HWB Water Leak Detector


The HWB Series is a small, lightweight device that activates and illuminates when water is sensed. Simply place on any flat surface under your equipment or attach using the included removable mounting brackets. The HWB relies on the electrical conductivity of water to change the resistance across two contacts at the base of the enclosure. When the contacts are bridged by water, the resistance changes and triggers an alarm.

Choose the WB for applications that require visual alert and/or relay contacts. The WBWO-1 provides a visual alarm and the WBWA-1 unit will trigger both visual and audible alarms when water is sensed. Both units require an external 24VAC/VDC power supply.

Typical Uses: Dishwashers, Sinks, Toilets, Washing machines, Water heaters, Air conditioner.

  • WBWA-1 Visual and audible alarm) - Sensor with Relay, 24 VAC/DC power with audible alarm.
  • WBWO-1 (Visual alarm) - Sensor with Relay, 24 VAC/DC power.
  • DAS-BKT - Mounting Bracket for WBWA & WBWO.


  • Small, compact design
  • Removable mounting bracket
  • Switch Type: DPDT relay.
  • Electrical Rating: DPDT 1 A @ 24 VAC/DC, 1 A @ 120 VAC.
  • Power Requirements: 11-27 VAC/DC.
  • Power Consumption: DC 25 mA typical and 75 mA max, AC 30 mA typical and 85 mA max.
  • Electrical Connections: attached 22 AWG, PVC insulated cable (4.8 ft long).
  • Enclosure: acrylic, ABS plastic.
  • Temperature Limits: 32 to 122°F (0 to 50°C).
  • Weight: 4.3 oz.
  • Dimensions: 3" L x 2" W x 1-1/4" H.


Extra Information

Meter Approvals
Digital Meter Type