DFRobot - Gravity: Analog Water Pressure Sensor

This Gravity analog water pressure sensor adds pressure readings to Arduino projects for household plumbing, garden irrigation, farm water systems, and tanks. A 0–1.6 MPa measurement range and 0.5–4.5V linear analog output provide a straightforward way to track pressure changes with a compatible controller. The Gravity 3-pin interface simplifies electrical connection, while a G1/4 thread and mounted G1/2 adapter support integration into suitable pipe fittings. Combined with a solenoid valve and other sensors, this water pressure sensor provides pressure feedback for custom water monitoring and control systems using non-corrosive media.

0–1.6 MPa Pressure Readings with Linear Analog Output

This analog water pressure sensor converts pressure into a 0.5–4.5V linear voltage signal, making pressure changes available to a controller for display, logging, or project-defined control rules. The 0–1.6 MPa range supports pressure measurements in suitable water pipes and tanks, and a response time below 2.0 ms allows the sensor output to respond quickly to pressure changes. Arduino examples in the Product Wiki demonstrate reading the signal and calculating pressure.

Gravity 3-Pin Connection for Easy Arduino Setup

This water pressure sensor combines signal, power, and ground in a Gravity 3-pin connection, reducing the wiring work needed to add pressure sensing to a project. With a compatible DFRobot Gravity IO Expansion Shield, the sensor cable plugs directly into the controller interface. A standard 5V supply and documented Arduino connection diagram provide a clear starting point for building a pressure display or integrating pressure feedback into a smart water system.

Threaded Installation with an Included G1/2 Adapter

This water pressure sensor has a G1/4 thread and ships with a mounted G1/2-to-G1/4 adapter, providing two fitting options for compatible installations. The 1m cable gives flexibility when positioning the controller near the measurement point. An IP68 waterproof rating supports projects exposed to water, while the specified medium compatibility covers non-corrosive liquids and gases. These mechanical features make the sensor practical for pipe, tank, and irrigation pressure sensing projects.

Connection Diagram (Arduino)

• 0–1.6 MPa measurement range for pressure sensing in suitable water systems
• 0.5–4.5V linear analog output with a standard 5V supply
• Gravity 3-pin interface for convenient connection to compatible Arduino expansion shields
• G1/4 thread with a mounted G1/2-to-G1/4 adapter included
• IP68 waterproof rating
• Response time below 2.0 ms
• Suitable for non-corrosive liquids and gases
• 1m cable for flexible placement near the controller

• Medium: liquid/gas without corrosion
• Wiring: Gravity-3Pin (Signal-VCC-GND)
• Pressure Measurement Range: 0~1.6 Mpa
• Input Voltage: +5 VDC
• Output Voltage: 0.5~4.5 V
• Measurement Accuracy: 0.5%~1%FS (0.5%, 0~55°C)
• Threadably: G1/4
• Adapter: G1/2 to G1/4
• Waterproof level: IP68
• Operating Temperature: -20~85°C
• Response Time:
• Quiescent Current: 2.8 mA
• Normal Operating Pressure: ≤2.0 Mpa
• Damaged Pressure: ≥3.0Mpa
• Service Life: 10’000’000 times
• Line length: 1m

• Gravity: Analog Water Pressure Sensor x1
• G1/2 to G1/4 Connector (mounted) x1