Add Reliable Rain Steam Water Sensor Gravity Sensing to Your Next Build

This is a steam(water)sensor from DFRobot. This steam sensor can be connected to the Arduino IO Expansion shield directly. The output voltage will increase when the humidity of the sensor surface goes up.

Notice:The new version of analog sensor port pin mapping has been changed as the following two features.Please check the tips for changing sensor cable pin mapping while using the I/O Expansion shield. We will continue to update. For the inconvenience caused, please understand.

Why you'll love it

• Simple rain detector
• Cheap steam level switch
• Touch sensor based on humidity
• Power supply: 3.3v or 5v
• Output voltage signal: 0~4.5v(@5v) or 0~3.0v(@3.3v)
• Pin definition:

What you can build

This part fits monitoring, measurement, logging, alarms, and automation builds. It works well in Arduino, ESP32, and Raspberry Pi style projects where you need reliable real-world data from the rain steam water sensor gravity.

Starter bundles

Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus sensor cables, headers, or a matching expansion shield for faster setup.

Recommended add-ons

Useful add-ons include displays, data logging modules, waterproof enclosures, and matching Gravity cables or sensor shields.

Technical specifications

Pinout & usage notes

Check the supported input voltage before wiring so the module matches your controller and power source. For analog readings, use a stable reference and keep wiring short when possible for cleaner signals. If you are using Gravity connectors, align the plug correctly and avoid forcing the cable into the wrong header.

DFRobot resources

Official product page: View on DFRobot
Wiki / documentation: Open DFRobot wiki

What’s in the box

1 × Rain Steam Water Sensor Gravity

Frequently Asked Questions