Adjustable differential pressure switch / air pressure switch/gas flow switch

differential pressure switches can sense the pressure difference , vacuum, over pressure, poor flow of the incorrosive gas.
Conventional applications include :
+ Monitoring Filters blocked Alarm Device
+ Monitoring air blower running status.
+ Monitoring air of ventilative pipelines 
+ Controlling the largest gas flow of variable gas volume 
+ Monitoring the gas of combustion furnace.

Product parameters:
Measuring range: 50Pa~500Pa
Max.differential pressure: 12000Pa
Degree of protection: IP54
Electrical rating value: <2A / 250VAC
Working temperature:-15~+60°c
Storage temperature: -40~85°c
Min. actuating pressure: standard: 20Pa;min.starting
----------------------------------- interval:10Pa(range: 20~30Pa)
Linearity: range 50~500Pa <±3Pa
Installation direction: vertical(standard installation style)
Weight: 110 grams without bracket
Repeatability: <±0.025mbarIn the ranges 0.5 to 5mbar