DC Gaussmeter Model GM1-ST


The Gaussmeter Model GM1-ST measures the field of even the strongest magnet (to 20kG) down to fine resolution (0.1G). Features rapid turn-on and fast update.

Product Documentation


SKU: GM1ST Category:


Product Description:
The DC Gaussmeter Model GM1-ST is measures strength and polarity of magnetic fields up to 19,999.9 gauss. The sensor can easily fit in a .060 inch (1.5 mm) gap and is at the end of a 100 cm flexible cable. The sensor end can be bent if required for a variety of situations. Place the sensor on a magnet face to measure the field. With a resolution of 0.1 gauss, it can measure any tiny variation from magnet to magnet or it can detect if a given magnet has lost even a little strength. Bend the sensor in to a “L” to measure inside a DC solenoid tube. The 5 ½ digit display requires neither auto nor manual range change, making it easier to use than older style 3 ½ or 4 ½ digit meters. Turn on the meter and immediately begin reading fields (updates 4 times per second). There is no setup required, making this the fastest, easiest gaussmeter available.

Comes with NIST traceable calibration certificate. Yearly calibration service available from AlphaLab Inc.


  • Portable for easy measurements in factories or other industrial environments
  • High dynamic range 5 ½ digit display reads even the strongest magnets with 0.1 gauss resolution, including polarity
  • Turns on instantly, updates four times a second, no setup or initial calibration required
  • Auto-Zero (subtracts the present field from subsequent readings); also a fine offset control
  • Offset range is the full ±19,999.99 gauss
  • 1% accuracy at room temperature, including probe
  • Certificate of NIST traceability included
  • Probe and Battery Included
  • CE Compliant
  • Detachable Rubber Boot Included


  • Measures all permanent magnets. (Maximum field of magnets is about 15,000, which occurs only with rare-earth magnets in a gap configuration.)
  • High resolution of 0.1 gauss over the entire range of +19,999.9 to -19,999.9 gauss allows detection of any variation in field from a magnet.
  • Measures inside DC Solenoids (probe is bent into “L” shape to measure this).
  • Sufficient resolution to map fields far from magnets.
SPECIFICATIONS: 1-axis DC Gaussmeter GM1-ST
Resolution: ±19,999.9 G with polarity indicator
Resolution: 0.1 G
Accuracy: ±1% of reading (16° to 29°C); ±2% (-4° to 65°C)
Offset: Auto-Zero. Also fine offset (0.1 gauss resolution)
Probe (non-detachable): 1.5 (thick) x 4.3 x 24 mm
Meter Size: 5.2 x 3.6 x 1.6 inches; 132 x 91 x 41 mm
Weight: 8 oz
Battery: 9 volt alkaline (~ 40 hour life) / “Low Battery” indicator

Additional information

number of axes

single axis

field type

DC Magnetic


0.1 G


NIST traceable




Manufacturing, Aerospace

max range

±19999.9 G