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Analog pH Sensor Electrode with Amplifier Circuit

Analog pH Sensor Electrode with Amplifier Circuit

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  • This pH Sensor is a scientific instrument used to indicate whether a solution is acidic or alkaline in nature.
  • Accurate pH Measurement: The Robocraze Analog pH Sensor Kit provides precise pH measurement between 0 and 14pH, ideal for testing soil and water quality.
  • Easy to Use: This kit includes a pH probe and sensor board for straightforward signal conditioning, making it suitable for beginners and experts alike.
  • Wide Application: Use it for soil measurements in agriculture, water quality testing, and aquaculture applications.
  • Stable Readings: The sensor offers quick response times (≤ 5 seconds) and stability (≤ 120 seconds) for reliable results.
  • Versatile Compatibility: Interface it with Arduino, Raspberry Pi, and other MCUs for various projects.

Analog pH Sensor Electrode with Amplifier Circuit

The Analog pH Sensor Kit is the ultimate solution for precise pH measurement in soil and water testing applications. With a measurement range of 0 to 14pH, it provides accurate results for a wide range of pH levels.

This kit includes a pH probe and pH Sensor board, making it easy to condition the pH probe's output signal (ranging from 0.5V to 3V). Whether you're a beginner or an experienced user, you'll find this kit user-friendly and efficient.

This pH Sensor applications are diverse, from agriculture to aquaculture and water quality testing. The sensor ensures stable readings with quick response times, ensuring you get reliable data for your projects.

Compatible with popular development platforms like Arduino and Raspberry Pi, this kit offers versatility for various applications. Trust in the Robocraze Analog pH Sensor Kit for accurate and consistent pH measurements.

Few guidelines to use the sensor properly:

  • Make sure the sensor is properly calibrated.
  • Make sure the probe is dipped in deionized distilled water after each reading for at least a minute.
  • Make sure the sensor is given at least a few minutes to settle down in its reading after dipping it in a solution.

Here is the link to the pH Sensor Blog for a detailed explanation.


  • Can be used to determine the PH level in the water
  • Can be used for soil measurements in agriculture
  • Can be used in Aquaculture

Pinout Of PH Probe Sensor:

Pinout Of PH Sensor

  • TO – Temperature output
  • DO – 3.3V Output (from ph limit pot)
  • PO – PH analog output ==> Arduino A0
  • Gnd – Gnd for PH probe (can come from Arduino GND pin) ==> Arduino GND
  • Gnd – Gnd for the board (can also come from Arduino GND pin) ==> Arduino GND
  • VCC – 5V DC (can come from Arduino 5V pin) ==> Arduino 5V pin
  • POT 1 – Analog reading offset (Nearest to BNC connector)
  • POT 2 – PH limit setting

Package Includes:

  • 1 x pH Probe
  • 1 x pH sensor board


Operating voltage 5±0.2V (AC - DC)
Working current 5-10mA
The detection concentration range PH0-14
The detection range of temperature
0-60 centigrade
Response Time 
≤ 5S
Stability time
≤ 120S
Power consumption
≤ 0.5W
42mm x 32mm x 20mm

Shipping & Returns

  • All orders confirmed before 3 pm IST are shipped on the
    same day, barring rare pickup delays on holidays or disturbances
  • Delivery time in Metro cities is 1-3 days, Others it is
    3-7 days. It varies based on location, reliant on courier services
  • Return window: 7 days from receipt unless stated
    otherwise. No refunds/replacements after
  • Returns only for non-working/damaged products are accepted
  • Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
  • Refunds are processed within 3-4 working days post inspection and approval.

For more details, please check our Shipping and Return Policy

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1. What is pH sensor used for?

A pH sensor is a type of device used to measure and monitor the acidity or alkalinity in liquids. It has many applications, including water analysis, wastewater treatment, swimming pools maintenance and food production quality control. The sensors are typically inserted into liquid media for direct point-measurement readings; they can also be connected remotely via cables or Wi-Fi signals for continuous monitoring without physical contact with the medium being tested. With its high accuracy measurements across wide ranges of temperature levels and dynamic response times, it is an extremely useful tool that ensures exact readings regardless of environmental conditions. Ideal for both industrial and commercial use alike – from agriculture research projects to retail outlets such as restaurants - the versatile nature of today's pH sensing devices makes them essential assets within multiple industries worldwide.

2. How to calibrate the pH sensor?

The pH sensor can be calibrated by shorting the Vin and GND terminals at the probe side, thereby emulating a signal of pH 7. The onboard potentiometer near the BMC probe connector can then be adjusted to give an output of 2.5V between the Po and GND pin. Alternatively, you can also use analogRead() on the Arduino to calibrate it to 2.5V. For detailed instructions, please check out our pH sensor blog linked below.

3. Is a pH sensor input or output?

A pH sensor is an input device used to measure the hydrogen-ion activity in a solution. It measures and records changes in acidity or alkalinity of samples, such as water and soil. The measurement results are outputted digitally for further analysis from computers, PLCs (Programmable Logic Controllers), SCADA systems (Supervisory Control And Data Acquisition) and other equipment that require accurate data on environmental conditions. This reliable sensing technology ensures accuracy across different environments when recording liquid levels with minimal error margin—a crucial factor for quality control applications like medicine production lines or laboratory testing procedures. In short, this versatile tool can be applied anywhere where monitoring of solutions’ pH values is needed: it efficiently inputs received information without compromising its precision while providing efficient outputs when required by digital devices to drive decision-making processes accurately!