Invicta MK1 Clinometer

I bought this out of interest to measure the heights of trees as I do a lot of forestry work. It was relatively cheap and could be used for other measurement such as the pitch of a roof or framing.I tried it on a huge Elm tree that had died from Dutch Elm Disease. I set the machine at 45 degrees and walked back from the tree until the pointers lined up to the top of the tree. Because a right angled triangle with sides at 45 degrees must have an equal base and height, I knew that my distance from the tree would be the same as its height.I had some very sceptical felling contractors when I told them it worked out at 64 feet high. So we had some bets and when it came down it turned out that I was wrong as it was only 63 feet high! But I did win several pints, unfortunately no pubs to drink them in!

A nice item, cheap but serviceable

Children will find it useful and easy to use

It works. It is sturdy. Clear instructions. Reasonable price. I am measuring my trees.

good device, bit plasticky, tricky to use as you have to freeze the swinging of the disc under gravity, but works is used carefully

Used this to check pitch on roof for building works. Also worked out height of building using the math.

Good piece of equipment for schools teaching trigonometry

Very fast delivery and the product worked I expected. Overall, very good clinometer.