AlphaLab, Inc. DC Gaussmeter Model 1

The meter has been optimized for easy use. It begins reading 1/2 second after it is turned on and updates four times a second. Stability is excellent, with noise level of only 0.1 gauss. Reproducibility at constant temperature is better than one part in 5000, and is generally only limited by the user's ability to position the sensor on the same part of the magnet as was originally measured (field strength varies across the face of most magnets). Full response time to a rapid field change is only 1/4 second. No setup is needed, and there is only one range (display reads from 0.0 to 19,999.9 gauss, with negative sign if polarity is negative). Therefore, artifacts due to autoranging do not occur. These features make the Model 1 faster to use than any other digital gaussmeter, while still very easy to use. The only control is the "OFFSET", which allows subtraction of ambient field up to +/- 10 gauss. (Turn this knob to the center position if not needed).