Pressure Switches
Baratron Gauge Pressure Switch

The MKS Types 41, 42, 51 and 52 Vacuum, Atmospheric and Pressure Switches offer accurate and reliable protection for vacuum equipment, atmospheric switching, and vacuum/pressure processes. Designed for applications where a DC signal output is not required, these switches provide relay outputs that are readily interfaced with alarms, valve actuators, computers, process controllers, load locks and other protection devices.

The Type 41/42 switches reference atmosphere while the Type 51/52 switches reference vacuum. The Type 41/42 switches are often used to ensure a loadlock pressure has equilibrated to local atmospheric pressure before opening the door. The trip point on MKS' atmospheric switches can be set to trip above, below (reverse calibration), or exactly at current atmospheric pressure. Applications for the 51/52 switches include soft pumping, gas box switching, and safety interlocks.