Profile: Quality Control Thermowells produces thermowells, thermocouples, and other devices & parts. We specialize in the design and manufacture of thermowells & accessories for the detection of all types of temperature. Our thermowell designs are available in various types and basic styles to be used within the industry for the protection of thermocouple elements. We also offer special construction or modify existing types. Our Type N nickel-based thermocouple alloy is used in high temperatures up to 2300° F. The Type J thermocouple may be used, exposed, or unexposed, where there is a lack of free oxygen. The Type E thermocouple is suitable for use at temperatures up to 1650° F. Our thermowells are available in various types including standard bi-met, standard straight, socket-weld, ground joint, sanitary, flanged, tapered, and sample probe thermowells. The thermowells are designed to protect a temperature sensor from an adverse environment. These are available in many configurations and materials. Our in-house machine shop capabilities enable us to meet almost any emergency need.