Aetna Engineering
https://www.aetnaengineering.com/
Aetna Engineering was founded in Van Nuys, California in 1968. The first Aetna digital tachometers were used for “Predicted Log Racing.” Today Aetna Engineering is located in Grand Rapids, Michigan and Aetna’s digital tachometers are in use on boats, ships and in industrial applications worldwide.
Aetna Engineering’s digital tachometers are designed to measure precise engine RPMs for efficient engine performance. Every digital tachometer is guaranteed accurate to one RPM and provides for effortless synchronization of multiple engines, eliminating the need for a separate synchronizer indicator.