Waveshare Moisture Sensor


Out of stock

Approx Restocking Date: 25 to 30 Days
SKU: 1219075


  1. Detection depth: 38mm
  2. Power: 2.0V ~ 5.0V
  3. Dimension: 20.0mm * 51.0mm
  4. Mounting holes size: 2.0mm


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Category: Temperature & Humidity Sensor

This is Waveshare Moisture Sensor.

The sensor to determine the moisture level of the soil. It is powered with the voltage from 3.1 V to 5 V. The output is the analog voltage which increases its value along with the increasing moisture content which makes it compatible with most commissioning modules, for example, Arduino. The device can be used, for example, for measuring the moisture content of the soil in the pot.

The sensor has an analog output that should be connected to the pin of the A/D converter (analog input in Arduino). This will allow you to measure the proportional voltage signal and at the same time to determine the level of soil moisture.

Operating principle:
This module is an application of the current amplification by a transistor. When the water in the soil is sufficient enough to conduct the current between the base and the positive power supply, a certain amount of current is generated between the base and the emitter. And in a mean while, an electric current is produced in a certain amplification factor between the collector and the emitter, and applied to the resistant in the emitter to produce a voltage. Then, this voltage will be collected by an AD converter.


  1. Auto watering system
  2. Flowerpot soil moisture detection
  3. Auto pouring system


  1. Auto watering system
  2. Flowerpot soil moisture detection
  3. Auto pouring system
  4. VCC ↔ 2.0V ~ 5.0V
  5. GND ↔ power supply ground
  6. AOUT ↔ MCU.IO (analog output)

Package Includes:

1 x Moisture Sensor
1 x 3-pin custom connector jumper wire

SKU: 1219075 Category:
Input Voltage (V)

2.0V ~ 5.0V

Dimensional Accuracy (mm):

20.0mm x 51.0mm

Output Type

Analog output

Mounting Holes Diameter (mm)


Shipping Weight 0.007 kg
Shipping Dimensions 7 × 5 × 1 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Reimbursement or replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China

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