion testing
• Designed for bench-top and field applications
Compatibility
• Arduino Uno / Nano / Mega
• ESP32 / ESP8266 (ADC compatible range)
• Raspberry Pi (with external ADC)
• Water quality monitoring systems
• IoT and automation platforms
Key Advantages
• Accurate analog pH measurement
• Easy integration with microcontrollers
• Standard BNC electrode interface
• Suitable for continuous monitoring
Technical Insights
• Requires calibration using pH buffer solutions
• Temperature affects pH readings (manual compensation required)
• Probe must be kept moist when not in use
• Analog output must match ADC voltage range
Applications
• Water quality monitoring
• Hydroponics and aquaponics systems
• Swimming pool and aquarium testing
• Laboratory and educational experiments
• Industrial liquid process control
Pro Tip
• Always calibrate before first use and periodically
• Store electrode in proper storage solution
• Rinse probe with distilled water after measurements
• Avoid touching the glass tip to prevent damage
Package Includes
• 1 × pH electrode probe
• 1 × pH amplifier circuit module