Heavy-duty Hourmeters are ideal for industrial, specialty vehicle & aircraft applications . The escapement-controlled DC hour meters are electrically powered with jewelled movement, shockproof odometer and permanently lubricated parts. Accurate to 1% under all operating conditions from -65. The 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. They 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 and reliable hourmeter.