Gauges & Instrumentation

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Aeromotive Fuel Pressure Gauge – 0-100 Psi, Black

Aeromotive Fuel Pressure Gauge – 0-100 Psi, Black

A fuel pressure gauge designed to mount to a fuel pressure regulator with a 1/8 NPT gauge port. The easy to read white dial face with black numerals is available in 2 pressure ranges. This Aeromotive Fuel pressure guage measures 0-100 PSI.View more

$54.63

1 retailer

Aeromotive Fuel Pressure Gauge – 0-15 Psi, Black

Aeromotive Fuel Pressure Gauge – 0-15 Psi, Black

A fuel pressure gauge designed to mount to a fuel pressure regulator with a 1/8 NPT gauge port. The easy to read white dial face with black numerals is available in 2 pressure ranges. This Aeromotive Fuel pressure guage measures 0-15 PSI.View more

$54.63

1 retailer

AEM Electronics Analog Oil/Transmission/Water Temperature Gauge 40-148 Degrees, Black,White

AEM Electronics Analog Oil/Transmission/Water Temperature Gauge 40-148 Degrees, Black,White

The AEM analog style oil/transmission/water temperature gauge features a quick response and smooth needle movement that makes it easy to read in all lighting conditions. The gauge has a 320 degree swept area which gives the best viewing resolution at almost any angle. A high speed electronic stepper motor delivers lightning fast precision needle movement making this gauge one of the fastest and most accurate you can buy.The included sensor provides accurate temperature readings from 40-148 degrees which can quickly alert you to any engine damaging rises in temperature. The AEM gauge features seven backlight colours that allow you to match the gauge to your vehicle, each gauges comes with a black and silver bezel and a black and white faceplate allowing your to customize the gauge to match the interior of the vehicle.View more

$203.89

1 retailer

AEM Electronics Boost Display Gauge -30 – 35 psi, Black,White

AEM Electronics Boost Display Gauge -30 – 35 psi, Black,White

The AEM analog style boost display gauge features quick response and smooth needle movement that is easy to read in all lighting conditions. The gauge offers a swept area of 320 degrees for the best viewing resolution at every angle. Using precision high speed electronic steppers in the gauges makes AEM's boost gauges are the fastest moving and most accurate gauges available. The included sensor provides accurate boost readings for the gauge. The analog style gauge features seven back light colours that allow you to match the gauge to any other gauges in the vehicle, it also comes with a black and silver bezel and black and white faceplate allow you to change both to your desired colour choice. The back light is adjustable via a dial on the rear of the gauge which makes viewing the gauge easy in all lighting conditions. View more

$196.22

1 retailer

AEM Electronics Digital Boost Gauge -30 – 35 psi, Black

AEM Electronics Digital Boost Gauge -30 – 35 psi, Black

The AEM Digital boost display gauge combines unsurpassed accuracy, speed and control with an easy to read digital LED interface that displays boost in 1 PSI increments, and a sweeping LED "needle" that lines the edge and moves as boost from -30 to 35 psi. The boost gauge's digital readout automatically increases and decreases in intensity due to the built in ambient light sensing photcell.The AEM gauge includes a 0-5v analog output which can be used with data loggers and most engine management systems making it ideal for users who want to monitor and data log boost at high RPM on tuned vehicles. Each gauge comes with interchangable silver and black bezels and black and white faceplates so you can personalise the look of your gauge. View more

$181.83

1 retailer

AEM Electronics Digital Oil Pressure Gauge 0-150 PSI, Black,White

AEM Electronics Digital Oil Pressure Gauge 0-150 PSI, Black,White

The AEM digital oil pressure gauge has unsurpassed accuracy, speed and control with an easy to read digital LED interface that displays oil pressure in 1 PSI increments with a sweeping LED needle that lines the edge of the gauge and moves as the oil pressure increases or decreases. The oil gauges digital readout automatically increases or decreases in intensity due to a built in light sensor. The AEM oil gauge includes a 0-5v analog output that can be used with data loggers and most engine management systems. The gauge is suitable for carburated or EFI vehicles. Each gauge has a 52mm housing making it suitable for most gauge pods.Every gauge has interchangeable silver and black bezels and black and white faceplates that allow you to personalize the look of your gauge to match the interior of your vehicle.View more

$235.27

1 retailer

AEM Electronics Digital Oil Temperature Gauge 100-300 F, Black,White

AEM Electronics Digital Oil Temperature Gauge 100-300 F, Black,White

The AEM digital oil temperature gauge has unsurpassed accuracy, speed and control with an easy to read digital LED interface with a sweeping LED needle that lines the edge of the gauge and moves as the oil temperature increases or decreases. The oil gauges digital readout automatically increases or decreases in intensity due to a built in light sensor. The AEM oil gauge includes a 0-5v analog output that can be used with data loggers and most engine management systems. The gauge is suitable for carburated or EFI vehicles. Each gauge has a 52mm housing making it suitable for most gauge pods.Every gauge has interchangeable silver and black bezels and black and white faceplates that allow you to personalize the look of your gauge to match the interior of your vehicle.View more

$194.18

1 retailer

AEM Electronics Wideband Fail Safe Gauge, Black

AEM Electronics Wideband Fail Safe Gauge, Black

The AEM wideband fail safe gauge provides the ability to accuratley tune your air/fuel ratio gauge while protecting your engine by monitoring the air/fuel ratio curves and activating a user defined failsafe if the car is running lean. The wideband failsafe is a UEGO controller with an internal boost sensor (up to 29PSI), an internal data logger and a full colour OLED display. This gauge is a must have for all tuned performance engines as it can trigger a user defined output function that can save an engine from catastrophic damage. The gauges failsafe is completely user definable from making the gauges flash to using the output to trigger a check engine light in order to cut boost, retard timing or even switch to a safety map using a standalone engine management system.The gauge comes with a black and silver bezel and 6 interchangable faceplates:Black Vacuum only in sweeping LEDsBlack and White AFR in sweeping LEDsBlack and White Vacuum/Boost in sweeping LEDsBlack Lambda in sweeping LEDsView more

