Series 7500/7600 Multifunction Meter combines a digital LCD Engine Hour Meter, Tachometer, Fuel Flowmeter, and Fuel Totali zer in a single 3-3/8" diameter instrument which fits the panel space of a standard tach. A popular option is to replace the existing tach(s) with thi s system thus eliminating the need to cut new holes in the panel. Diesel Model Features Fits most diesel engines rated from 25 hp to 4 300 hp. Twin diesels require two separate FloScan systems. Microprocessor based electronics with 2-stage adju stable calibration of GPH & gallons used for superior accuracy. Simultaneous independent display of Engine Hour Ti me, RPM, GPH, and gallons consumed. RPM readout accurate to 1 RPM. Easily connects to existing magnetic, a/c signal generator, or engine alternator RPM pick-up s. GPH and Totalizer readings displayed in tenths of a gallon. Totalizer capacity up to 99,999 gallons. Dual color (amber/green) backlighting of LCD provi des for easy night viewing. Requires 1 SPST push button panel switch for reset ting fuel totalizer reading. Meter fits 3-3/8" panel opening (standard tac h size). Can replace existing tachs in panel. Uses Model 201/231 Series K Diesel Standard Flow S ensors which are designed for feed and return flows in the range of 0.3 - 48 GPH . Standard Flow Sensors incorporate 1/4" NPT female inlet and outlet ports with 1 PSI or less pressure drop at rated flows. Uses Model 233/236 Series K Diesel High Flow Senso rs which are designed for feed and return flows in the range of 30 - 400 GPH. Hig h Flow Sensors incorporate 1" NPT female inlet and outlet ports with 1 PSI or le ss pressure drop at rated flows. To determine the model for your engines please e-m ail firstname.lastname@example.org or fax (206) 523-4961. Tel: (206) 524-6625.