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 (≈ 0–16 bar)
🔹 Operating Voltage: 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: -20°C to 85°C
🔹 Lifetime: ≥ 10 million cycles
🔌 Pin Configuration (Gravity 3-Pin)
🟡 Signal → Analog output (0.5–4.5V)
🔴 VCC → 5V
⚫ GND → Ground
🔄 Features
Linear analog output (easy calibration)
Plug-and-play Gravity interface
Fully waterproof (IP68)
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 with microcontrollers
Suitable 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 (0–1.6 MPa)
Outputs linear voltage (0.5–4.5V)
Ideal for IoT, automation, and water monitoring systems
Durable, waterproof, and easy to integrate