Sensor Technology Engineering is a leading brand in the field of radiation detection and monitoring. Founded in 1996, the company was born out of a need for effective radiation detectors to be distributed among law enforcement and first responder personnel. Their flagship product, the Radiation Pager, quickly gained recognition and became widely used by U.S. federal agencies, state and local organizations, as well as international allies. Building on this success, Sensor Technology Engineering expanded its product portfolio to include the Handheld Radiation Monitor (HRM), Linear Radiation Monitor (LRM), and the RadPack Max.

The company's philosophy focuses on creating reliable, rugged, and easy-to-operate sensors that require minimal training and have a long operational life at a low operating cost. To maintain high sensitivity, Sensor Technology Engineering uses top-quality detectors like large Cesium Iodide crystal scintillators for gamma radiation and high-pressure Helium-3 tubes for neutron detection.

Based in Santa Barbara, California, Sensor Technology Engineering was acquired by the HEICO Corporation in 2018. HEICO is a U.S. company with a primary focus on aerospace technologies and manufacturing. As a part of HEICO, Sensor Technology Engineering continues to innovate and provide cutting-edge radiation detection solutions.