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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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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.
Overview
Magnehelic®AT22000
Photohelic® AT3A3000 AT23000MR
Digihelic®AT2DH3
SwitchesAT21823 AT11910 AT1ADPS
TransmittersAT2MSAT2605
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
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
ATEX Housing Options
Enclosure options:Blind or glass topSS or brass pressure connectionsOverpressure relief valve
Magnehelic®
Series AT22000Gage differential pressure indication with scale ranges from 60 Pa (0.25 INWC) to 30 kPa (120 INWC)
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)
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
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
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
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
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
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
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)
Applications
Hazardous Area Air Flow Measurement:
Coal Mine Ventilation Air FlowWastewater Treatment VentilationOil Refinery Ventilation
Applications
Air Scrubber MonitoringMaintain DP across scrubber for efficiency
Applications
Coal Power Plant Dust Collection
Log DP for environmental agencies and control filter cleaning
Applications
Hazardous area HVAC systems:Filter monitoring Blower vacuum monitoringFan pressure indicationDuct static, room, or building pressures