QBM81-20

Differential pressure switch for air or non-combustible and non-aggressive gases, primarily used in air ducts, measuring range 200...2000 Pa, On / Off output, particularly suitable for air conditioning systems to provide indication of fan status or a clogged filter, intervention pressure value manually adjustable with a screwdriver by operating a potentiometer with a scale located under the cover, operating temperature from -30 °C...+85 °C, IP54 protection. Supplied complete with 2 plastic probes for insertion into the duct, 4 fixing screws, 2 m of flexible tubing 5/8 mm in diameter.