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: 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. 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. 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. 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. 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