Sun CompanyLev-o-gage II - RV Levels (2-Pack) - Made in USA | Leveling System for RV, Camper, or Pop Up Trailer | High Visibility Ball Level (No Bubble)

Simple, rugged, easily readable, "nothing to go wrong". It's not a precision inclinometer but that should be obvious. It's in the stone age "crude but effective" category. .......I'm designing wheelchairs and scooters and need to know what grade the hills are. Installed this on my scooter handlebar and now I have a quick answer to the question. It also serves an accelerometer, once you understand its dynamics. The engineers probably tried to achieve critical damping but the physical characteristics of the system can't be reduced to a simple second order solvable problem so they did the best they could with the design.As others have reported, the ball does often exhibit a little bit of stiction. Not really a problem as long as you understand what's happening. If you're on a moving platform measuring grade (such as what I'm doing) slope should be measured both uphill and downhill then take the average to cancel offset errors. If you're on a stationary platform such as leveling an RV, make sure you have the thing installed precisely horizontal using a real bubble level, and always tap the thing when taking a reading.

Good price, double sided tape was provided and adequate. Does the job and is easy to read

Added these to our travel trailer on the back and passenger sides. I use them as quick reference points and this allows my wife who spots me backing up to gauge how much leveling we need to do before I get out of the vehicle. Quick sticky applications on the back. Easy to work with. No bubble so shouldn't freeze in winter storage. These do help out but I would still verify with another method prior to fully disconnecting. I have noticed at time the passenger side one says were are level front to back but the bubble gauge tells us we are off a little. Very minor differences but are noticeable enough to warrant a second verification method. Overall would recommend for a quick reference for the spotter. Might save you time and stress with those more uneven sites out there.

I bought these to add to my truck camper to help with leveling. Keep in mind that whenever my camper isn't mounted on the truck it needs to sit level on the jacks, or close to it. Doing that prior to adding these mini-levelers was a bit of a pain as I needed a level and spot to measure from each time. Sticking these on the back corner of my camper has made this job much easier. They have proven to be accurate, durable, easy to read and the adhesive has held up well for 2 years now. I'm very satisfied with this purchase.

Installed on our 5th wheel, high vis makes it easy to see how level (or unlevel) our sight it easy to install

The media could not be loaded. Update 8/8/24: I've increased my rating from 1 star to 3 stars. The increase is due to exceptional customer support. Today, I received an unsolicited message from the seller saying the following, "We sincerely apologize for any inconvenience regarding your order and would like to offer you a full refund for your purchase." They did this proactively as a result of my review, which I was not expecting. I really appreciate a company that stands behind their products. Original review: I'm honestly not sure why people like these so much. Perhaps I got a dud, but I see other reviews saying the same thing as me. I mean, it looks cool, but I don't find the sensitivity or precision to be nearly as good as a traditional bubble level. I attached both this and a bubble level on a horse trailer, and the lev-o-gage consistently took quite a bit more of an elevation change for it to register any change, versus the bubble level, which moves anytime there was even a small change in elevation. The video shows about an 8" change in elevation of the hitch (significantly off level), but there was no noticeable change in the lev-o-gage, as compared to the bubble level. I even tried tapping on it, but it still didn't move. I find myself fully relying on the bubble level rather than the lev-o-gage.

I love these because they are large and easy to see, even in the rear-view. I chose this one precisely because of the ball used instead of a bubble. It is easier to see and won't break up like bubbles can and become inaccurate. I put one on drivers side front of my RV and I can see it in my rear-view well enough to level side-to-side without ever getting out. Front to back is handled with tongue jack. They are stick on, but I also use a silicone caulk (same I use for sealing the RV) around the top to also help to keep it adhered. Not sure if it is needed, but also keeps water off the factory adhesive strip. I'd recommend these to anyone with an RV.

Great little aid when setting up a roof top tent. Very easy to check and see if the truck is ballpark level or not.No issues with the adhesive tape so far, even during the winter months. The two-pack makes these much more cost effective than some of the other models this company offers.