Gravity: Analog pH Sensor / Meter Kit for Arduino

SKU:SEN0161 Brand:DFRobot Reward Points: 295
In Stock
Topic: Arduino Gravity
Quantity Based Price
  • 2-4$29.00
  • 5-9$28.20
  • 10+$27.00
* Model:
Expected Restock Date: [[restockDate]]


You may check the latest version - Gravity: Analog pH Sensor/Meter Kit V2 to meet your requirements and Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.

Need to measure water quality and other parameters but haven't got any low-cost pH meter? Find it difficult to use with Arduino? DFRobot analog pH meter, specially designed for Arduino controllers and has a convenient and practical "Gravity" connector and a bunch of features. Instant connection to your probe your Arduino to get pH measurements at ± 0.1pH (25 ℃). For most hobbyists, this great accuracy range and its low cost make this a great tool for biorobotics and other projects! It has an LED that works as the Power Indicator, a BNC connector, and a PH2.0 sensor interface. To use it, just connect the pH sensor with the BND connector, and plug the PH2.0 interface into the analog input port of any Arduino controller. If pre-programmed, you will get the pH value easily. Comes in a compact plastic box with foams for better mobile storage.

Build your own PH meter gadget or a water monitoring station for your water tanks. This and our other water sensor devices could make for the ultimate water control device. Use it for your aquaponics or fish tanks or other materials that need measurements. 

This is a laboratory probe, it can't be immersed in the liquid for too long time. You can check here for the whole Analog pH Sensor / Meter Pro Kit For Arduino or a spare Industrial Probe as a replacement

Analog pH Sensor / Meter Kit For Arduino Connection

What is pH?  

“pH stands for the power of hydrogen, which is a measurement of the hydrogen ion concentration in the body. The total pH scale ranges from 1 to 14, with 7 considered to be neutral. A pH less than 7 is said to be acidic and solutions with a pH greater than 7 are basic or alkaline.” 

Note: Buffer solutions are not included.
After you received your package! You may found some white particles on the protection foam which is the KCl crystallization from the cap. Please don't worry about the crystallization in the packing box, that's normal. Actually, since the transportation restriction on liquid, we have poured out the KCL3N solution in the cap, the slight crystallization in the packing box should be leaked since the remnant. Anyway, once you received the probe, you should store it in KCL3N solution, you can not leave it in dry circumstances.


  • Water quality testing
  • Aquaculture


  • Module Power: 5.00V
  • Module Size : 43 x 32mm(1.69x1.26")
  • Measuring Range :0 - 14PH
  • Measuring Temperature: 0 - 60 ℃
  • Accuracy : ± 0.1pH (25 ℃)
  • Response Time: ≤ 1min
  • pH Sensor with BNC Connector
  • pH2.0 Interface (3-foot patch )
  • Gain Adjustment Potentiometer
  • Power Indicator LED


Project 1. Arduino Project: pH sensor Working, application & Calibration "Water Quality Monitoring"

Introduction: This tutorial is about how to use the pH sensor with Arduino and find the pH value of different liquids “Water, Milk and Cold rink”, and display the pH value on the serial monitor.

Project 2. IoT based Water Quality monitoring using Arduino, pH Sensor, Nodemcu ESP8266 & Blynk

Introduction: This project will show how to make an IoT based water quality monitoring system using Arduino, pH Sensor, Nodemcu esp8266 wifi module and Blynk Application.

Project 3. How to connect pH sensor with arduino

Introduction: This project shows how to connect pH sensor with arduino.

Project 4. Water Quality Monitoring Using MKR1000 and ARTIK Cloud

Introduction: Water quality data monitoring for swimming pools, fish aquarium and more!

Project 5. How to Make An Automatic Water Changing System

Introduction: This simple system detects water quality through simulation Gravity: Analog pH Sensor / Meter Kit For Arduino and Gravity: Analog Turbidity Sensor For Arduino, and supplies and drains water through the submerged pump and solenoid valve.


Shipping List

  • Gravity: Analog pH Sensor / Meter Kit For Arduino x1
  • pH probe (BNC connector)  x1
  • pH sensor circuit board       x1
  • Analog cable  x1





Gravity: Analog pH Sensor / Meter Kit for Arduino

In Stock
  • 2-4$29.00
  • 5-9$28.20
  • 10+$27.00