SOR Mini-Hermet Explosion Proof User Manual

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Form 169 (02.13) ©SOR Inc.

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Process Connection

The temperature sensing probe is 300 series stainless steel. If the process is
compatible, it may be directly inserted into the process without the use of a thermowell.
Best results are obtained when the probe is completely immersed in the process.
A thermowell increases response time (lag). A thermowell filled with thermal transfer
media reduces lag.

Safety Integrity Level (SIL) Installation Requirements

The SOR pressure switches have been evaluated as Type-A safety related hardware.
To meet the necessary installation requirements for the SIL system, the following
information must be utilized:

Proof Test Interval shall be one year.
Units may only be installed for use in Low Demand Mode.
Products have a HFT (Hardware Fault Tolerance) of 0, and were evaluated in a

1oo1 (one out of one) configuration.

This manual is related to the following products:

Dual Hi-Lo Weatherproof Dual Hi-Lo Explosion Proof Direct or Remote Mount Big Hermet