IMG_1317Instrumentation is defined as the art and science of measurement and control of process variables within a production or manufacturing area.  These instrumentation devices measure and/or regulate various physical quantity or process variables such as flow, temperature, level or pressure.  The instruments can be as simple as valves or transmitters or as complex as analyzers. They are integral parts of most process controllers. Output instrumentation includes devices such as solenoids, regulators, circuit breakers or relays which control a desired output variable and provide either remote or automated control capabilities.  Transmitters produce output signals that can be used for informational purposes or sent to a PLC, DCS or SCADA system where it can be interpreted and used to control other devices and/or processes in the system.  Control instrumentation is a key part of control loops by not only measuring the field parameters but by providing the ability to modify the parameters as needed.

The instrumentation devices integrity is not complete without considering the critical link, tubing!  Proper instrument tubing must be selected to ensure a secure, efficient and flawless process flow.  Important considerations in the selection of suitable tubing include such factors as the compatibility of the tubing material with the media to be contained, the systems operating pressure, and the operating temperature.  In general, high pressure and high temperature installations require strong tubing materials such as steel or stainless steel be used.

The instrument fittings are designed to work on like materials, i.e. stainless steel fittings should be used only with stainless steel tubing.  Mixing materials is not recommended.  The only exception is brass fittings with copper tubing.  Dissimilar materials may be susceptible to galvanic corrosion and also may have different levels of hardness which can adversely affect the fittings ability to seal on the tubing.  Extra special care must be taken on tubing to be used for gas services in order to achieve a gas-tight seal.IMG_1312

Precision Electric has completed several projects involving instrumentation and tubing.  All of our technicians are specially trained by Swagelok (one of the leading suppliers in the world) and take the necessary steps to ensure the proper materials, sizes/thickness, strength, length and fittings are used for every installation we complete.  In addition, proper tubing installation guidelines are followed with regards to minimum straight lengths, support tubing, and tubing welding.