This is a really nice Inclinometer and fully programmable:
http://www.innovatemotorsports.com/x...cat=267&page=1
Product Description
The RAD-1 is a precise Digital Inclinometer that features user-programmable maximum safe angles, and a progressive warning tone (like a backup warning). The display shows X (Grade) and Y (Side-slope) angles and stores max values, but it's the audio warning that really makes it useful. If you ever go off-road, you'll be surprised and amazed by how useful this meter is.
Important Disclaimer: This product will in no way intervene and prevent a rollover. It may warn you when you approach extreme or potentially unsafe angles, however, every vehicle is different, as are the terrain, environment and the driver. No device can do more than give a visual and audible warning in regard to angles. Safe driving is up to you, the driver. This device is a tool and a gauge, and it is meant to inform (and entertain) you as you learn about your vehicle.