GAUSSMAX GM-200A

Frequently Asked Questions

Compared to other gaussmeters on the market, yours is relatively inexpensive. What did you leave out?
First, we left out all of the extraneous controls and adjustments that more expensive laboratory instruments have. Instead, we let a small computer in the GM-200A do the work for you. Second, we chose range and accuracy specifications to meet most of our customers needs leaving out costly frills. If you need less than 1 Gauss accuracy, you should be looking for a different device (see links for other manufacturers). Third, we designed the GM-200A for ease of manufacture to keep assembly costs as low as possible.
Why does it have only one control?
It needs only one control. The GM-200A was designed for ease of use by anybody, not just scientists. Careful ergonomic design allowed us to integrate everything needed into a single push button (patent pending).
Can the GM-200A measure AC fields?
No. The GM-200A measures constant or slowly varying fields up to approximately 2 hz. If you are interested in evaluating electromagnets that are driven with AC current then you need a different gaussmeter.
How robust is it?
Very. The case is made of flame retardant ABS with co-molded rubber grips. The display and button are protected with a thick water-resistant polyester overlay. All parts are integral with a single pc board except the display and sensor which are shock mounted and connected with flex circuits.
Why is the gauss I measure on the GM-200A different than that advertised by my magnet supplier?
Most manufacturers advertise what is called the "remnant" field of a magnet. This is the field strength you will get from your magnet only under very special conditions. For cylindrical shaped magnets by themselves (no nearby iron or steel), you should expect to see approximately 1/2 of the rated (remnant) value at the magnet face. As you move away from the magnet, the gauss value drops off rapidly.
Can I measure permanent magnets rated greater than 10,000 gauss with the GM-200A ?
Yes. As noted in the previous question, a magnet's external field is almost always less than its "rating" or remant field . Most permanent magnets or combinations of permanent magnets have external fields less than 10,000 gauss. Call us is you have a question about your particular magnet configuration.

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