ALTA 900 MHz AA - Voltage Detection, 500 VAC

The ALTA AC Voltage Detection Sensor notifies of the presence or absence of electricity. Intended for use on devices with supply power from 24-500 VAC (not for DC sources or voltages higher than 500 VAC). Perfect for HVAC systems, sprinkler systems, sump pumps and other electrical appliance monitoring. Triggers on the state change from presence to absence of voltage and vice versa, displaying "No Voltage" or "Voltage Detected".