Magnetic Field Measurement - GMW Associates (2025)

GMW offers 1-axis, 3-axis and total field measurement instrumentation for magnetic field measurement. For Magnetic Field Mapping, see:
Magnetic Field Mapping

  • Low Field Fluxgate Magnetometers – 1-axis and 3-axis Fluxgate Magnetomers and Gradiometers for fields ±0.1nT to ±2000µT
  • Digital Teslameters / Gaussmeters – Hall effect – 1-axis and 3-axis Digital Teslameters for fields ±6mT to ±20T
  • Digital Teslameters / Gaussmeters – NMR – Total Field NMR Probes and Arrays for fields from 38mT to 30T with <10 ppb precision at 3T.
  • Analog Magnetic Field Transducers – Analog Hall effect magnetic field probes, 1-axis and 3-axis, voltage output. Fields ±20mT to ±20T and frequency response to 200kHz.
  • Other Magnetic Field Measurement – Including Metrolab FDI high speed voltage integrator and Senis low-noise NanoVolt amplifier.

Low Field Fluxgate Magnetometers

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Bartington Fluxgate Magnetometer, 1-axis This standalone single axis fluxgate magnetometer is a portable, high-performance instrument. It provides measurement and display of the intensity of static and slowly varying magnetic fields in the direction of the probe.Range from 0.1nT to 2mTAxial and Transverse ProbesCryogenic ProbesHigh-vacuum Probes
Bartington Mag-01H D/I System The Mag-01H D/I system consists of a precision single-axis fluxgate magnetometer mounted on top of a non-magnetic theodolite.Excellent angular precision to at least 6 seconds of arcLow noise and offsetsNon-magnetic Wild T1 theodolite
Bartington Fluxgate Magnetometer, 3-Axis, Low Noise Bartington 3-Axis Fluxgate Sensors are compact, high performance fluxgate sensors with integral electronics that provide precision measurements of static and alternating magnetic fields in three axes.Range: ±70, ±100, ±250, ±500, or ±1,000µTOutput: ±10V Full ScaleBandwidth: DC to 3kHzNoise: <6pT/√Hz at 1Hz
Bartington Cryogenic Magnetometers, CryoMag Bartington Cryogenic Magnetometers for Supercomputer Applications, CryoMagOperating temperature down to 2KNoise level down to <20pTrms/√Hz at 1HzFrequency response from DC to 1kHzMeasuring ranges of ±70, ±100, ±250 and ±500µT
Bartington Fluxgate Sensors, 3-axis, Miniature and Low Power Bartington Fluxgate Magnetomers with lower power, smaller size, wide bandwidth or lower cost for applications such as probe arrays.Low Power: Mag648/648Miniature Size: Mag612Wide Bandwidth: Mag639Lower Cost: Mag690
Bartington Fluxgate Magnetometer, 3-axis, High Temp High temperature fluxgate probes for operation to 175° C or 215° C.Directional drilling.Measurement while drilling (MWD).Borehole tool attitude monitoring.
Bartington Fluxgate Magnetometer, 3-axis, Aerospace/Space Spacemag-Lite is a compact three-axis fluxgate magnetometer for spaceflight applications. Built from commercial off the shelf components to control cost in CubeSat applications.Conforms with ‘Pumpkin’ CubeSat PCB specificationsVacuum compatibleNoise: ≤ 20pTrms/√Hz at 1HzProbe-only and PCB schematics version available
Bartington Fluxgate Gradiometer, Grad601 The Grad601 is a land use single-axis gradiometer with a 1m separation between the two fluxgate sensors.1m separation1 or 2 gradiometer sensorsTurnkey system incl. battery, logger and carry caseCart based system available
Bartington Fluxgate Gradiometer, 3-axis, Digital Grad-13 provides high resolution vector measurements of the strength and direction of magnetic fields on land or in water.Baselines from 500mm to 1000mmLand and submersible (200m) versionsMeasuring range of ±70 or ±100μTIntegral three-axis accelerometer with ±2g range

