Important measuring devices in automobiles

1. Speedometer2. Tachometer3. fuel gauge4. water temperature gauge5. oil pressure gauge6. Oil Temperature Gauge

Speedometer

The first speedometer was built in 1923 and its basic design didn't change significantly for 60 years.

The job of the speedometer is to indicate the speed of your car in miles per hour, kilometers per hour or both.

Types of Speedometers

There are two types of speedometers.

1.mechanical speedometer, or the eddy-current speedometer.

2.Electronic.

How Speedometers Work

1. To measure the speed of a car, one must be able to measure the rotational speed of either the wheels.

2. In most cars, measurement takes place in the transmission.

3. drive cable used to measuring the rotational speed generated by the transmission .

Ref: William Harris http://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/speedometer2.htm

Tachometer

1. Tachometer is designed to give the speed of a rotating part in (rpm)

2. For car use the tachometer to measuring the speed of the engine

Ref :http://www.simonfamily.us/FocusEV/TachSpeedo.htm

Fuel gauge

How Fuel Gauges Work

Ref :http://auto.howstuffworks.com/fuel-gauge.htm

water temperature gauge

How water temperature gauge Work

oil pressure gauge

Important of oil gauge

If the oil gauge gives very low reading it means that your oil pressure has dropped.

When the oil pressure drops the oil is not forced into the nooks and crannies .

Oil Temperature Gauge