Description

Specification Details
Operating voltage 3.3–5 V DC
Sensing principle Water creates conductive paths between exposed tracks
Comparator LM393-type
Analog output — AO Voltage varies with surface wetness; typically decreases as more water covers the plate
Digital output — DO Typically LOW when the wetness threshold is exceeded; HIGH when dry
Threshold adjustment Onboard potentiometer
Interface connections VCC, GND, AO and DO
Sensor connection Two-wire connection between sensing plate and controller
Indicators Power and detection-status LEDs
Mounting Mounting holes on sensing plate and controller
Kit contents shown Sensing plate, comparator board and two connecting wires
Applications Rain alerts, automatic window-cover projects, weather stations and irrigation control