$370.55

1 retailer

AEM Electronics X Series 35PSI Digital Boost Display Gauge, Black

AEM Electronics X Series 35PSI Digital Boost Display Gauge, Black

The AEM X series digital boost display gauge combines incredible looks increased readability and new easy to use features. This gauge is perfect for users who want highly accurate boost pressure readouts up to 35 PSI.The gauge has a 87% larger LED display than AEM's original digital gauges which provides better readability and a sweeping green LED needle that lines the edge of the gauge for quick reference. Even though the gauge has a larger display it is contained in a standard 52mm diameter housings to mount in standard gauge pods, the gauge can also be mounted anywhere due to its slim overall depth of under 0.825 inches. The x series digital gauges has two buttons on the faceplate to deliver programmability for peak/recall, standard or metric center LED readout and sweeping LED needle, and user-selectable threshold warnings. The gauges are AEMnet CAN-bus enabled, so they can be daisy chained together for use with the Infinity ECU, Series 2 EMS, AQ-1 Data Logger, or 3rd party EMS or logger that accepts AEMnet. 0-5V analog outputs are also included for inputting into data loggers and engine management system.The gauges comes with a black bezel and reversable black PSI/BAR boost pressure faceplate.View more

$206.46

1 retailer

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Car Gauges

How Various Gauges and Instrumentation Work

Gauges and instrumentation fitted on any vehicle’s dashboard make essential components for making different measurements. The gauge is specifically used for displaying dimensional information using a pointer or a needle that moves along a calibrated scale. It measures the physical quantity of an item, e.g., the gap in space, pressure of flow and diameter of materials, among other parameters. Various tools are used to make these measurements, which can be simple and complex machinery. Gauges are classified into four main categories- the analogue instrument meter (with analogue display), digital instrument meter (with analogue display), analogue instrument meter (digital display) and the digital instrument meter (with digital display). Analogue and digital meters with an analogue display are easy to read and interpret while the digital and the other two are a little complex. Digital and analogue instrument meters with digital displays are usually used in cockpit instrumentation. Vehicle instrumentation also measures different parameters of the car and is fitted in the dashboard or control panel.

Types of Gauges and Instrumentation

Speedometer

It is used to measure the rate of speed of the vehicle. Initially, the speedometer comprised a cable that rotated inside a flexible tube. On one side, the cable was connected to the speedometer, and the other end was connected to the speedometer gear transmission. This design is now dated as modern vehicles now use electronic sensors to determine the speed of the wheel and send signals to electronically driven speedometers. The size of the tires affects the accuracy of speedometers, i.e. if the tires have a larger diameter than the original size, the speedometer shows that the vehicle is going at a slower rate than it is. Improper speedometer gear transmission on older cars also affects the accuracy of the speedometer readings. Cars experience this problem when the replacement transmission is installed. Vehicles that use electronic speedometers allow technicians to make adjustments based on the size of the tires. Special equipment like the diagnostic scanner is used to perform those adjustments.

Tachometer

It measures how fast the engine runs in terms of revolutions per minute (RPM). The information comes in handy if you are using a car that has standard shift transmission and want to change to an optimum RPM for the best acceleration or the best fuel economy. It has single digit markings like 1, 2, 3 and others along with an indicator that shows RPM X1,000, which means the reading should be multiplied by 1,000 to get the actual RPM. So, if the needle points at 3, the engine is running at 3,000 RPM. The gauge also shows how fast you should race the car; higher RPMs show that the engine is working harder and the fuel mileage is also pretty high. Usually, the tachometer moves to the red zone, which can lead to engine damage. However, some engines have an engine computer that protects the engine from going to the red zone.

Fuel Gauge

The instrument shows the fuel consumption of the vehicle. When the tank is filled up, the gauge shows a full capacity for a long time and slowly drops until it reads three-quarter full after which it moves progressively faster to the last quarter of the tank. When the falls to below E, it means only 1 or 2 gallons are remaining, and the tank needs to be filled up. Car owners should not let the tank to drop below a quarter. Usually, the fuel pump is submerged in fuel in the tank to keep it cool. Lower fuel levels (less than a quarter) expose the pump, making it run hotter than normal. Running a vehicle with low fuel levels shortens the life of the pump and can lead to its failure especially if it starts to draw in sediments in the tank.

Voltmeter

It is used in modern automobiles using electrical systems. Usually, fully-charged batteries show 12.5 volts if the engine is not running. When the engine begins to run, the charging system takes over, and the voltmeter indicates 14-14.5 volts. The pointer is supposed to remain in that position unless the vehicle requires a heavy electrical load, e.g., when using the heater, wipers, rear defogger are all running at the same time. Such uses can cause the voltage to drop below 12.5, which means the battery is using some of its current. You may also notice that the dash lights become dim and if the vehicle runs at this voltage for a long period, the battery runs down further and may cause the car to shut off. Vehicles continually running below 14 volts should be checked, and if the voltage exceeds 15 volts, then the voltage regulator has a problem. Be sure to check the system for overcharging as it can damage the electrical system.

Warning Lamp Gauge

It measures the pressure of the engine oil in pounds per square. Most vehicles are fitted with an oil lamp that signals when the oil pressure is extremely low. Thus, if it lights up when driving, you should stop the car and shut off the engine.