Help! What do I need to buy?

Need some help deciding what you need to buy to make your OneGauge system work?
Or want some guidance on which sensors to purchase and what they do?
Use this checklist before buying to make sure that you have everything you need.
Explore options below, and if you still have questions, feel free to email us at info@theonegauge.com. 

Temperature Sensors

The temperature of your vehicle’s coolant, oil, and other fluids are some of the most critical sensors. You can choose to continue to use your factory instrument cluster or gauge, but a OneGauge temperature sensor will provide a more exact idea, updated to the second, of your fluid temperatures. In order for the OneGauge to display the correct temperature reading, a OneGauge compatible sensor MUST be used. All sensors sold on the OneGauge website are compatible with OneGauge, but no others are guaranteed. 

When purchasing a coolant temperature sensor for OneGauge, you’ll need to need to be able to answer the following questions:
1. Analog or Digital?
-Analog sensors come standard in most vehicles but are not as accurate. You MAY be able to choose to continue to use your current analog sensor but it will not be able to be plugged into your stock instrument cluster/gauge. Some vehicles have a port for a second temperature sensor, but not all.
-Digital sensors can be purchased from OneGauge. These are more accurate than analog sensors.
2. Sensor size: If purchasing a sensor from OneGauge, you’ll need to know the thread size of your port. Often a little internet research can tell you the size of your coolant temperature sensor port. Common sizes include 3/8″ NPT, 1/8″ NPT, M14x1.5, M16x1.5, and others.

Oil Pressure Sensor

Pressure sensors, such as oil pressure, also measure critical elements of engine health. Like coolant temperature, most vehicles come equipped with an oil pressure sensor and many with an oil pressure gauge. Typically an additional pressure sensors can be added by using a tee, but there is also the option to remove the factory sensor and replace it all together with a OneGauge sensor. In order for the OneGauge to display the correct temperature reading, a OneGauge compatible sensor MUST be used. All sensors sold on the OneGauge website are compatible with OneGauge, but no others are guaranteed. 

When purchasing a transmission temperature sensor for OneGauge, you’ll need to need to be able to answer the following questions:
1. Analog or Digital?
-Analog sensors: Analog sensors come standard in most vehicles but are not as accurate. You MAY be able to choose to continue to use your current analog sensor but it will not be able to be plugged into your stock instrument cluster/gauge. It is typically relatively simple to add an additional oil pressure port.
-Digital sensors can be purchased from OneGauge. These are more accurate than analog sensors.
2. Sensor size: Most oil pressure gauge ports are 1/8″ NPT, M10x1.0, or M12x1.0, but you will need to confirm the size of the port on your engine.

Vacuum Sensor

Vacuum gauges monitor manifold vacuum and can help give the driver an idea of fuel efficiency. Vacuuming gauges come attached to the OneGauge Hub, so all that is required for installation is running a vacuum hose from the manifold to the Hub.

Speed, Altitude, and Compass Direction

To include Speed, Altitude, and Compass Direction readings into your OneGauge dashboard, you’ll need to purchase a OneGauge Hub with a GPS built in.

Fuel Pressure

A fuel pressure sensor can be used on carbureted or EFI vehicles to monitor the health of components in the fuel system. Fuel pressure sensors are 1/8″ and are installed in-line between the fuel pump and the carburetor or fuel rail. A fuel pressure sensor is required as well as a tee to split the fuel line.

Fuel Flow and Temperature

Like a fuel pressure sensor, a fuel flow sensor, which also includes the fuel temperature sensor, is installed in line before the fuel is delivered to the engine to monitor the speed at which fuel is flowing to the engine. This sensor is critical to four different measurements: fuel flow (in gallons per hour), fuel temperature, current miles per gallon, and average trip miles per gallon. Current MPG and Average MPG also require a OneGauge Hub with GPS. 

Note: The fuel flow sensor is only meant to provide an approximation of fuel flow and will not provide precise mileage estimates. An EFI system would provide a much more accurate estimate of fuel usage. 

Vehicle Tilt

To measure vehicle tilt, including roll left and right or pitch forward and back (a.k.a. incline), you’ll need to purchase the OneGauge Hub with the built-in accelerometer. No additional installation is required.