SOR Bourdon Tube Weatherproof Pressure Switch - Manual

Form 1214 (03.13) ©SOR Inc. 1/4
This instruction provides information for mounting, electrical connections and calibration
of SOR
® 401 High-Range Bourdon Tube Pressure Switch.
401 Bourdon Tube
Pressure Switch
General Instructions
Registered Quality System to ISO 9001
NOTE: If you suspect that a product is defective, contact the factory or the SOR Representative
in your area for a return authorization number (RMA). This product should only be installed by
trained and competent personnel.
Mounting
Attach the switch to a suitable surface with two 1/4” diameter bolts. Line mounting by
either piping or electrical connections is not recommended.
Process Connection

Use two wrenches when connecting process piping to the process connection.

Use one 1-1/8” open end wrench to hold the hex while connecting the process piping.

Use the other wrench to tighten the process pipe or fitting.
Design and specifications are subject to change without notice.
For latest revision, go to www.sorinc.com
401LC
The process pressure is sensed by a limited
travel bourdon tube which is counter
balanced by a range spring (adjustable by
an adjustment screw). This acutates the
electrical snap-action switching element.