DFRobot Gravity SEN0169-V2 Industrial Analog pH Meter Pro Kit (±0.1 pH, 0–14 pH, 3.3–5.5V, Arduino/Raspberry Pi)

Overview

The DFRobot SEN0169-V2 Gravity: Analog pH Sensor / Meter Pro Kit V2 is an industrial-grade pH measurement kit designed for 24/7 (7×24) water-quality monitoring. It delivers ±0.1 pH accuracy at 25 °C, supports two-point calibration (pH 4.00 & 7.00 buffers), and features a robust industrial pH probe plus an upgraded signal conversion board (transmitter). With 3.3–5.5 V supply, 0–3.0 V analog output, BNC probe connector, and Gravity PH2.0-3P interface, it integrates cleanly with Arduino, Raspberry Pi (via ADC), LattePanda, and other controllers. A 5 m probe cable and plug-and-play wiring simplify deployment for aquaculture, hydroponics, labs, and environmental monitoring.

Key Features

• Industrial probe built for continuous 7×24 operation; typical life >0.5 year (depends on water quality)

• ±0.1 pH accuracy @ 25 °C; two-point calibration with standard buffers (4.00 & 7.00)

• Wide supply: 3.3–5.5 V; analog output 0–3.0 V with hardware filtering for low jitter

• Plug-and-play: BNC probe connector + Gravity PH2.0-3P signal header; no soldering required

• Uniform board size/connector for easy mechanical design; compatible with Arduino/Raspberry Pi/LattePanda

• Upgraded transmitter for improved stability and accuracy

Specifications

Signal Conversion Board (Transmitter) V2

pH Probe (Industrial Grade)

Attention (Installation & Use)

1. Keep the BNC connector and conversion board dry/clean; moisture lowers input impedance and causes errors. Dry if damp.

2. Do not place the conversion board directly on wet or semiconductive surfaces; mount with nylon pillars and allow clearance.

3. Protect the probe’s glass bulb from impact/scratches.

4. Disconnect the probe from the board when powered off; avoid long periods connected without power.

5. The probe cap contains 3.3 mol/L KCl. White crystals may appear around the cap; as long as solution remains inside, accuracy and life are unaffected. Return crystals to the cap solution.

Documents

• DFRobot Gravity: Analog pH Meter Pro V2 Product Wiki

• Liquid Sensor Selection Guide

What’s in the Box

• Industrial-grade pH Probe ×1

• pH Signal Conversion Board V2 ×1

• Gravity Analog Sensor Cable ×1

• Waterproof Gasket ×2

• Screw Cap for BNC Connector ×1

• M3 × 10 Nylon Pillar ×4

• M3 × 5 Screws ×8

Notes: For Raspberry Pi, use an external ADC to read the 0–3.0 V analog output. Calibrate with fresh pH 4.00 and pH 7.00 buffers at operating temperature for best accuracy.

Details

DFROBOT Gravity pH Meter V2.0 connected to DFROBOT DFROduino UNO v3.0 board via analog input, measuring pH in liquid using probe submerged in beaker.

Arduino Connection Diagram