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Differential Pressure ATEX Enclosures

The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific,

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

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Overview

Magnehelic®AT22000

Photohelic® AT3A3000 AT23000MR

Digihelic®AT2DH3

SwitchesAT21823 AT11910 AT1ADPS

TransmittersAT2MSAT2605

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ATEX Housing Rating

II 2 GD Ex d IIC Gb T6, -50°C≤Ta≤+60°C Ex tb IIIC Db T85°C

ATEX flame proof against:Gas, Vapors, Mist, Dust

Alcohol, Aromatics, Propane, Methane, Ketones, Wood Dust, Coal Dust, etc

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ATEX Housing Rating

Limits damage and propagation of fire in the event of failure or combustion

Contains and quenches any flame

Gases/dust may be present but not all the timeTemperature ratings

Gases: ambient temperatures up to 60 °CDust: ambient temperatures up to 85 °C

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ATEX Housing Options

Enclosure options:Blind or glass topSS or brass pressure connectionsOverpressure relief valve

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Magnehelic®

Series AT22000Gage differential pressure indication with scale ranges from 60 Pa (0.25 INWC) to 30 kPa (120 INWC)

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Photohelic®

Series AT3A3000Offers gage differential pressure indication with 2 DPDT latching relays in scale ranges from 60 Pa (0.25 INWC) to 30 kPa (120 INWC)

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Photohelic®

Series AT23000MRGage differential pressure indication with 2 SPDT relays in scale ranges from 60 Pa (0.25 INWC) to 30 kPa (120 INWC)Low Voltage Power

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Digihelic®

Series AT2DH3Digital differential pressure indication with 2 SPDT relays and an adjustable 4 to 20 mA output, in scale ranges from 60 Pa (0.25 INWC) to 35 kPa (100 INWC)Display measurement modes for pressure, air velocity, and volumetric flow

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Switches

Series AT21823Differential pressure switch with set point ranges from 17 Pa (0.07 INWC) to 21 kPa (85 INWC)SPDT rated 15 A @ 120-480 VAC±2% FS repeatability

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Switches

Series AT21900Differential pressure switch with set point ranges from 17 Pa (0.07 INWC) to 4.9 kPa (20 INWC)SPDT rated 15 A @ 120-480 VAC±3% FS repeatability

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Switches

Series AT2ADPSDifferential pressure switch with set point ranges from 20 Pa (0.08 INWC) to 5 kPa (20 INWC)SPDT rated 1.5 A @ 240 VACIndicating set point adjustment knob

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Transmitters

Series AT2MSDigital differential pressure indication with analog output, in scale ranges from 25 Pa (0.1 INWC) to 5 kPa (25 INWC)Display measurement modes for pressure or air velocity Analog outputs

4 to 20 mA, 0 to 5 V, or 0 to 10 V

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Transmitters

Series AT2605Gage differential pressure indication with 4 to 20 mA output, in scale ranges from 60 Pa (0.25 INWC) to 500 Pa (2 INWC)

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Applications

Hazardous Area Air Flow Measurement:

Coal Mine Ventilation Air FlowWastewater Treatment VentilationOil Refinery Ventilation

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Applications

Air Scrubber MonitoringMaintain DP across scrubber for efficiency

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Applications

Coal Power Plant Dust Collection

Log DP for environmental agencies and control filter cleaning

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Applications

Hazardous area HVAC systems:Filter monitoring Blower vacuum monitoringFan pressure indicationDuct static, room, or building pressures