Water / Rain Drop Sensor Module Smart Home Weather Monitoring IOT For Arduino Raindrops Rainwater Detection TechMakers
Price RM3.50
Product SKU 40-000037
Size (L x W x H) 3.2 cm x 1.4 cm x 1 cm
Reward Points 8
Points Needed 312
Availability 78
  • Used for rain detection  and rainfall intensity
  • Adjustable sensitivity though a potentiometer
  • Lower the resistance (more water), the lower the voltage
  • Operating voltage: 5V
  • Output LED indicator
The raindrop sensor module is used for rain detection. It is also for measuring rainfall intensity. The module includes a rain board and a control board that are separate for more convenience. It has a power indicator LED and an adjustable sensitivity though a potentiometer. The module is based on the LM393 op amp. It includes a printed circuit board(control board) that collects the rain drops. As rain drops are collected on the circuit board, they create paths of parallel resistance that are measured via the op amp. The lower the resistance (or the more water), the lower the voltage output.Conversely, the less water, the greater the output voltage on the analog pin. A completely dry board for example will cause the module to output five volts.

Specifications of Raindrop sensor:

  • Operating voltage: 5V
  • Provide both digital and analog output
  • Adjustable sensitivity
  • Output LED indicator
  • Compatible with Arduino
  • TTL Compatible
  • Bolt holes for easy installation


PIN Description
GND Ground
DO Digital Output
AO Analog Output
Power LED Indicates that power is applied
Output LED Illuminates when moisture has exceeded threshold set by sensitivity adjustment
Senstivity Adjustment Clockwise is more sensitive. Counterclockwise is less sensitive
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What's in the box

1 x Water / Rain Drop Sensor Module