Kemo-M152-12V-Rain-Detector-Sensor-Relay-Module-Pre-Assembled-Kemo-M152-P-Kemo-s-M152-rain-sensor-module-combines-a-liquid-sensing-plate-&-a-12V-normally-open-relay-contact-to-produce-a-switching-operation-controlled-by-the-detection-of-rain-or-snow-The-relay-is-activated-when-rain-is-detected-on-the-sensor-plate-&-de-activated-when-water-is-no-longer-present-Integrated-heating-avoids-water-staying-on-the-plate-once-it-has-stopped-raining-Potential-projects-include-motorised-windows-