SA104 series 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: SA104-20: 20PA~200PA SA104-30: 30PA~300PA SA104-50: 50PA~500PA SA104-100: 100PA~1000PA SA104-500: 500PA~2000PA Max. Differential pressure: 5000PA Degree of protection: IP54 Electrical rating value: < 2A / 250VAC Working temperature: -15~+60 Storage temperature: -40~85 Min. Actuating pressure: Standard: 20PA; Min. Starting interval: 10PA(range: 20~30PA) Linearity: Range 30~300PA < ± 3PA Installation direction: Vertical(standard installation style) Hose connection: PipeΦ 6.2mm Weight: 100 grams without bracket Repeatability: < ± 0.025mbarIn the ranges 0.2 to 3mbar.