Gravity: Lab Grade Analog pH Sensor Kit for Arduino / Raspberry Pi (with Calibration Solutions)
- $37.50 3+ items
- $35.50 5+ items
- $33.50 10+ items
Introduction
DFRobot Gravity: Analog pH meter V2 is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity. DFRobot ph sensor is commonly used in various applications such as aquaponics, aquaculture, and environmental water testing.
As an upgraded version of pH meter V1, this product greatly improves the precision and user experience. The onboard voltage regulator chip supports the wide voltage supply of 3.3~5.5V, which is compatible with the 5V and 3.3V main control boards. The output signal filtered by hardware has low jitter. The software library adopts the two-point calibration method, and can automatically identify two standard buffer solutions (4.0 and 7.0), so simple and convenient.
The sensor can be easily connected to most popular microcontrollers (such as Arduino), with its Arduino library, you can quickly build a pH meter, plug and play.
DFRobot provides a variety of water quality ph analog sensor products, uniform size, and interface, not only meeting the needs of various water
quality measuring but are also suitable for the DIY multi-parameter water quality tester.
The pH is a value that measures the acidity or alkalinity of the solution. It is also called the hydrogen ion concentration index. The pH is a scale of hydrogen ion activity in the solution. The pH has a wide range of uses in medicine,
chemistry, and agriculture. Usually, the pH is a number between 0 to 14. Under the thermodynamic standard conditions, pH=7, which means the solution is neutral; pH<7, which means the solution is acidic; pH>7, which means the
solution is alkaline.
The Gravity: Analog pH Sensor / Meter Kit (SEN0161) and Gravity: Analog pH Sensor/Meter Kit V2 (SEN0161-V2) are intended for testing inaboratory environments only, and the probes are subject todata drift after extended measurements. If you need to measure a solution for an extended period oftime, we recommend using the Gravity: 7/24 Industrial Analog pH Meter Kit for Arduino or Gravity: 7/24 Industrial Analog pH Meter Kit (Arduino, Raspberry Pi).
Features
- 3.3~5.5V wide voltage input
- Hardware filtered output signal, low jitter
- Gravity connector and BNC connector, plug and play, no welding
- The software library supports two-point calibration and automatically identifies standard buffer solution
- Uniform size and connector, convenient for the design of mechanical structures
Specification
- Supply Voltage: 3.3~5.5V
- Output Voltage: 0~3.0V
- Probe Connector: BNC
- Signal Connector: PH2.0-3P
- Measurement Accuracy: ±0.1@25℃
- Dimension: 42mm*32mm/1.66*1.26in
- Probe Type: Laboratory Grade
- Detection Range: 0~14
- Temperature Range: 5~60°C
- Zero Point: 7±0.5
- Response Time: <2min
- Internal Resistance: <250MΩ
- Probe Life: >0.5 years (depending on the frequency of use)
- Cable Length: 100cm
Shipping List
- pH Probe(Laboratory Grade) x1
- pH Signal Conversion Board x1
- Gravity Analog Sensor Cable x1
- pH Standard Buffer Solution 4.0 x2
- pH Standard Buffer Solution 7.0 x2
- Waterproof Gasket x2
- Screw Cap for BNC Connector x1
- M3 * 10 nylon pillar x4
- M3 * 5 screws x8
Documents
Resource
Review
May 10, 2025
This is an amazing product
Nov 09, 2024
The sensor itself is great and I can take good measurements with it, but the buffer solutions that should help you calibrate it are pretty off, even if you shake the flask a lot. After calibrating it with my own solution it works great. Not giving 5 stars just because I expected the buffer solutions to actually work.
Mar 15, 2024
Thank You DFROBOT i receive my order last day and i am verry happy