A2G-40 Series

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A2G-40 Series

Differential Pressure Switch A2G-40 Series

Differential Pressure Switch


The Wika A2G-40 Series differential pressure switch is useful for DP and clogged filter monitor across filter banks; overpressure detection in rooms; and air flow proving for direct fire AHU's or duct heaters. The clearly visible adjustment knob makes it easy to set the switchpoint without tools. This SPDT switch can be set up as a N.O. or N.C. contact. It features a robust housing in a compact design.


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QtyModelDescriptionIn StockList PriceInternet Price
A2G40-S00-7C-EH DIFF PRESS SW, ADJUST, 0.08-0.80" WCINFO85.5347.90
A2G40-S00-7C-EI DIFF PRESS SW, ADJUST, 0.12-1.20" WCINFO85.5347.90
A2G40-S00-7C-EJ DIFF PRESS SW, ADJUST, 0.12-2.00" WCINFO85.5047.88
A2G40-S00-7C-EK DIFF PRESS SW, ADJUST, 0.16-2.40" WCINFO101.0056.56
A2G40-S00-7C-EL DIFF PRESS SW, ADJUST, 0.40-6.00" WCINFO85.5347.90
A2G40-S00-7C-EM DIFF PRESS SW, ADJUST, 2.00-18.00" WCINFO85.5347.90


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  • Adjustment knob enables easy switch point setting
  • Switch can be set up as N.O. or N.C.
  • Compact size

Supply Voltage:Not required

Contact Type SPDT: silver coated

 : (1=Com, 3=NC, 2=NO) 1Ω2 on DP increase

Contact Rating: 2A resistive, @270VAC

Setpoint (SP):Dial adjustment in 6 ranges (See ordering)

Differential :

Model:Progressive by SP from 0.02″ to 0.8″ WC

EH:0.02″ to 0.08″ WC (5 Pa to 20 Pa)

EI, EJ & EK:0.02″ to 0.12″WC (5 Pa to 30 Pa)

EL:0.04″ to 0.2″WC (10 Pa to 50 Pa)

EM:0.02″ to 0.8″WC (50 Pa to 200 Pa)

Reset Automatic: reset by differential

Visual Indication: External SP dial indication

Sensor Type: Silicon

Operating Pressure Range: Range dependant on unit ordered

Overpressure: (Burst) 200"WC (50 kPa)

Max Operating Pressure: (Proof) 18″WC (4.5 kPa)

Operating Temperature: -40° to 185℉ (-40° to 85℃)

Operating Humidity: 10 to 90% Non-condensing

Wetted Parts: Silicone

Media Compatibility: Inert dry air

Process Connection:3/16″ OD Plastic nipple for 1/4″ OD tubing

Wiring Terminations:3 Screw terminals w/PG gland (M16)

Mounting Vertical:w/ 2- hole tabs 0.15 (0.39 cm)

Enclosure Rating:ABS Plastic, NEMA 3 (IP54)

Dimensions:2.9″w x 4.2″ h x 2.5 d, (7.3 x 10.7 x 6.3 cm)

Weight: 0.3 lbs (0.15 kg)

Approvals: CE

Warranty: 2 year