The Whitman Controls W117LG NEMA 4 Ultra Pure Stainless Steel Pres¬sure Switches have all welded stainless steel interiors which are Helium leak checked to pass 4 x 10-9 Std cc/sec. These are the NEMA 4 rated weather-proof, liquid-resistant version of the W117G, suitable for out¬side applications or in areas of condensing humidity. These switches are used in silicon wafer ovens, numerous medical devices, and other applications where even the slightest impurities are not tolerated.

Key Features:

• High Purity
• NEMA 4 Rated
• Welded stainless steel body and interiors, helium leak checked 
• Weather-proof and liquid resistant
• Set point options: Factory set, field adjustable, or a combination
• Extensive operating temperature range
• Wide range of electrical interfaces available
• SPDT or SPST availability

Specifications:

• Set point range: 0.80 to 500 PSIG
• Max System pressure: 150% of sensor capacity
• Temperature range: -65°F to +225°F (-54°C to +107°C)
• Amps: 5 Amps Max
• Sensor Element: Electric beam welded, helium leak tested
• Weight: 3.0 oz (varies slightly with electrical interface selection)
• Cycling: 3H/5H - Not to exceed 60 CPM, 10H/25H/50H - Not to exceed 20 CPM
• Wetted Parts:
  Capsule: 17-7 pH, electron beam welded
  Fitting: 303 Stainless steel 
  Standard Thread: ⅛-27 NPT male, Optional Threads: 1/4 VCR Male, 1/4-18 NPT Male