
This switch senses a change in the (differential) pressure as the airflow changes. The (differential) pressure is applied to the two sides of a diaphragm in the control. The spring-loaded diaphragm moves and actuates the switch. The series P233A/F can also be used to detect small positive gauge pressure or to detect a vacuum.
Duct Pressure Switch, 50 to 400Pa, Diff: 30Pa, 1xNC/NO SPDT Open High/2A@250VAC, for 4/7 mm PVC tube

Detection ModeOver threshold
Mount TypeDuct
Switch TypeDifferential
MediumAir
Setpoint Range_Max0.4
Setpoint Range_Min0.05
Differential_Min0.03
Differential_Max0.03
Nbr. of Stages1
Pressure ConnectionFor 4/7 mm PVC tube
Reset TypeAutomatic Reset
Contact TypeSingle Pole Double Throw
Contact Rating2 A, 250 VAC
Contact Work ModeOpen Low - Close High
Contact Work ModeOpen Low - Close High
HousingIP54
Power Supply(None)
SeriesP233
Net Weight: 0.18kg
Product Dimension:Width 130 mmLength130 mmHeight70 mm