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
 

 
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