DFRobot Gravity 7/24 Industrial Analog pH Meter Kit for Arduino & Raspberry Pi Project

DFRobot Gravity 7/24 Industrial Analog pH Meter Kit for Arduino & Raspberry Pi Project

The Gravity: 7/24 Industrial Analog pH Meter Kit (SEN0169-V2) is a professional-grade water quality monitor designed for continuous, real-time pH measurement in demanding environments.

This upgraded version significantly improves precision and user experience compared to its predecessor. The kit includes an industrial-grade pH probe that supports 24/7 monitoring with a lifespan exceeding 4380 hours, ensuring consistent performance even in harsh conditions.

The onboard voltage regulator chip supports a wide voltage supply range of 3.3V to 5.5V, making this industrial pH sensor compatible with both 5V and 3.3V main control boards such as Arduino, Raspberry Pi, and LattePanda. Its hardware-filtered output signal delivers low jitter for stable readings.

What sets this Arduino pH meter apart is its exceptional accuracy of ±0.1 pH at 25°C and user-friendly calibration process. The software library adopts a two-point calibration method that can automatically identify standard buffer solutions (4.0 and 7.0), making the setup process simple and convenient.

The industrial pH combination electrode features a sensitive glass membrane with low impedance, providing fast response times and good thermal stability.

With its linear output voltage across the 0 to 14 pH range and excellent anti-pollution performance, this continuous pH measurement system is ideal for long-term online detection in applications such as aquaponics, aquaculture, chemical monitoring, and environmental water testing.

Features

• Supports 24/7 continuous monitoring with lifespan exceeding 4380 hours.
• High measurement accuracy of ±0.1 pH at 25°C for precise readings.
• Two-point calibration using standard buffer solutions (4.0 and 7.0).
• Wide operating voltage range of 3.3V to 5.5V for versatile compatibility.
• BNC connector and Gravity interface for easy plug-and-play setup.
• Industrial pH probe with sensitive glass membrane and low impedance.
• Measurement range of 0 to 14 pH for comprehensive testing capabilities.

DFRobot Gravity 7/24 Industrial Analog pH Meter with Arduino Connection Diagram

Important Notes:

• Keep the BNC connector and signal conversion board dry and clean. Moisture can lower the input impedance, causing inaccurate readings. If damp, dry them before use.
• Do not place the signal conversion board on wet or conductive surfaces. This may affect accuracy. Use nylon standoffs to mount it, maintaining a gap between the board and the surface.
• The glass tip of the pH probe is delicate. Avoid contact with hard surfaces. Scratches or cracks can damage the probe.
• After use, disconnect the pH probe from the signal board. Do not leave it connected when the board is powered off for long periods.
• The probe cap contains protective liquid (3.3mol/L KCL). Some leakage and white crystal formation around the cap is normal. As long as there’s still liquid inside, the probe will remain accurate. You can return the crystals to the cap if needed.