Gravity: Lab Grade Analog pH Sensor Kit for Arduino / Raspberry Pi (with Calibration Solutions)
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Description
The Gravity Lab Grade Analog pH Sensor Kit measures solution acidity and alkalinity across a 0 to 14 pH range with an accuracy of ±0.1 at 25°C. Designed for 3.3V and 5V microcontrollers like Arduino and Raspberry Pi, it is an accessible solution for students, educators, and makers building water quality monitoring projects.
Wide voltage compatibility and filtered output
The onboard voltage regulator accepts a supply voltage between 3.3V and 5.5V, making it directly compatible with 3.3V and 5V development boards. Its hardware-filtered analog output delivers stable readings with low signal jitter.
Automated two-point software calibration
The companion software library uses a two-point calibration routine that automatically identifies standard 4.0 and 7.0 buffer solutions. This plug-and-play routine simplifies setup and ensures dependable readings across educational and hobbyist experiments.
Laboratory probe specifications and use
Equipped with a standard BNC connector and a 100cm cable, the laboratory-grade probe operates over a temperature range of 5°C to 60°C. It is designed for spot testing and educational lab use rather than continuous, long-term industrial immersion.
Modular design for water monitoring
Featuring a standard Gravity PH2.0-3P interface and a compact 42mm by 32mm footprint, the board integrates easily into custom enclosures. It is ideally suited for aquaponics, aquaculture, and DIY multi-parameter environmental water quality testers.
Complete starter kit contents
The package includes the laboratory-grade pH probe, V2 signal conversion board, Gravity analog cable, and mounting hardware. It also provides two pairs of pH 4.0 and pH 7.0 standard buffer solutions for immediate calibration out of the box.
Video
Downloads & documentation
Specifications
| 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 | Internal Resistance: Probe Life: >0.5 years (depending on the frequency of use) |
| Cable Length | 100cm |
In the box
| pH Probe(Laboratory Grade) | 1 |
| pH Signal Conversion Board | 1 |
| Gravity Analog Sensor Cable | 1 |
| pH Standard Buffer Solution 4.0 | 2 |
| pH Standard Buffer Solution 7.0 | 2 |
| Waterproof Gasket | 2 |
| Screw Cap for BNC Connector | 1 |
| M3 * 10 nylon pillar | 4 |
| M3 * 5 screws | 8 |
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