Gravity: 7/24 Industrial Analog pH Meter Kit (Arduino, Raspberry Pi)

DESCRIPTION

The DFRobot Gravity Analog pH Meter Kit V2 is an industrial-grade pH sensing solution designed for seamless integration with Arduino, Raspberry Pi, and other 3.3V/5V microcontroller platforms. Ideal for water quality monitoring, hydroponics, aquariums, and IoT applications across Singapore's maker community and industry, it delivers reliable pH measurements across the full 0–14 range via a plug-and-play Gravity analog interface.

Built around a precision BNC pH probe and a dedicated signal conditioning board, it converts the electrochemical probe signal into a clean analog voltage output — ensuring accurate, low-noise readings suitable for both prototyping and continuous industrial deployment.

Attention:

1. The BNC connector and the signal conversion board must be kept dry and clean, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. If it is damp, it needs to be dried.
   
   
2. The signal conversion board cannot be directly placed on a wet or semiconductor surface, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. It is recommended to use the nylon pillar to fix the signal conversion board, and allow a certain distance between the signal conversion board and the surface.
   
   
3. The sensitive glass bubble in the head of the pH probe should avoid touching the hard material. Any damage or scratches will cause the electrode to fail.
   
   
4. After completing the measurement, disconnect the pH probe from the signal conversion board. The pH probe should not be connected to the signal conversion board without the power supply for a long time.
   
   
5. The bottle cap of the probe contains protective liquid (3.3mol/L KCL). Even if the bottle cap is screwed tightly, some protective liquid may still leak around the bottle cap, forming white crystals. But as long as there is still protective liquid in the bottle cap, it will not affect the life and accuracy of the probe. So please use it with confidence. It is recommended that the white crystals be poured back into the protective liquid in the bottle cap.

FEATURES

• Wide pH measurement range: 0–14 pH
• High accuracy: ±0.1 pH at 25°C
• Gravity analog interface — compatible with Arduino, Raspberry Pi, and most 3.3V/5V microcontrollers
• BNC connector for secure and reliable probe attachment
• Wide operating voltage: 3.3V–5.5V — works with both 3.3V and 5V systems
• Signal conditioning board with clean analog output (0–3.0V)
• Suitable for both educational maker projects and continuous industrial water quality monitoring
• Calibration support with standard buffer solutions

APPLICATIONS

• Water quality monitoring for aquariums, ponds, and water treatment facilities
• Hydroponics and precision agriculture pH control
• IoT-connected environmental monitoring stations
• Industrial process control and quality assurance
• School, polytechnic, and university science lab experiments
• Swimming pool and spa water management systems

TECHNICAL DETAILS

Signal Conversion Board (Transmitter) V2

• 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

pH Probe

• Probe Type: Industrial Grade
• Detection Range: 0~14
• Temperature Range: 0~60°C
• Accuracy : ± 0.1pH (25 ℃)
• Response Time: <1min
• Probe Life: 7*24hours >0.5 years (depending on the water quality)
• Cable Length: 500cm

SHIPPING LIST

• 1x pH Probe (Industrial Grade)
• 1x pH Signal Conversion Board V2
• 1x Gravity Analog Sensor Cable
• 2x Waterproof Gasket
• 1x Screw Cap for BNC Connector
• 4x M3 * 10 nylon pillar
• 8x M3 * 5 screws