Welcome to Sandelius Instruments. Since 1956 our name has meant reliability and quality you can trust. We design and manufacture all types of thermocouples, Thermowells, RTD's, and Multipoint bundles.

We specialize in high pressure thermocouples, high velocity thermowells and severe corrosion/erosion applications. If you need a specially engineered item Sandelius has the design expertise to meet your temperature measurement needs.

Our business philosophy is to provide you with trustworthy technical support to insure you get quality products, on time and at a competitive price. Our goal is to earn your business for the long term.

Our Quality Assurance program insures repeatable quality with an on going commitment to ISO 9000 and a proactive approach to employee training and education.

Our employee family is made up of exceptional individuals dedicated to customer satisfaction and the growth and health of our company. With a very low employee turnover rate we can truly boast that our many years has made us experts in the field of temperature measurement.

Additional products include thermocouple wire & cable, thermocouple accessories, Bi-metal & Gas Actuated thermometers and analyzer Sample Probes. Please take a moment to click on our Affiliates page for information about TexCo Trim and TexCo Valve. These "sister" companies manufacture replacement parts for severe service control & checkvalves.