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, RTDs, and multipoint assemblies. In addition to our core product lines, we also provide thermocouple wire, sensor accessories and fittings, bi-metal and gas actuated thermometers, and sample probes. High pressure thermocouples, high velocity thermowells and severe corrosion/erosion applications are some additional examples of the dynamic nature of our supply scope. We specialize in custom temperature application design, exotic alloys and coatings, emergency rush order support, and weekend or after-hour deliveries.

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 of experience have made us experts in the field of temperature measurement. Our quality assurance program ensures a proactive approach to employee training and education while maintaining the high level of repeatable product quality our customers have come to expect.

If there is a specific application that you are unsure about or need assistance with, please let us know and we will be happy to help. We enjoy being a valuable design resource for our customers and thrive on the opportunity to find creative solutions to unusual or complicated temperature measurement challenges.