Mks turbo pump high vacuum chamber transducer switch

Mks turbo pump high vacuum chamber transducer switch

MKS Turbo Pump High Vacuum Chamber Transducer Switch
NOTE #2: Below is information I found on the 241A, which is different (by the "A"), than this model. I believe that the likelihood is that these are basically the same units. I do not know that for sure, however. For your reference, I have included the information on the model# 241A below.
The MKS Type 241A Vacuum Pressure Switches are based on the well-known MKS Baratron capacitance manometer and are dedicated to operating an internal relay, which provides two contact closures or openings as outputs (DPDT). The 241 units offer fast, accurate, and reliable protection for vacuum equipment and processes.
Designed for applications where a DC signal output is not required, the relay outputs are readily interfaced with alarms, valve actuators, computers, process controllers, or other protection devices. The 241switches combine the proven MKS Type 127 high accuracy sensor with full scale ranges from 1 Torr to 25000 Torr and resolution of 0.01 % of full scale, together with signal conditioning and relay output circuitry within a single enclosure. The vacuum pressure switch senses the deflection of a diaphragm due to applied pressure, providing a switched output when pressure exceeds the chosen trip point. An LED provides visual "Above Set Point" indication, and facilitates adjustment of the trip point. The dual electrode design is an all metal, all welded design, thus exposing only corrosion resistant Inconel to the process gases.
This design ensures fast response to pressure transients independent of gas composition. The vacuum pressure switches may be wired internally for Fail-Safe operation. In this mode, the output relay will be energized when the pressure is below the trip point instead of above. Failure of key components such as the relay (open coil) or loss of power supply voltage will then cause a high pressure (alarm) condition, in addition to any over-pressure faults
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