A quartz crystal time base ensures accuracy in long-term electromechanical wheel-type indicators displaying up to 99,999.9 accumulated hrs. All components are housed in a weatherproof sealed enclosure that is UL, CSA, and CE recognized, and the device is manufactured to rigorous ISO 9001 quality standards. Measuring 1.6 x 1.06 x 2.75 in., units are offered in three styles for panel mounting or back-panel installation with 1/4 in. terminals or lead wire configurations. Accuracy is better than ۪.02 percent over the entire range, and operating temperature is -40° to +185°F. Typical applications include medical, recording, testing, and other equipment that uses predictive maintenance or time-in-use schedules.