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TP33A pressure switch can be used to sense
(differential ) pressure and flow of air in ducts and
pipes .Typical applications include:-Filter obstructive
alarm .-Fan monitor-Air proving in ventilation ducts .
-Maximum air flow controller for variable air volume
systems .-Burner air control
Technical specifications: Measuring Range: TP33A-20: 20Pa-200Pa, TP33A-30: 30Pa-300Pa, TP33A-50: 50Pa-500Pa, TP33A-100: 100Pa-1000Pa . Max .medium Pressure: 5000Pa .Working Temperature:-15℃-+60℃(over-pressure 1000Pa) Protection levels:IP54. Output contact capacity:2A（0.5A） 250V. Weight:100g. Dimension:φ81×53mm .