# Simple Water Detection Sensor with Digital Output

**Type:** Product page · **SKU:** ADA4965 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/simple-water-detection-sensor-with-digital-output.html ([markdown](https://core-electronics.com.au/simple-water-detection-sensor-with-digital-output.html.md))

Keep wet things wet and dry things dry by detecting when the dry things get wet by accident! This palm-sized cherry-red water sensor is simple and easy to implement in your wet-dry-sensing project.

## Pricing

- **Price:** $4.10 (inc GST) — $3.73 AUD, exc GST
- **Quantity discounts:** 10+ $3.62 (exc GST) · 50+ $3.55 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 75 more in 8–12 days.

## Description

Keep wet things wet and dry things dry by detecting when the dry things get wet by accident! This palm-sized cherry-red water sensor is simple and easy to implement in your wet-dry-sensing project.

Usage is very simple: connect the minus (-) pin to ground, connect the plus (+) pin to 3 to 5V DC and then the output signal pin (S) goes to your microcontroller.

The sensor has a very lightly biased transistor that is connected to two long sets of interlocking traces. When a lil bit of water/condensation lands on the PCB and touches two of the traces, the transistor will turn on, setting the output pin high. The output voltage does vary a bit with how much water is detected, but honestly we recommend just using it as an "on or off" type sensor.

Avatar water-bending skills not included!

**Technical Details**

- Technical dimensions (including header): 64.7mm x 20mm x 7.7mm
- Product Weight: 3.7g / 0.1oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/4/9/4965-06.jpg)