Superior Labs Inc. maintains a state-of-the-art production facility and at the present time engages in designing, manufacturing, testing and assembly primarily aimed at the aircraft industry.

Since 1977 they have supplied more than 30,000 airplanes with mechanical recording tachometers, aircraft tachometer accessories, aircraft tachometer cables, vacuum gauges and switches, as well as many other non-critical avionic instrument accessories.

Based out of Hot Springs, Arkansas, SLI currently manufacturers mechanical aircraft tachometers for any single piston engine aircraft from original equipment manufacturers as well as support the spares market. SLI is currently FAA approved and holds the latest revision on TSO C49b for the Mechanical Recording Aircraft Tachometer.

Superior Labs Inc. currently stocks a wide assortment of aircraft tachometers for the following aircraft: American Champion, Cessna, Diamond, Mooney and Piper aircraft.