TM Series

The TM Series hourmeters record the operating time of vehicles or powered equipment. They are electromechanical and have a quartz base time counter that ensures 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 shock-proof and tamper-proof, totally 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 and reliable hourmeter. The TM612/624 model includes a three-hole mounting shock ring for extreme shock protection.

These hourmeters can be used on any engine where operating time needs to be recorded. All it requires is a DC power source (refer to Specifications).


  • Solid-State Electronic Drive Circuit
  • Quartz-Crystal for Accurate Timing
  • Quiet Operation – Permanently Lubricated
  • High-Impact, Tamper-proof Plastic Case Sealed Against Moisture and Dirt
  • Indicates Operating Time in Hours and Tenths
  • No Battery Back Up Required
  • Made in the U.S.A.

6-Digits Hourmeters
Model           Bezel Type
TM4592        Bright Stainless Steel Bezel
TM4593        Black Stainless Steel Bezel
TM4594        SAE Bright Stainless Steel Bezel
TM4595        SAE Stainless Steel Black Bezel

5-Digits Hourmeter with Shock Ring Mounting 
TM612/624   3-Hole Mount, Black Bezel