A hubodometer (aka hubometer) is a device that attaches to a truck or trailer axle to record distance traveled (typically miles or kilometers). This data can be used for scheduling maintenance, determining lease charges, calculating costs per mile, and more.
Howard G. Engler, co-founder of The Engler Instrument Co, is credited with creating one of the first hubodometers (patent 2,538,274).
Stemco releases DataTrac, the first hubodometer with no moving parts (patent 6,940,940).
Stemco releases an improved version of the DataTrac Hubodometer which utilizes two 3-axis accelerometers (patent 8,352,210).