Johnson Controls WD-2 Detector

The Johnson Controls WD-2 Detector is an industrial-grade, 24V conductive liquid sensing solution specifically engineered for HVAC condensate monitoring and Building Automation Systems (BAS). This line-powered unit functions as a high-reliability drain pan level switch and leak detection interface, utilizing the electrical conductivity of water to bridge its base contacts. Designed for versatile field application, it features a weather-resistant NEMA 4 enclosure and is capable of both floor and under-pipe mounting. The WD-2 water detector provides actionable feedback through SPDT alarm and trouble relay contacts, allowing for seamless integration into supervisory controllers or local alarm circuits. Integrated LED indicators provide immediate visual status for power and alarm conditions, while the jumper selectable relay action allows technicians to configure the output for normally energized or de-energized operation. This model is supplied without sensor tape, making it the ideal replacement part for existing probe-style installations or for use with separate sensing electrodes where custom lead lengths are required.

• Engineered for BAS Integration: Features SPDT relay contacts rated for up to 1 A @ 24 VAC/DC, ensuring compatibility with standard 24V control circuits.
• Industrial-Grade Durability: Housed in a weather-resistant enclosure to withstand the harsh environments of mechanical rooms and rooftop units.
• Configurable Logic: Includes jumper selectable relay action, giving technicians the flexibility to set alarm logic based on specific job site requirements.
• Visual Status Monitoring: Equipped with dual LED indicators (green for power, red for alarm) for rapid diagnostic checks during routine maintenance.
• Mounting Versatility: Designed for flexible 11 to 27 VAC/DC power requirements with support for both floor and leak pan mounting.

Does this unit include the adhesive sensing tape?
No, this specific model is the WD-2 detector only, provided without tape. It is designed to be used as a standalone probe detector or paired with a separate sensor tape as required by the application.

What is the power requirement for the WD-2?
This is a line-powered model requiring 11 to 27 VAC/DC, making it a standard fit for most 24V HVAC control transformers.

Can the alarm relay be used to shut down equipment?
Yes, the SPDT alarm relay can be wired into the break-on-rise circuit of a contactor or the digital input of a controller to facilitate automatic system shutdown upon moisture detection.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.