SOR 141 Differential Pressure Switch - Manual (Page 2)

2/4 Form 1307 (04.13) ©SOR Inc.
Site Storage
Store switch in a dry area in the original shipping package. Shelf life is 10 years for a
maximum ambient temperature of 80°F, based on aging data in SOR Test Report 9058-102.
Electrical connections are
marked on the insulation
of the wire leads. Conduit
should be installed without
applying strain to the
housing.
Differential
Pressure
Differential
Pressure
Be certain the process connection is tightened and positioned so bending and torsional
forces imposed on pressure switch are minimal. Use care not to loosen sensor assembly
from housing.
131 - One process connection is provided for the high-pressure side of the device and one
for the low-pressure side.
141 - Two process connections are provided for the high-pressure side of the device and
two for the low-pressure side. On liquid service, the extra process connections should be
used to assist in bleeding the air out of the sensor. On gas service, they may be used to
drain condensate or accumulated liquid.
Process Connection
Electrical Connection
Minimum Bend Radius for Wire
Permanent Training 1/2”R
Pulling Tension 1”R
Terminating Junction 1/4”R
When the process could be considered dirty in terms of suspended particles,
it is recommended that 20-micron in-line fi lters be installed on the Hi and Lo
pressure ports.