Product Usagenbsp nbsp Arduino robot kit raindrop rain plant leaf surface humidity sensor can be used for monitoring various weather conditions and comes with a relay for direct output controlling the start and stop of motors etc nbsp Product Introductionnbsp 1    The sensor is made of highquality FR04 doublesided material with a large area of 50  40CM and a nickel plated surface which has superior performance in terms of antioxidation conductivity and lifespan 2 The module is directly equipped with highpower relays to directly control the load 3 Adjust the sensitivity with a potentiometer and control the opening of the relay at different moisture levels nbsp Function introductionnbsp Connect the power supply the power indicator light will turn on and when there are no water droplets on the induction board the relay will close and start the relevant equipment The switch indicator light will turn on but when a water droplet drops the relay will disconnect and the switch indicator light will not turn on Performance parameters Module power supply 12V Static current 512mA Relay load capacity 250V 10A AC 30V 10A DC