The ADC-S40-W-P is an optional probe accessory designed for use with the Alarm.com ADC-S40-W Water Sensor. The probe extends the sensor’s water detection capabilities, allowing it to monitor hard-to-reach areas where moisture or leaks may occur. Ideal for placement under appliances, behind water heaters, near sump pumps, or in other confined spaces, the probe helps provide early detection of water leaks before they cause costly property damage.