The Honeywell DPSN Series Air Differential Pressure Switch can be used to monitor the status of filters, fans, and air flow in air ducts. A knob is included on the top of the pressure switch so the pressure value of the application under monitoring can be set within the range as such accuracy will be enhanced. 

Specifications Max. allowable working pressure (MAWP)  10000Pa 
Accuracy                          ≤15% 
Pressure medium            Air, non-flammable gases, non-corrosive gases
Pressure connections      2× plastic tubes, outside diameter: 6.0 mm
Switching capacity           1.5A, (0.4A)/250VAC 
Mechanical lifecycle         >1 million cycles 
Allowable working temp.  -20°C to +85°C  
Storage temp.                   -40°C to +85°C  
Electrical connections       AMP connectors or screw terminals 
Membrane material           Silicone 
Conduit entry                    CM-M20 x 1.5 
Protection class                IP54 
Certificates                        CE 
Included accessories         2× Plastic tube , 5× Screw ,  2m PVC pressure hose ,  L-shaped  mounting bracket