Electrical 24 volts tachometers are found on this page. Each 24 volts electrical tachometer is designed to withstand the most demanding heavy duty applications found on diesel engines such as Detroit Diesel. Below you will find different type of electrical tachometers. Electrical tachometer 24 volts has a black color background, chrome plated rim and red needle for easy reading of the engine RPM reading. All our 24 volts electrical tachometers come with a 100% money back guarantee and 24hr worldwide shipping direct to you.