All MG-25 Magnetic Field Indicators can be certified in accordance with ASTM E1444. Calibration includes readings taken at three points in each range and each polarity including zero.
Calibration/certification may be ordered when the instrument is purchased, or the instrument may be returned for recalibration/certification.
Range 20-0-20 Gauss
Range 5-0-5 Gauss
Range 10-0-10 Gauss
Range 50-0-50 Gauss