Gravity: Lab Grade Analog pH Sensor Kit for Arduino

Low-cost analog pH sensor kit with ±0.1 pH accuracy and Gravity interface. Suited for water quality monitoring and aquaponics. Includes sensor probe and signal conditioning board.

Logical pinout · physical placement not verified

-
Type · Ground
+
Type · Power
A
Type · Signal
BNC
Type · Signal

Pin	Type
-	Ground
+	Power
A	Signal
BNC	Signal

Logical pinout · physical placement not verified

Pin details

4 connections

-
Ground
+
Power
A
Signal
BNC
Signal

Start wiring

Analog · UART · 3.3 – 5 V · Gravity

Confirm the data interface matches your host board.

Module pins: +, -, A, BNC. Schematik maps them to your board in the app.

Soil & liquid

80 other options

Capacitive soil probes, pH/EC/TDS chemistry kits, RS485 water-quality sensors, contact and non-contact level sensors, and turbine flow meters — about 80 listings for anything involving soil or liquid sensing.

View all 80

Related groups

4 groups

Biometrics

UART/I2C fingerprint modules, MAX30102 PPG breakouts, and analog ECG/EMG front-ends for access control and hobby biometric sensing.

Sensors · Biometric sensors · 26 parts

Cameras

Pi CSI modules, USB cameras, MCU-class OV2640/OV5640 boards, on-camera AI like HuskyLens and OpenMV, and thermal or ToF imagers — over 130 listings across very different pipelines.

Sensors · Cameras & vision · 141 parts

Power monitors

INA-series I2C monitors, Hall-effect sensors like the ACS723 and Gravity 20A/50A boards, and non-invasive CT clamps for everything from 3.3V rail telemetry to mains current sensing.

Sensors · Current & voltage · 25 parts

Distance sensors

About 180 listings spanning VL53-series ToF breakouts, HC-SR04 and MaxSonar ultrasonics, 360° triangulation LiDARs, IR proximity sensors, 24GHz mmWave presence detection and laser break-beam sensors.

Sensors · Distance sensors · 177 parts