The TM Series hourmeters record the operating time of vehicles or powered equipment. They are electromechanical and have a quartz base time counter that insures accuracy (better than ±0.02% over the entire range). They can record up to 99,999.9 hours (9,999.9 for TM612/624) and include an automatic recycle to zero hours feature.

The TM Series models have a shockproof and tamperproof sealed case made of an engineered plastic.

These small, lightweight time meters are rugged and durable. They are the answer to applications requiring a low DC power, reliable hourmeter. The TM612/624 model includes a 3-hole mounting shock ring for extreme-shock protection.

The tachometer is a rugged, transistorized instrument with solid-state circuitry for indication of engine revolutions per minute (RPM). It is equipped with a bracket for mounting into a standard 3-3/8 in. (86 mm) dash mounting hole.

The tachometer’s full 270° sweep of the pointer gives an accurate indication on a large easy–to–read scale. The dial can be illuminated for night reading. The models equipped with tachometer and hourmeter also record the elapsed running time of an engine.

The Selectronic MT90 digital tachometer offers high accuracy and dependability resulting from use of a quartz crystal time based and digital, solid-state electronics. The MT90 tachometer also has back-lighting for easy readings in low lit areas; this lighting requires a battery power source.