Gravity: 7/24 Industrial Analog pH Meter Kit for Arduino

The Gravity 7/24 Industrial Analog pH Meter Kit is designed for continuous, long-term liquid monitoring in aquaculture, water treatment, and environmental sensing projects. Equipped with an industrial-grade electrode offering up to one year of 24/7 operation, it pairs directly with Arduino microcontrollers via a plug-and-play analog interface. It provides reliable, linear readings across the 0 to 14 pH range with an accuracy of ±0.1 pH.

Continuous online pH monitoring

Built for 24/7 continuous operation, this industrial probe delivers a service life of up to 8,760 hours (one year). It features a linear output voltage across the complete 0 to 14 pH measurement range with an accuracy of ±0.1 pH at 25 °C.

Rugged electrode design

The probe uses a low-impedance glass membrane that delivers rapid response times under one minute and high thermal stability from 0 to 60 °C. Its Ag/AgCl gel electrolyte reference system and anti-clogging ring PTFE membrane resist contamination and eliminate alkali errors.

Simple microcontroller integration

Operating on a 5.00V supply, the 43mm x 32mm interface board connects the BNC probe directly to an analog input pin using a standard 3-pin PH2.0 cable. The board includes an onboard power LED and a gain adjustment potentiometer for calibration.

Probe storage and care

The electrode must be kept wet in a 3.3mol/L KCl solution when not in use to maintain accuracy and probe life. Any white powder on the packaging is non-hazardous KCl salt crystallisation from the protective cap remnant.

Included kit components

The package includes one industrial-grade pH electrode with a BNC connector, one analog pH processing board, and one 3-pin analog connection cable.

Downloads & documentation

• Product wiki (DFRobot)