Would this gauss meter be any good?
Asked by
XOIIO (
18328
)
May 23rd, 2013
So, I like to grab odd things, sometimes expensive things even fi I don’t use them much, I just bought a $120 chronograph for my air canon, and have used it only a few times lol.
Well, I now put some big caps into a nice big coil I found (I’m uploading a video soon and will link it), and it pulled in (just a bit) a set of metal shears that weight 377 grams. It also shoots small metal things up a few inches into the air and I am curious how powerful a magnetic field it is making. I looked on ebay and fond this gauss meter, do you think it would be any good, or shitty since it’s a “ghost hunting” one.
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10 Answers
Oooo!!! Did you get the Chony? Made in Mississigua Ont? I have one of those and love it.
I cannot tell about the gauss meter. TI could be anything. Sorry. The Chony on the other hand is fantastic.
I got the competition electronics prochrono digital, came from the states. I have to compile a video but I did use it and get some numbers on my air canon.
Your gauss is a good as mine.
The people at Chrony are so nice. I had an “incident” with one. I was testing the velocity of a “high speed metallic projectile” and the test device device targeting was off. The projectile when right through the display and into the device. When I called their customer service I sheepishly told her the situation and asked if I was the millionth person to do that. She said “That is just for today! It happens all the time!” They upgraded to another unit at a nominal cost that has a remote display and an armored front.
You can calculate the velocity of your potato cannon by timing the flight time and using Physics. We discussed this in another thread.. I will guess 150 to 170 ft/sec.
@Pachyderm_In_The_Room ‘s answer is perfect. It’s absolutely correct.
@LuckyGuy yup, at 60 psi I got around 230 fps, and with a 16g projectile that’s around 28 foot pounds of force (I have nothing to get a sense of how powerfull that is)
@XOIIO Foot-pounds is energy, not force, and I hope you’re not mixing metric and SAE measurements in your calculations!
I don’t recommend you buy the item in your link, because I find the ad suspicious. Particularly I’m put off by the lack of technical information- there’s no mention I can see of what units it measures (gauss? microtesla?) or how high it can go.
If you have an Android device it is pretty likely to have a magnetometer on the SoC. Usually it’s used as a compass. There are a couple of apps you can install to use it to detect magnetic fields. In particular there’s one called “Tricorder” that does the job.
@XOIIO Well, for the price of that “ghost detector” on eBay I reckon you could get an Arduino and one of those $4 magnetometer boards and hook them up together… It depends on how much your time is worth, I guess, and how valuable it is to you to know the precision of the instrument.
Here are some energy numbers for you in foot-pounds.
Daisy BB gun, 0.79
Benjamin 1000 pellet rifle, 12.0
CCI Segmented Subsonic .22, 97.8
CCI Velocitor .22 182.7 (Amazing for a .22 )
Federal 380 Hydra-shok, 199.6
12 ga Winchester 3” magnum 1 oz, 3006.2 Tremendous power, you will not do it many times per day!)
@rexacoracofalipitorius Yeah, I was thinking that the arduino way would be better, but I don’t have a good way to calibrate the,
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