Series
 Std. Ranges
 No. of Contacts
 Housing Material
 Diaphragm Material
 
2WPS General Purpose Pressure Switches2WPS General Purpose Pressure Switch

 

 Vac to 500 psi
 One, SPDT
 Anodized aluminum
 Aluminum and Buna-N (Teflon® O-ring or Viton® diaphragm optional)
 

 
3WPS Industrial Pressure Switches

3WPS Industrial Pressure Switch

 30 psi to 1,600 psi
 One, SPDT Anodized aluminum Aluminum and Buna-N (Teflon® O-ring or Viton® diaphragm optional) 

 
4WPS Low Pressure Diaphragm Pressure Switches

4WPS Low Pressure Diaphragm Pressure Switch

 "H2O to 150 psi
 SPDT or DPDT Anodized aluminum
 304 SS with Viton® seals and 17-7 PH SS diaphragm
 

 
5WPS Differential Pressure Switches
5WPS Differential Pressure Switch
 15 to 5,000 psi
 One or two SPDT
 Cast aluminum
 SS
 

 
9WPS Explosion Proof Compact Pressure Switches

9WPS Explosion Proof Compact Pressure Switch

 Vac to 10,000 psi  SPDT or DPDT  316 SS
 

Vacuum and low pressure -seals: Viton® diaphragm
High pressure - piston: SS with Teflon® backup ring and Viton® o-ring