GAUSSMETERS

Gaussmeter
* INTRODUCTION
* PRODUCT RANGE
* CALIBRATION STANDARD
* HALL EFFECT PRINCIPLE
* GAUSSMETER SELECTION FACTORS
* HALL PROBES

Hall Effect Principle

Consider a small slab of semi-conductor material (Hall Element).  An electrical current is passed from one end of the slab to the other and the voltage at each edge of the slab is the same when no magnetic field is present.

If a magnetic field is now applied through the top to bottom surfaces of the slab, a voltage appears across the sides of the slab, which is directly proportional to the Magnetic Flux Density (a linear result should be achieved).

In reality, all practical Hall Probe elements are only linear within certain limits, normally 1%-2%, so the approach to this problem is to select an appropriate current and Hall Probe load resistance to minimise these non-linearity errors.

Hirst performs an actual calibration of the individual Hall element so all the errors are known and recorded.

The difference between a theoretically perfect Hall Probe and that of an individual Hall Probe is measured and the difference recorded in an EEPROM located in the Hall probe socket (this memory device also contains other information such as serial number and calibration date).   This information is used by the Gaussmeter to correct the measured readings for non-linearity of the Hall element.

This technique gives superb results and enables calibration of the Gaussmeter to be carried out in software.

This calibration technique ensures that each Hall Probe is fully interchangeable with any Hirst Gaussmeter.



Next > Gaussmeter Selection Factors
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GAUSSMETER COMPARISION TABLE

Click here to view  the gausmeter product range comparison table.
The comparision table highlights the various features of each Gaussmeter
Click here to view  the gausmeter product range comparison table.

GAUSSMETER PRODUCT RANGE

Click for GM08 Gaussmeter Information

GM08 Gaussmeters

Supports the extra functions of a non-volatile memory to hold stored measurements that can be uploaded through an RS232 or USB interface to a host computer.Click to view product information on the GM08 Gaussmeter
Click for GM07 Gaussmeter Information

GM07 Gaussmeters

The GM07 Gaussmeters are hand held devises, easily transported to various locations in a factory environment. Click to view product information on the GM07 Gaussmeter
 

Group3 Digital Teslameter

Hirst Magnetic Instruments are the UK sole distributor of Group3ís Digital TeslameterClick to view product information on Group3’s Digital Teslameter

GAUSSMETER QUOTATION

For an on-line gaussmeter quotation or for more information please visit our gaussmeter web site www.gaussmeter.co.uk

Click here for an on line gaussmeter quotation

SELECTING THE RIGHT GAUSSMETER

There are many key factors you need to consider when selecting a Hirst Gaussmeter i.e. accuracy, ranges and limits, External interfaces...

Hirst have gathered the following factors to aid you in your selection

Click to view the selections factors you need to consider when selecting a Hirst Gaussmeter