Seven in one Diesel Engine Tester 1.RPM,Oil pressure,water temp,Oil temp,voltage,Hours; 2.Give ... can give audible & visual alarm when RPM, oil pressure,water temperature, oil temperature of Diesel engine exceed or lower than settings;(2 ... water temperature,oil pressure of Diesel engine exceed an acceptable level; Measurement:RMP: 0 ~ 9999 RPM;Water temp: -10 ~ 120°c;Give ...