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.