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Water Detectors

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written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.

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Overview

WD – Water Detector and Sensor Tape

WD3 – Water Leak Detector

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WD - Introduction

Designed for dependable detection of low levels of conductive liquidsWater sensing tape attaches to module and if any liquid comes in contact with the tape the resistance is changed and the alarm will be triggeredTape is hydrophobic. Faster drying time since tape doesn’t absorb

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WD - Key Specifications

Switch Type: DPDTElectrical Rating: 1 A @ 24 VAC/VDCPower Requirements: 24 VAC, 24 to 30 VDCPower Consumption: 35 mA maximumEnclosure: Extruded aluminumSensor Tape: 1˝ (25.4 mm) wide and 5´ (1.5 meters), 10´, 15´ or 25´ (8 meters) long

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WD - FeaturesSensing tape is 1˝ wide and can be bought in lengths of 5´ (1.5meters), 10´, 15´ and 25´ (8meters)Multiple tapes can be connected together to extend the coverage area (120 meter max)Power and alarm LED’s,Other features include alarm test switch, continuous tape integrity self check and extendable tape sensor

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WD - Applications

Leak detection for large equipmentFurnaces, boilers, chillers,

Data Centers, etc

Tape can cover the whole floor under the equipment

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WD - Applications

Evaporator pans under refrigerators, freezers, and air handlersGeneral utility rooms in plants

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WD3 - Introduction

Detects the presence of water to prevent water damageAudible and visual alerts provide local indication of the alarm conditionInternal switch will give remote indication or control to prevent further build up of water

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WD3 -Key Specifications

Switch Type:Battery Powered Models: SPST NOExternal Powered Models: DPDT

Audible Alarm: At least 85 dB @ 1 foot distance (depends on model).Visual Alarm:

Red LED for water levelYellow LED for low battery (battery powered models only)Green LED for power condition (external powered models only)

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WD3 - Key Specifications

Enclosure Material: ABS and polycarbonate with flammability classification UL 94 V-0.Enclosure Rating:

Audible Alarm Models: Water-tight up to 3/4 of the body heightNon-Audible Alarm Models: NEMA 6P (IP 68) submersible

Agency Approvals: CE, RoHS

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WD3 - Technology

The sensor consists of two electrical contactsWhen the water level reaches a certain level, it bridges the contacts and allows current to flow

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WD3 - Features

Depending on the model orderedAudible and visual alerts provide local indication of the alarm conditionInternal switch will give remote indication or control to prevent further build up of water

Sensing height can be adjusted by using bracketMounting bracket can attach to any flat surface by either using the attached adhesive strips or mounting screwsCan be battery-powered or externally powered

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WD3 - Applications

Condensate leak detectionAir handlers, fan coil units, unit ventilators, data centers

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WD3 - Applications

Under-floor air systemsRaised floors serve as the air circulation space for heating and cooling