SOR is proud of their range of product based on simple ideas that work and 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 descendants of that original static o-ring, with minimal moving parts for unmatched quality, reliability and durability. They 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.

SOR pressure switches are rugged field-mounted instruments. The pressure sensing element of the SOR pressure switch is a force-balance, piston-actuated assembly. The sensing element is sealed by a flexible diaphragm and a static o-ring. A wide selection of wetted parts materials for media compatibility and containment are available. A metal diaphragm may be welded to the pressure port for certain applications, thereby eliminating the o-ring.

SOR manufactures a wide range of compact, loop powered pressure transmitters to accurately and reliably measure system pressure at an economical price. The stainless steel pressure port, Viton o-ring seal and ceramic sensor make the wetted parts chemically compatible with most gases and liquids.

SOR also manufactures a range of differential pressure switches featuring a two-piece piston design which allows for complete differential pressure reversal without damage.

SOR level switches are rugged, industrial products specifically designed for versatility of application.

Float and displacer operated mechanical level switches are available with flanged or sealed chambers or as insertion models. Options available for each type of switch include: switch type and number, housing type, chamber material, process connections, accessories, and more. Units may be customized to suit your specific needs.

SOR mechanical level switches are available in many configurations. If you don't see what you need, contact us and we will engineer a solution for your application. The SOR 1500 series mechanical level switches answer the industry's call for a less expensive alternative to the traditional chambered switch. The 1500 series is suitable for most any point level application and the all-stainless steel construction delivers dependability under the most demanding conditions.

SOR Temperature Switches utilize a vapor-pressure thermal system. Fluid vapor pressure changes predictably according to the influence of temperature on the sensing bulb. Process temperature changes cause proportional vapor pressure changes in the temperature sensing bulb that act on the diaphragm/ piston assembly to actuate and de-actuate a snap-action electrical switching element at discrete process temperatures. More specific application requirements can be met by selecting optional components, such as housings and electrical switching elements.

Vane-actuated flow switches are designed for direct sensing of liquid flow in pipelines. These switches are magnetically actuated and feature rugged internal construction and all stainless trim. Minimum line pressure loss is achieved by carefully selecting the vane position in the pipeline.

The Model T21Point Level Switch uses a thermal differential technique to measure liquid flow, level or interface by sensing changes in the thermal heat transfer characteristics of the media where it is located.

Type 1520 is a vertically mounted, vane-operated flow switch suitable for plant and OEM applications where open or closed contacts are required to signal flow or no flow conditions. The vane extension arm moves a magnet which actuates (de-actuates) a hermetically sealed reed switch.

SOR ultrasonic level transmitters are a proven solution offering more flexibility and reliability than similar products. With unique features such as state-of-the-art programming, adaptive gain and a very powerful transmit pulse, they provide consistent operation in conditions where other ultrasonics fail.

The SOR 670 RL level transmitter provides continuous level measurement and a 4-20 mA linear output. It is a high-performance, general-purpose level transmitter that is well suited for many demanding applications that other technologies cannot handle. Features include: continuous level measurement, range to 150 feet, loop-powered, and an intrinsically-safe 4-20mA output. A variety of probe configurations are available to meet most application conditions.

Many nuclear power generation plants were built decades ago, often resulting in obsolete parts as well as obsolete suppliers. SOR's engineering expertise is specifically targeted to meet the unique demands of the nuclear power generation industry and provide solutions. SOR calls it custom engineering, and they build a variety of 1E-qualified mechanical pressure, vacuum, and temperature switches to meet your specifications. SOR instruments are among the most reliable devices for redundant safeties, alarms and other applications.

We created this page to give you a quick overview of the wide range of products from SOR Process Instrumentation. Contact us HERE to discuss your application, or visit the SOR Web Site for more information.