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Air Damped Compasses: No Liquid, No Leaking, No Air Bubbles
Ultra-low friction bearing with a highly magnetized compass needle
- 20 mm (0.790 inches) in diameter
- 7.25 mm (0.285 inches) thick
- 1.4 grams (0.05 ounces)
- Pack of One Dozen (12 pcs)
One Dozen Air-damped Plastic Compasses
Great for survival kits, school science projects, hobbies, or inlaying into walking sticks or rifle stocks
These inexpensive plastic compasses are perfect for educational science projects, hobbies, or inlaying into walking sticks or rifle stocks. The compasses feature an ultra-low friction bearing and a highly magnetized compass needle for fast and precise compass readings. The low cost compasses are 20 mm (0.790 inches) in diameter, 7.25 mm (0.285 inches) thick, and weigh only 1.4 grams (0.05 ounces).
Single 20 mm Compass Next to Ruler
Single 20 mm Compass Held Between Thumb and Forefinger
Single 20 mm Compass On Fingertips
Close Up of Single 20 mm Compass
Customer
Reviewed in the United States on January 29, 2025
Make sure you are outside and not around nothing metal. Some will work okay and some drag so badly they don't work and are unusable. But when you do find a few in the batch that does work they are fairly accurate.
David Henderson
Reviewed in the United States on September 1, 2024
The compasses work but very cheap in construction. For the 5 I have tried to install 3 came apart with almost no pressure. Cheap plastic construction
CL
Reviewed in the United States on September 14, 2022
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John Barr
Reviewed in the United States on April 15, 2022
These compasses won't take consistent readings, and are off by 45 degrees or more in either direction - for the same compass. Sometimes the needle is stuck 90 to 180 degrees in the wrong direction, and sometimes wiggling it fixes it and sometimes it doesn't.Totally useless and not fit for even cardinal directions.
Elizabeth
Reviewed in the United States on December 6, 2020
Mine all pointed north. You are getting what you pay for here. As described, they are very small, about the size of a nickle. They are pretty sensitive and shake quite a bit in your hand. I used them for 1st and 2nd grade Girl Scouts on our first attempt using compasses. Since our budget is nearly non-existent, these were perfect for that. Definitely not for use in actual orienteering, but if you're lost or navigating basic trails, will point you the right direction.
jhkjh
Reviewed in the United States on December 29, 2020
I think these are great inexpensive compasses. My favorite thing about them is they don’t have a fluid in then, so they won’t develop bubbles and become worthless over time. I also like that they have bearing callout on the bottom, so you can use it to find a bearing (something you can’t do with most button compasses). I had two that were off by 180 degrees.I love placing these in bags jacket pockets etc. so that I always have a compass available.I have used these for urban navigation, and they are great. I will come out of a subway, or train have a quick glance and orient myself. I have also found it useful for picking the right exit in a subway. If I’m going in a large building I’ll note which direction I’m entering in, and if I get turned around it is hand for finding a way out. It is also great for navigating on the street. You can use it to orient your map, and I’ve gotten crude bearing estimates to with the features I can see in the distance (like the Eiffel tower) and on the map.For something so simple it is surprisingly useful. And it does not stick out like pulling out a Commenga or breast plate compass would in a city. Obviously it’s not a good pick for navigating through a dense forrest though.
Al
Reviewed in the United States on August 2, 2017
For what it is it works. It points North. But to use it you have to stop; set it down on a stable flat surface - or hold it on the back of your hand VERY, VERY STEADY. Just takes a little getting used to. It is not a quick-reading compass that you can use while walking or on the move. The needle jiggles too much. But when the chips are down it will do. They have numeric markings you can use; if you have a small flashlight. UV really makes it visible. It's a "that-a-way" compass: You still actually COULD get navigation out of a button IF you set it out on the ground and scratched azimuth lines N,S,E,W - and then divided those into degrees and compass bearings; but for quick urban navigation with a dry compass I would go with a baseplate: They use a more expensive bearing that doesn't jiggle around as much. For something small, a liquid-filled pin-on ball compass is what I find works best - it's only that little bubble that annoys me - but it has no effect on accuracy as long as the compass dial floats, and it dampens the compass card; so you can use it on the move. But it works way better at giving you stable compass reads than anything else comparable in size and you can wear it. This is smaller and flatter but it's your second back up, and much better than moss on a tree.
Homeschooling Mama
Reviewed in the United States on November 18, 2015
We needed about 40 compasses for our homeschool group that actually worked! But we only needed them for a few lessons, so I didn't want to break the bank for something that wouldn't be used again. These compasses are tiny - but work perfectly. I found them perfect for kids and perfect for what we needed them for (a nature walk). Would buy again!
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