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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.
Important: Use the official DFRobot links below for wiring, sample code, downloads, and the latest setup notes for this SKU.
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
| Product | Rain Steam Water Sensor Gravity |
|---|---|
| SKU | SEN0121 |
| Brand | DFRobot |
| Interface | Analog |
| Power supply | 3.3v or 5v |
| Output voltage signal | 0~4.5v(@5v) or 0~3.0v(@3.3v) |
| Dimensions | 30x20x6mm (0.18x0.79x0.24") |
| Warning | The connector is not waterproof, please be careful not to put the connector directly in water. |
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
Can I use this for logging or monitoring projects? Yes. It is a good fit for data collection, automation, and alert-based builds when paired with a supported controller.
Does it work with other boards too? Often yes, as long as voltage, interface, and pin mapping match. ESP32 and Raspberry Pi users should still check the official docs first.
Where can I find wiring and examples? Use the official DFRobot product page and wiki links below for guides, downloads, and code examples.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Compatibility & downloads
// downloads
- Dimension zip
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