Using the DVM is fine but those hall sensors are pricey and basically raw in that there is no built in amplifier. The output level will be rather low. The HGA 2010 puts out about 20mV/kG, and requires a precision current source. If you are on a budget, I would go with something like these: http://www.allegromicro.com/en/Products/Categories/Sensors/linear.asp Just a couple of bucks vs. $120 These are about 1000X more sensitive because of the built in amplifier, typically 2-5 mV/G (vs kG), plus they can be excited with a very simple DC supply, no precision required. Bottom of the page you will find a pdf app note for linear hall sensors. Also try Micronas linear hall effect sensors $1 to $2 range If any of these are too sensitive for your application, you can provide a front to back magnetic shield / shunt.
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Topic: Gaussmeter (Read 10956 times)
