Founded in 1951, Howell Instruments offers a range of engine monitoring and testing services to the aircraft industry. It offers the JETCAL analyzer, which assists in the testing of J47 engine temperature systems on the B-36 bomber. The company offers products and services for military and commercial corporations. It also manufactures and distributes digital instruments, engine trimmers, test sets and computer-based data acquisition systems. The company operates a service repair center, as well as maintains a referred engine diagnostic data. It provides a software program for conducting gas path analysis. In addition, Howell Instruments offers a variety of ground support equipment that includes auxiliary power unit, environmental control system, and brake and hydraulic pressure testers.