DFRobot Gravity Analog Water Pressure Sensor Module
π§ DFRobot Gravity Analog Water Pressure Sensor
π§© 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
βοΈ 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)
π Works like a pressure-to-voltage converter
π Key Specifications
πΉ Pressure Range: 0 β 1.6 MPa (β 0β16 bar)
πΉ Operating Voltage: 5V DC
πΉ Output Voltage: 0.5V β 4.5V (linear)
πΉ Accuracy: Β±0.5% β 1% FS
πΉ Response Time: < 2 ms
πΉ Current Consumption: ~2.8 mA
πΉ Thread Size: G1/4 (with G1/2 adapter)
πΉ Waterproof Rating: IP68
πΉ Operating Temp: -20Β°C to 85Β°C
πΉ Lifetime: β₯ 10 million cycles
π Pin Configuration (Gravity 3-Pin)
π‘ Signal β Analog output (0.5β4.5V)
π΄ VCC β 5V
β« GND β Ground
π Features
Linear analog output (easy calibration)
Plug-and-play Gravity interface
Fully waterproof (IP68)
High durability & long life
Fast and stable readings
π οΈ Applications
Smart water systems π§
Pipeline pressure monitoring
Water tank level estimation
Agriculture irrigation systems π±
IoT-based fluid monitoring systems
β οΈ 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
β Advantages
High accuracy and reliability
Waterproof and rugged design
Easy integration with microcontrollers
Suitable for both indoor & outdoor use
β οΈ Limitations
Requires calibration for precise readings
Analog output β needs ADC processing
Not suitable for corrosive liquids
Needs proper mechanical installation
π Summary
A high-precision analog water pressure sensor (0β1.6 MPa)
Outputs linear voltage (0.5β4.5V)
Ideal for IoT, automation, and water monitoring systems
Durable, waterproof, and easy to integrate
