Series AT11910 ATEX/IECEx Approved 1910 Differential Pressure Switch

Series 1910 in Flame-Proof Enclosure

Series AT11910 ATEX/IECEx Approved 1910 Differential Pressure Switch is our most popular switch and is now available in a flame-proof package. This pressure switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. For air and non-combustible compatible gases, the AT11910 Series switches have set points from 0.07 to 20 in w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside the switch enclosure. Series AT11910 enclosures are available in aluminum enclosures and ideal for low pressure, hazardous area applications.

Important notes for installation:
• Cables must be fitted through 1/2" NPT cable gland or ATEX/IECEx conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve).
• Open cover only after de-energizing instrument.
• Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.

Please see Series 1900 for non-ATEX/IECEx approved.

California Residents:  Click Here for Proposition 65 WARNING.

Product Applications

  • Hazardous area low pressure applications
  • Air conditioning refrigeration coil icing detection; defrost cycle initiation
  • Clogged filter detection
  • Variable air volume controller

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

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Air and non-combustible, compatible gases.
Wetted Materials:
Consult factory.
Temperature Limits:
-30 to 180°F (-34 to 82.2°C); (Note: Product temperature limits differ from case).
Pressure Limits:
45 in w.c. (11.2 kPa) continuous, 10 psig (68.95 kPa) surge.
Switch Type:
±3% FS.
Electrical Rating:
15 A @ 120 to 480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. Derate to 10 A for operation at high cycle rates.
Mounting Orientation:
Diaphragm in vertical position.
Set Point Adjustment:
Screw type on pressure switch inside the Exd enclosure accessible by hole with plug on housing. Setpoint regulation must be done with instrument de-energized. Follow instructions and safety warning to open cover.
Enclosure Rating:
IP66. IP65 with option OPV, overpressure relief valve.
Housing Material:
Texture epoxy coat RAL7038.
Pressure Connections:
1/8" NPT female brass (SS optional). In presence of acetylene it is necessary to use SS.
Electrical Connections:
Two 1/2" FNPT. Cable gland not included.
7.49 lb (3.4 kg).
ATEX Certificate:
BVI 14ATEX0072.
Agency Approvals:
ATEX Compliant CE 1370 Ex II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C=Tamb=+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db


  • Flame-proof ATEX enclosure protects the device in hazardous areas
  • Compact size and repeatability, provides a high-value switch for many industrial and OEM applications
  • Wide range of models from 0.07 in w.c. to 20 in w.c. can meet exacting OEM specifications for a low pressure switch
  • Range screw protected inside switch enclosure prevents tampering

Model Chart

EXAMPLE AT11910 00 A B 1 X T2   Series AT11910-00-AB1XT2, Pressure Switch with Conduit ATEX/IECEx Enclosure, range 0.07-0.15" w.c., aluminum housing, blind top cover, 1/8" npt female brass pressure port, standard plug without overpressure relief valve, stainless steel tag
SERIES  AT11910               Pressure Switch with Conduit Atex Enclosure
RANGE   00
            0.07 - 0.15" w.c.
0.15 - 0.55" w.c.
0.4 - 1.6" w.c.
1.4 - 5.5" w.c.
3.0 - 11.0' w.c.
4.0 - 20.0" w.c.
HOUSING MATERIAL      A           Aluminum
COVER               Blind Top Cover
      1/8" npt female Brass Pressure Port
1/8" npt female Stainless Steel Port
    Standard without Overpressure Relief Valve
Overpressure Relief Valve material same as ports
TAG             T2   Stainless Steel Tag
OPTIONS               G Gold Contacts


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