AI-Tek Instruments designs and manufactures four models of dual-input, digital tachometers that are typically used with magnetic sensors as a signal source. Each model's response times are 7.6 ms (analog), 16.5 ms (mechanical relays), and 2 ms (digital relays).

Alluris manufactures, develops and distributes digital contact tachometers, digital laser tachometers with contact adaptors, digital precision tachometers, and PLaser tachometers with contact adaptors. The company's tachometers have a contact measurement of 1 to 25,000 RPM; and feature selectable measuring units for length, rotational, and surface speed measurements in metres, yards, feet and inches.