DFRobot Gravity Analog Water Pressure Sensor Module
DFRobot Gravity Analog Water Pressure Sensor
Overview
Analog water pressure measurement sensor
Part of DFRobot Gravity series (plug-and-play)
Designed for liquid pressure detection in pipes, tanks, and systems
Compatible with Arduino, ESP32, Raspberry Pi
Working Principle
Uses piezoresistive pressure sensing element
Water pressure applies force on internal diaphragm
Causes change in electrical resistance
Internal circuit converts it into analog voltage output (linear)
Works like a pressure-to-voltage converter
Key Specifications
Pressure Range: 0 1.6 MPa ( trong> 5V DC
Output Voltage: 0.5V 4.5V (linear)
Accuracy: 0.5% 1% FS
Response Time: < 2 ms
Current Consumption: ~2.8 mA
Thread Size: G1/4 (with G1/2 adapter)
Waterproof Rating: IP68
Operating Temp: -20C to 85C
Lifetime: 10 million cycles
Pin Configuration (Gravity 3-Pin)
Signal Analog output (0.54.5V)
VCC 5V
GND Ground
Features
High durability & long life
Fast and stable readings
Applications
Smart water systems
Pipeline pressure monitoring
Water tank level estimation
Agriculture irrigation systems
IoT-based fluid monitoring systems
Usage Tips
Use only with non-corrosive liquids
Add filtering/averaging in code for stable readings
For ESP32 (3.3V ADC), use voltage divider
Ensure proper thread sealing (Teflon tape)
Avoid exceeding 2 MPa operating pressure
Advantages
High accuracy and reliability
Waterproof and rugged design
Easy integration for both indoor & outdoor use
Limitations
Requires calibration for precise readings
Analog output needs ADC processing
Not suitable for corrosive liquids
Needs proper mechanical installation
Summary
A high-precision analog water pressure sensor (01.6 MPa)
Outputs linear voltage (0.54.5V)
Ideal for IoT, automation, and water monitoring systems
Durable, waterproof