The Mag-01H instrument may be powered by either mains voltage or internal battery, and have a 4½ digit display and an analog output. The internal rechargeable sealed lead acid battery provides up to 16 hours continuous use and may be recharged using the mains adaptor provided.

The Mag-01H has an additional x10 sensitivity switch for a resolution of 0.1nT and an offset control for up to ±90µT in 10µT steps.

This instrument feature superb linearity, accuracy, and very low drift with time and temperature. Calibration is traceable to international standards, and a re-calibration service is available.

Probes for the Mag-01H

The sensing axis of the Mag-B and Mag-D probes is along the axis of the cylindrical enlosure (axial) and the sensing axis of the Mag-C and Mag-E probes is along the axis of the short cylinder mounted at the end of the probe (transverse). The magnetic detection axis and center of sensitive volume are marked on each probe.

The cryogenic Mag-F and Mag-G probes are suitable for operation at temperatures down to liquid helium and have 1 meter of 4 x .02mm enameled copper wire connected to the sensing element for use in a cryostat or vacuum chamber. This length can be extended to a maximum of 5 meters if required. Cable assemblies with Customer specified vacuum feed-through connector and cable are available to special order.

The primary purpose of the instrument is to measure the magnetic declination and inclination of a magnetic field (typically the Earth’s magnetic field) with a high degree of precision. Commonly used in magnetic observatories around the world, the system can also be used to perform compass pad calibration or be used in the cross calibration of other magnetometers typically mounted in range finders.

Mag-13 Fluxgate Sensors can be used for most applications where high precision magnetic field measurements are required.

The gradiometer’s main application is for the use or land survey for archaeological features. The highly sensitive gradiometers will detect sub-nT field variations over the spacing between the two sensing elements. These anomalies may be linked to soils of differing magnetic susceptibilities or the presence of high susceptibility material (kilns).

Additionally, to expand the survey coverage, the gradiometers can be installed on a cart system that could carry multiple gradiometers at different spacing options. This facilitate ground cover without burdening the operator.

The range of high temperature fluxgate probes includes sensing elements for operation to 175° C or 215° C. Typically used in directional drilling (measurement while drilling – MWD), these units can be provided with drive electronics design information for ease of integration in the customer’s directional sensor.

The gradiometer has application in a multitude of application from signature measurement to localisation of ferromagnetic material underground, whether this is pipes or unexploded ordnances (UXO).

A power supply/multiplexing box can be provided powering 2 sensors and allowing USB output of the data.

Fields from nT to 20 T, DC to 1kHz, can be measured with ±1% accuracy. All three axes of the magnetic field are simultaneously measured to give an accurate total field amplitude independent of Probe orientation. The entire instrument has been reduced to a cable that can plug directly into the USB port on your PC or battery-powered handheld computer.

A SENIS Hall magnetic field transducer consists of two modules:

• Module H, consisting of the Hall probe and the CaH cable
• Module E, containing the analog electronics for signal conditioning

To build up a complete measurement system, the module E needs to be connected to an adequate power supply and to a voltmeter (or A/D converter) for each measured component of a magnetic field.

The DTM-133 digital Hall teslameters (gaussmeters) provide superior accuracy, resolution, and long term measurement stability. They outperform other commercially available Hall effect based instruments for precision applications of field mapping, magnet field control, magnetic sensor calibration, and permanent magnet quality control.

All Group3 Hall probes are pre-calibrated against an NMR (Nuclear Magnetic Resonance) Teslameter (Gaussmeter) over their operating field and temperature range. The unique characteristics of each probe are stored in an EPROM located in the probe connector. This enables the probes to be interchanged without recalibration.

These teslameters (gaussmeters) are particularly suitable for permanent installation in particle accelerators or test and measurement equipment. They are mechanically compact, and up to three units may be installed in a single 2U EIA 19″ rack panel. Their high brightness LED displays can be viewed from any angle, in low ambient light, and from several meters distance. Special attention has been paid to circuit and software design to ensure completely reliable operation in electrically noisy environments.

The two available interfacing options are IEEE-488 or RS-232C. The serial interface includes a fiber optic port to enable operation of the DTM at a high voltage with respect to the host computer.

The Group3 DTM digital Hall teslameters (gaussmeters) provide superior accuracy, resolution, and long term measurement stability. They out perform other available Hall effect based instruments for precision applications of field mapping, magnet field control, magnetic sensor calibration, and permanent magnet quality control.

All Group3 Hall probes are pre-calibrated against an NMR (Nuclear Magnetic Resonance) Teslameter (Gaussmeter) over their operating field and temperature range. The unique characteristics of each probe are stored in an EPROM located in the probe connector. This enables the probes to be interchanged without recalibration.

These teslameters (gaussmeters) are particularly suitable for permanent installation in particle accelerators or test and measurement equipment. They are mechanically compact, and up to three units may be installed in a single 2U EIA 19″ rack panel. Their high brightness LED displays can be viewed from any angle, in low ambient light, and from several meters distance. Special attention has been paid to circuit and software design to ensure completely reliable operation in electrically noisy environments.

The two available interfacing options are IEEE-488 or RS-232C. The serial interface includes a fiber optic port to enable operation of the DTM at a high voltage with respect to the host computer.

The new DTM-333 has 2 main operating modes – Axis (3D Mode and Channel Mode. In Axial mode the 3D probe is used (3DT-130 or 3DT-230). This means the Teslameter operates exclusively as a combined 3 axis instrument. When a mode is changed ie. range is set to 1 then all axis follow similarly when zeroing. In channel mode each channel is able to be operated independently of the other allowing the user the flexibility of 3 separate channels for 3 separate tasks including being able to use different specification probes. This means the DTM‐333 is a very flexible instrument.

The temperature measurement feature allows user to obtain current temperature values while monitoring the magnetic field.

The transducer consists of two modules:
1. Interchangeable Hall probe with various cable length (Module H), and
2. Electronics (Module E).

The Low-Noise Digital Teslameter is a high accuracy, temperature very stabilized device for the precise measurement of magnetic field.
Each Teslameter is calibrated with the individual correction data for the connected probe, so the Hall probe is interchangeable, by keeping the same accuracy of 100ppm.

PT2025 is now End-of-Life (EOL)

This page remains as probes are still available, and for technical support. For all new systems, see: Metrolab PT2026 Teslameter