The Wonkometer tells you exactly how much to raise each wheel before you’ve even got the ramps out.
Mount the Bluetooth sensor inside your van and calibrate once on level ground. From then on, arrive at your pitch, open the free app, and it gives you precise per-wheel ramp heights in centimetres not vague arrows. No guesswork, no rolling on and off the ramps three times.
Works with campervans, motorhomes, caravans and trailers. Connects automatically over Bluetooth to the free iOS and Android app, with free updates.
In the box: Wonkometer Bluetooth sensor, quick-start guide, USB cable
Specs: Bluetooth to iOS & Android app , tilt accurate to within 0.5
not waterproof (fit in a dry location)