Best For
- Drip pans under HVAC equipment and chillers
- Computer rooms, data centers, and raised floors
- Telecommunication facilities and equipment shelters
- Leak monitoring around pumps and mechanical systems
Key Features
Conductive Liquid Detection
Senses low levels of conductive liquid the instant it contacts the hydrophobic sensor tape; the tape does not absorb liquid, so it dries fast for quick return to service.
DPDT Alarm Relay
Two identical relay outputs rated 1 A @ 24 VAC/VDC. Wire outputs in parallel for loads heavier than 1 A. Do not apply more than 30 V to the alarm outputs.
Fail-Safe Operation
The detector goes to the alarm contact state on loss of power or if the sensor tape is removed, open, or shorted, so faults are never silent.
Clear Local Indication
Green LED confirms power, amber LED indicates alarm, and a Test pushbutton simulates water detection to verify module operation.
Rugged, Easy to Wire
Sturdy extruded aluminum enclosure with screw terminals and a 1/2 in. conduit or flex connector opening for clean field terminations.
Scalable Coverage
Compatible with 5, 10, 15, and 25 ft sensor tape; multiple tapes connect together to extend the monitored area across large rooms.
Technical Specifications
| Specification | Value |
|---|---|
| Service | Conductive liquid |
| Switch Type | DPDT |
| Electrical Rating | 1 A @ 24 VAC/VDC |
| Power Requirements | 24 VAC, 24 to 30 VDC |
| Power Consumption | 35 mA maximum |
| Electrical Connections | Screw terminals |
| Conduit Connections | Hole for 1/2 in. conduit |
| Enclosure | Extruded aluminum |
| Compatible Sensor Tape | 1 in. (25.4 mm) wide; 5, 10, 15, or 25 ft (sold separately) |
| Indication | Green power LED, amber alarm LED, Test pushbutton |
| Fail-Safe | Alarm on power loss, tape removal, open, or short |
| Weight | 8 oz (0.23 kg) |
Documentation
Datasheet – Bulletin L-WDRelated Products
Frequently Asked Questions
What does the Dwyer WD water detector detect?
It detects low levels of conductive liquid, such as water, when liquid contacts the attached sensor tape and changes its resistance.
What power does the WD require?
24 VAC or 24 to 30 VDC, with a power consumption of 35 mA maximum.
What is the switch type and rating of the WD?
The WD uses a DPDT relay rated 1 A @ 24 VAC/VDC, with two identical outputs that can be wired in parallel for heavier loads.
Does the Dwyer WD include sensor tape?
No. Sensor tape is sold separately in 5, 10, 15, and 25 ft lengths (models TP05, TP10, TP15, and TP25).
What happens if power is lost or the tape is removed?
The detector goes to the alarm contact state, so loss of power, a removed tape, or an open or shorted tape is reported as an alarm.
Can the monitored area be extended?
Yes. Multiple sensor tapes can be connected together to extend the coverage area for large rooms.
5-Year Limited Warranty. Dwyer Instruments warrants the Series WD water detector against defects in materials and workmanship under normal use. The Model WD is not field serviceable and should be returned for repair if needed; field repair may void the warranty. Contact customer service for a return goods authorization number before shipping.
- Tape-Length:
- 0 ft
- Media Compatibility:
- Conductive liquids
- Applications:
- Commercial and Industrial
- Switch Rating:
- 1 A @ 24 Vac/Vdc
