General Purpose and Hazardous area switches are categorized by NEMA standards.

Vacuum Switches - Hazardous Area

Products
ITT Neo-Dyn
142P6 (Encl.6) Series- Internal Adjustment
NEMA 4X, 7, 9 & 13
Ultra Low Vacuum/Pressure crossover switch. Internal wetted material options replacing the diaphragm seals. Enclosure 6.
ITT Neo-Dyn
181P6 (Encl.6) Series-Internal Adjustment
NEMA 4X, 7, 9 & 13
Pneumatic/ low impulse hydraulic applications. Set point stability and vibration resistance. Deadband can be preset. Enclosure 6.
ITT Neo-Dyn
182P6 (Encl.6) Series-Tamper Resistant
NEMA 4X, 7, 9 & 13
Serving low to mid-range vacuum applications. After adjustment and installation the units become tamper proof. Enclosure 6.
ITT Neo-Dyn
Conventional Switches vs ITT Neo-Dyn Switches
ITT Neo-Dyn
Definitions & Terminology
ITT Neo-Dyn
Media Compatibility Guide
ITT Neo-Dyn
Quick Refrence Chart