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Differential pressure switch LGW A1 Dungs for air, flue, exhaust gas - factory-adjusted

Pressure switch LGW A1 Dungs
  • These pressure switches LGW A1 are designed for monitoring in firing, ventilation and air-conditioning systems.
  • It is suitable for switching a circuit on, off or over on changes in actual pressure value relative to the set reference value. The reference value (switching point) is factory-adjusted as per EN 1854.
  • LGW A1 can be used as a differential pressure switch in pressure and vacuum ranges.
  • Maximum operating pressure: 100 mbar, setting ranges between 0.3÷50 mbar. Ambient and medium temperature -15÷85oC, storage temperature -30÷85oC.
  • Switching voltage: DC gold contacts 5÷24 V, silver contacts 24÷48 V; AC 24÷250 V. Nominal current: DC 20 mA - Au; AC 10 A - Ag (2.5 A for LGW 1,5 A1).
  • Electrical connection by means of a flat-type connector.
  • Compact size.
  • The installation position can change significantly the switching pressure.
  • Suitable for air, flue and non-aggressive gases but not for industrial combustion gases.


Functional description LGW A1:

The differential pressure acts via the diaphragm against the force of the setting spring on the microswitch. The pressure switch operates without any auxiliary power. The control unit responds to differential pressure. If the set reference value is exceeded or undershot, the circuit is switched on, off or over.


Technical specifications LGW A1 pressure switches

Pressure switch type Code Setting range (mbar) pmax (mbar) Degree of protection Δp (mbar) Medium p(+) Medium p(-)
Pressure switch LGW 1,5 A1 xxxxxx 0.3 ÷ 1.5 100 IP 00/20/42 ≤0.2 air air
Pressure switch LGW 3 A1 xxxxxx 0.4 ÷ 3 ≤0.35
Pressure switch LGW 10 A1 xxxxxx 1.0 ÷ 10 ≤0.5
Pressure switch LGW 50 A1 xxxxxx 2.5 ÷ 50 ≤1


Dimensions LGW A1 (mm)

Differential pressure switches LGW A1:
dimensions LGW A1-1 dimensions LGW A1-2 dimensions LGW A1-3
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1) Optional switching point lock cheese head screw ø 3x14
2) Optional sealing cap and connection p3, ø 4.6 mm
3) Sealing face for O-ring ø 4.87x1.8 to DIN 3371
4) Blind hole 8 x ø 3.8 deep
5) Optionally Mounting of contact protection for cheese head screw ø: 3x14


Type key LGW A1 pressure switch

Legend Pressure switch LGW A1


Prices LGW A1

Code Type Prices without VAT
xxxxxx Pressure switch LGW 1,5 A1 xxx st-se Ag-v-V9-IP00 0.00
xxxxxx Pressure switch LGW 3 A1 xxx st-se Ag-v-V9-IP00 0.00
xxxxxx Pressure switch LGW 10 A1 xxx st-se Ag-v-V9-IP00 0.00
xxxxxx Pressure switch LGW 50 A1 xxx st-se Ag-v-V9-IP00 0.00
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