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For this purpose
The differential pressure switch LG50A4 is an adjustable differential pressure switch as per EN 1854 for automatic burner controls
Key features include: Extended capability
The relays (depending on the type of actuator)
with actuator control
Siemens QPD15.003 Differential Pressure Switch 1% increase applied For this purposeThe QPD differential pressure switches are used for monitoring air pressures and air flows. When the pressure falls below or exceeds the adjusted switching point, the respective electrical circuit will be opened or changes over. Specifiactions: For the supervision of air pressures or air flows of oil or gas fired equipment (burners, boilers, furnaces) QPD15 are suitable as absolute or differential pressure Adjustable working pressure ranges up to 5
