Gravity: Analog Signal Isolator

The Gravity: Analog Signal Isolator is a plug-and-play module that provides electrical isolation between analog sensors and microcontrollers, ensuring accurate and interference-free measurements. It features an onboard 5V isolation power supply, so no external power is required—making your project setup simpler and safer.

Perfect for pH sensors, conductivity sensors, and any application where multiple analog sensors share a power source.

Key Features

• Built-in 5V isolated power supply

• Prevents interference between multiple analog sensors

• Designed for DFRobot 3-pin analog sensors, no soldering required

• 1:1 signal transmission ratio for minimal signal distortion

• Plug-and-play operation—no code changes needed

Applications

• Multi-parameter water quality monitoring systems

• Preventing signal overlap in sensor-heavy environments

• Ensuring stable output in environmental or industrial sensor networks

• Arduino-compatible sensor isolation

Technical Specifications

Non-Isolation Terminal (MCU Side)

• Supply Voltage: 5.0 ± 0.1V

• Analog Output: 0 ~ 5.0V

Isolation Terminal (Sensor Side)

• Output Voltage: 5.0 ± 0.2V

• Analog Input: 0 ~ 5.0V

Compatibility Notes

• Compatible with almost all DFRobot analog sensors

• Max output current from sensor side: 170mA

• Ensure no shared GND between sensor and MCU sides

• Module may warm up during extended operation—this is normal

Example Project

How to Use the Gravity Signal Isolator with Arduino
Learn how to integrate and protect sensors in projects using DFRobot’s isolator module.

What’s Included

• Gravity: Analog Signal Isolator ×1

• PH2.0–3P Cable ×2

Why Choose This Module?

• Eliminates cross-talk between analog sensors

• Increases sensor measurement accuracy

• Requires no additional power modules or coding

• Compact and easy to integrate into any Arduino-based system

Reference

Wiki

Schematic

Layout

Datasheet