SOR Inc.

The history of SOR Inc. is founded on simple ideas that work – and they work for a very long time. It all began in 1956 with the invention of the static o-ring (SOR) pressure switch. Since the ring is static, there is no friction, and no wear and tear.

Today’s SOR® products are descendents of that original static o-ring, with minimal moving parts for unmatched quality, reliability and durability. We now manufacture nearly one hundred process instruments that are used in a variety of applications such as power generation, oil and gas, cement and water treatment.

News & Events

1500 Series with CSA/US Explosion Proof Approval
SOR is pleased to announce the addition of CSA/US explosion proof certifications to the 1500 series electric level switch product line.  Read more...

Nuclear-Qualified Vendor Since 1982
SOR Vice President of Quality Colbert Turney has seen it all. When he first got involved in 1982, nuclear power was not a popular subject to discuss in public. Over the years he has seen many changes in the technology and public sentiment change from demonstrations to endorsements.  Read more...

SOR Shows and Events Calendar
Find out when we will be at a trade show near you.

Find your local Rep 102/103 Differential Pressure Switch
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T21 Thermal Differential Switch Flow Set-up Instructions