Display running time on a machine so you can schedule preventative maintenance. These counters have two displays. One display shows the total running time and cannot be reset; the other shows the time elapsed since the last maintenance and can be wired for remote reset.

Record the running time of machines and vehicles that vibrate while operating. These meters are battery powered, so they don’t require any special wiring or external power source.

No need for a separate power source—these hour meters are powered by internal batteries that last more than 10 years. Often used where power sources aren’t easily accessible, they work well in remote monitoring systems, industrial equipment, and machinery. Wire the hour meter to a relay or switch on your machine so it can receive signals when the machine is running. The total number of hours is shown on the display. Press a button on the meter to reset the time to zero or connect it to a switch or button to reset it from a distance.

Gaskets—Mount them with a gasket (sold separately) to protect against dust, water, and splashing oil and coolant and so they’ll meet NEMA 4/4X, NEMA 12, and IP66 ratings.

Continuously measure the speed and running time of your engine to monitor its performance and detect mechanical issues early. These meters can be programmed based on engine run time to light up for maintenance reminders, such as oil changes, filter replacements, and inspections. Wrap the signal wire four to five times around your spark plug to secure it in place. They’re battery powered, so they will start showing readings as soon as you turn on the engine. It adjusts to nine different engine types for accurate readings.