Superior Labs Inc. is pleased to announce the appointment of Pacific Southwest Instruments (PSI) as exclusive worldwide distributor (effective October 7th, 2011).
As exclusive distributor, PSI will handle all sales activities including communications with customers on logistics and technical services. This move is expected to improve customer service, product availability and allow SLI to focus on expanding production, while maintaining our superior high quality standards to meet the recent high level of demand.
To place an order for SLI aircraft tachometers, please contact Pacific Southwest Instruments at 1-800-621-1736.
Aircaft Instruments by SLI Tachometers
Superior Labs Inc (SLI Tachometers) - About Us
Superior Labs is a leading manufacturer of precision avionics that is based out of Hot Springs Arkansas.
Since 1977, SLI Tachometers has produced the most accurate aircraft instruments on the market for airplane manufacturers such as:
American Champion, Beech, Bonanza, Cessna, Cirrus, Diamond, Maule, Mooney, Piper and various other small aircraft companies, including lightweight & experimental airplanes.
SLI Tachometers opened their doors for business in the summer of 1977, by Kim Bishop. Kim opened Superior Labs after working her entire life in the aerospace machine shop owned by her father, Cecil P. Bishop, a veteran of the US Air Force and founder of Bishop Aviation Inc.
SLI Tachometers began assembling various flight instrument components in high production at Bishop Aviation's aerospace machining company. With Cecil's engineering background, combined with Kimberly's hard work and determination, it didn't long for the Bishop family to see that they were only a few steps away from manufacturing complete aircraft instruments.
After researching the avionics industry and consulting with various OEM manufacturer's, the Bishop's discovered that mechanical tachometers were in very high demand, by the aviation industry.
Precision Aircraft Instruments Manufacturer
As a result of their quality procedures, meticulous parts and superior work ethics. SLI Tachometers grew to be a full-time business employing over 15 full-time personnel. SLI Tachometers began manufacturing precision avionics in the early eighties producing the following aircraft instruments & components:
- Mechanical Aircraft Tachometers
- Aircraft Tachometer Cables
- Vacuum Gauges
- Pressure Switches
- Flight Clocks
& hobbs meters for the OEM market, including most of the leading single engine aircraft manufacturers like:
- Beech Aircraft
- Cessna Aircraft
- Cirrus Design
- Commander Aircraft
- Diamond Aircraft
- Mooney Aircraft
- Piper Aircraft
Fast-forward the clock thirty five years later and SLI Avionics is now considered a pioneer in the avionics industry. Superior Labs is still located in the same manufacturing facility that Kimberly and her father built by hand, many years ago. The daily operations are overseen by Kimberly and managed by her own daughter, Bridgett. SLI Tachometers is a woman-owned & family-operated business with 3 generations of aviation heritage.