Digital Teslameters / Gaussmeters - Hall effect

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Senis 3MH1 Handheld Teslameter The 3MH1 is an easy-to-use handheld Teslameter which allows users to measure all 3 components of the magnetic field.3-axis Hall probeField ranges of 60mT, 400mT, 4TB accuracy +/-20uT at 0.5mT (5G)
Senis 3MH2 Digital Transducer The 3MH2 is a High-Quality 3-D Digital Transducer3-axis Hall probeHigh measurement DC accuracy: < 0.1% (1’000ppm)Very high magnetic DC resolution: better than 1ppm @ ±2T rangeHigh temperature stability: < 100ppm/°C
Senis 3MH4 Digital Teslameter The 3MH4 is a Digital 3D Teslameter that redefines magnetic field measurement with unmatched precision, stability, and adaptability.3-axis Hall probeHigh measurement DC accuracy: < 0.1% (1’000ppm)Very high magnetic DC resolution: better than 1ppm @ ±2T rangeHigh temperature stability: < 100ppm/°C
Metrolab THM1176/TFM1186 USB Teslameter The Metrolab THM1176 and TFM1186 are unique three-axis Magnetic Field Probes with USB Interface and power via the interface.TFM1186: 100uT rangeTHM1176-LF: 8mT rangeTHM1176-MF: ±0.1, 0.3, 1, 3T range (manual or auto-select)THM1176-HF: ±0.1, 0.3, 1, 3T, 20T range (manual or auto-select)
Private: Group3 Digital Teslameter, 1-axis, DTM-133 The Group3 DTM-133 is a high performance Hall effect teslameter (gaussmeter) with digital linearity correction to provide 0.03% accuracy, resolution to 100ppm, and a temperature stability of 100ppm/°C.The DTM-133 digital Hall teslameters (gaussmeters) provide superior accuracy, resolution, and long term measurement stability.
Private: Group3 Digital Teslameter, 1-axis, DTM-151 The Group3 DTM-151 is the highest performance Hall effect teslameter (gaussmeter) commercially available with digital linearity and temperature correction to provide 0.01% accuracy.The Group3 DTM digital Hall teslameters (gaussmeters) provide superior accuracy, resolution, and long term measurement stability.

Digital Teslameters / Gaussmeters - NMR

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Metrolab Digital NMR Teslameter, PT2026 The Metrolab PT2026 Teslameter (Gaussmeter) utilized the nuclear magnetic resonance (NMR) of protons or deuterons in a magnetic field.Extended range of 38 mT – 30 TUltra-high precision: < 10 ppb at 3 TIntegrated 3-axis Hall sensorVersatile software interface
Metrolab Digital NMR Teslameter, PT2025 The Metrolab PT2025 Teslameter (Gaussmeter) utilizes the nuclear magnetic resonance (NMR) of protons or deuterons in a magnetic field. It achieves 5ppm absolute accuracy and 0.1µT (1mG) resolution for measurement or mapping of uniform magnetic fields in the range 0.043T (430G) to 13.7T (137kG).PT2025 has been replaced by PT2026. See PT2026 for all new systems.
Metrolab Magnetic Field Camera, MFC2046 TheMetrolab MFC2046 Magnetic Field Camerautilizes a proton NMR sensor Array to simultaneously measure up to 32 field points with better than 5ppm absolute accuracy and 0.1ppm relative accuracy in 0.5 to 2 seconds. The very high resolution and stability of the MFC also enable measurement of magnet stability and noise effects.
Metrolab Magnetic Field Camera, MFC3045 The Metrolab MFC3045 Magnetic Field Camera, utilizes a proton NMR sensor Array to simultaneously measure up to 32 field points with better than 5ppm absolute accuracy and 0.1ppm relative accuracy in 0.5 to 2 seconds. Leading MRI Magnet and System manufactures have adopted the MFC3045 to provide a ten times improvement in mapping resolution and a ten times reduction in aqusition period.

Analog Magnetic Field Transducers

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Senis Magnetic Field Transducer, 1-Axis Senis Magnetic Field Transducer, 1-axisI1A Integrated Hall probe for very low noise measurementsF1A Fully-Integrated Hall probe for very high spatial resolutionRange: ±20mT … ±20TBandwidth: 2.5kHz
Senis Magnetic Field Transducer, 3-Axis Senis Magnetic Field Transducer, 3-axisF3A Fully-Integrated Hall probe for very high spatial resolutionRange: ±20mT … ±20TBandwidth: 25kHz
Senis Magnetic Field Transducer, Cryogenic, 3-Axis, K3A Senis Magnetic Field Transducer, Cryogenic, 3-axisMeasures 3D (Bx, By, Bz) magnetic fields at cryogenic temperatures to 1 KMeasurement Ranges: ±2T, ±5T or ±9TSensitive volume of less than 0.6 mm3Bandwidth: DC to 1kHzOptional calibrations to 0.25 % accuracy and high fields ±9 T
Senis Magnetic Field Transducers, Three-Axis, AC Senis Magnetic Field Transducer, 3-axis, ACMagnetic Field Measurement Range: ±10mTMagnetic Field Resolution <1.5μTrmsFrequency range from 10kHz to 200kHzPhase Accuracy: <3° at 85kHz

Other Magnetic Field Measurement

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Metrolab Fast Digital Integrator, FDI2056 The Metrolab FDI2056 Fast Digital Integrator is a high precision, high speed voltage integrator. Combined with an appropriate flux coil, it makes an extroidinarily fast, flexible and sensitive magnetometer.Flexible: Wide range of inputs, to ±20V maxFast: 500 kS/sPrecise: 18 bit resolutionReal-Time Data Acquisition
Magnetic Field Measurement - GMW Associates (2025)
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