Hobbs Hour Meter (301321)

Hour meters are used to monitor engine and airframe hours. They are electrically powered with jewelled movement, shockproof odometer and permanently lubricated parts. They may be wired in two ways, to be active as soon as the master switch is switched on OR via a pressure sensitive switch that activates the unit when the oil pressure rises above about 5PSI.

They feature a total digital readout to 9999.9 hours. Easy-to-read white numerals on black face dials.