The Inclinometer is an electronic device that measures the incline of a vehicle. It is designed to communicate and share information with the onboard vehicle computer. Designed for installation on the external chassis frame environment, it is packaged in a rugged housing designed to withstand severe environmental conditions.

It measures the acceleration forces on the vehicle in three axes (x, y, z) as well as the rate of change of the angular position of the vehicle, also in three axes, using a built-in MEMS. An embedded processor computes the current pitch and roll angles based on these raw inputs. The resulting information is filtered to reduce effects of the chassis vibration bounce to provide a best fit estimate of the current road slope in the direction of travel (pitch) and perpendicular to the direction of travel (roll).

Composed of an electronic control module using a 6-state MEMS sensor that will determine the current road grade (angle in degrees). The information is compiled and sent to the vehicle's ECU over J1939 CAN connection.

Images of Index's J1939 Inclinometer

How to Order

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Customer support representatives are available to assist you with your order. They can answer your questions about orders in process and the availability of new or existing products. Reach our representatives toll free at (800) 726-1737 or via email:

Original Equipment Manufacturers (OEMs)

Index provides components and custom-engineered products to OEMs in a variety of fields: heavy-duty highway (truck & bus), automotive, construction, agriculture/lawn care, marine, defense, and assorted industrial applications. If your company is an OEM or if you need particular performance characteristics or design features for your application, give us a call at (800) 726-1737 or contact us via email at:

Aftermarket Independent Distributor

In addition to OEM distributors, our products are also carried by independent heavy-duty parts distributors all over the world. Some parts can be rushed for next-day delivery. Contact us to locate a distributor near you.

Aftermarket Heavy Vehicle Dealers

Index parts are carried by OEM dealers and distributors. Contact your local OEM truck dealer to purchase.