Ron Adventure is just bad planning." -- Roald Amundsen
However I do beleive the criticism is uncalled for.
Stick around and you will eventually get an educated answer ;o)
Lonnie
The often quoted lifting force is meaningless unless you want to rescue a lost boat anchor.
Your only method is to use the makers data, knowing the grade of neo and the physical dimensions.
Try http://www.magnetweb.com/ Flux[ Parent ]
try googling for a 'gauss meter'
you can find homebrew circuits on the web to make your own from old pc parts, the important bit is called a hall effect sensor, here is a discussion you may find interesting
paul
This makes it virtually useless with neos in any form of closed magnetic circuit.
Unless you can measure up to about 1T (10,000g) it is of little use.
I use an integrator coupled to a search coil. It measures total flux enclosed within the coil area just in the same way as a Grassot fluxmeter. If you want flux density you divide by the area of the coil.
Just use a low drift op amp with very precise zeroing. You still need to calibrate the thing for defined measurement but it would be a good comparator even if not calibrated. Flux[ Parent ]
Let's see:
Supply voltage 5.0V; sensitivity 1.3mV/G (0-900G; I'll extrapolate, for simplicity) 5000mV/1.3mV/G = 3850 Gauss (total range)
In reality, 1925 Gauss North and -1925 Gauss (South). BTW, 10.000 G = 1T
Not exactly 'unlimited' in my book. Unless I'm overlooking something.
What also struck me: there's NO graph in the datasheet that gives output voltage as a function of magnetic field strenght... Strange, for a device that is supposed to measure exactly that.[ Parent ]
It is designed as a switch for electronic controlled motors etc. You can use it for measurement at low flux density but it is not as convenient as the Honeywell Lohet things which are calibrated. Flux[ Parent ]
