||Hourmeter maximum hour reading is 99,999.9. For sending unit options, please see the Senders & Sensors and Accessories sections. All electrical tachometers listed in the table above (including those equipped with hourmeters) can be operated on either 12 volt or 24 volt systems by using an instrument light bulb of the appropriate voltage. 12V or 24V light kits also sold separately, reference P/Ns 06215-00 (12VDC) and 06294-00 (24VDC). For panel kits and other options, please see Accessories section. See other sections for matching speedometers & 2” gauges.