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GEM
OVERHAUSER PRODUCTS
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Overhauser
magnetometers use electron-proton coupling to produce
an order-of-magnitude stronger precession signals
than conventional proton precession units. This results
in improved signal-to-noise ratio and low weight -
making it ideal for users who want high value without
incurring the high expense of cesium systems.
GEM's
GSM-19 -- the only commercial Overhauser system -
delivers a sensitivity of 0.015 nT combined with robustness
and low power consumption. It
features a built-in GPS option for positioning accuracy
and reduced grid surveying costs. VLF
is also available.
In
standard mode, the GSM-19 cycles up to 3 seconds ("slow"
cycling). In "Walking" and "Fast"
modes, the system cycles up to 0.5 seconds and 0.2
seconds, respectively. "Walking" and "Fast"
modes are defined as "fast" cycling.
"Walking"
mode enables the operator to press a key at designated
reading stations. Intervening values are linearly
interpolated for densely-sampled results. "Fast"
mode includes this functionality as well as a higher
cycling rate.
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| v6.0
Overhauser Magnetometer / Gradiometer / VLF - Standard Mode
(Slow Cycling) |
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Standard
(3 second)
Magnetometer
(GSM-19)
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- GSM-19
Console
- GSM-19
Single Overhauser Sensor with Connector Cables
- 4
Mb Memory
- RS-232
Download Cable
- Expandable
Staff
- More
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Standard
(3 second)
Magnetometer / VLF
(GSM-19V)
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See
large picture above.
Note that the GSM-19V
has only one Overhauser sensor.
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- GSM-19
Console
- GSM-19
Single Overhauser Sensor with Connector Cables
- Omni-directional
VLF Sensor with Connector Cables
- 4
Mb Memory
- RS-232
Download Cable
- Expandable
Staff
- More
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Standard
(3 second)
Gradiometer
(GSM-19G)
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- GSM-19
Console
- GSM-19
Dual Overhauser Sensors with Connector Cables
- 4
Mb Memory
- RS-232
Download Cable
- Expandable
Staff
- More
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Standard
(3 second)
Gradiometer / VLF
(GSM-19GV)
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See
large picture above.
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- GSM-19
Console
- GSM-19
Dual Overhauser Sensors with Connector Cables
- Omni-directional
VLF Sensor with Connector Cables
- 4
Mb Memory
- RS-232
Download Cable
- Expandable
Staff
- More
...
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| v6.0
Overhauser Magnetometer / Gradiometer / VLF - Walking Mode (Fast
Cycling) |
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Overhauser
Walking
(0.5 second) Magnetometer
(GSM-19W)
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Overhauser
Walking
(0.5 second) Magnetometer
/ VLF
(GSM-19WV)
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See
GSM-19 picture above.
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Overhauser
Walking
(0.5 second) Gradiometer
(GSM-19G)
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See
large picture above.
Note that the GSM-19G does not
have a VLF sensor.
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Overhauser
Walking
(0.5 second) Gradiometer / VLF
(GSM-19GV)
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See
large picture above.
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| v6.0
Overhauser Magnetometer / Gradiometer - Fast Mode (Fast Cycling) |
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Overhauser
Fast
(0.2 second) Magnetometer
(GSM-19F)
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See
GSM-19 picture above.
Note that the GSM-19F
has only one Overhauser sensor.
VLF is an option with this system.
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Overhauser
Fast
(0.2 second) Gradiometer
(GSM-19FG)
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See
large picture above.
VLF is an option with this system.
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Overhauser
Fast
(0.2 second) Magnetometer with Continuous Proton Oscillator
(GSM-19FC)
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See
GSM-19 picture above.
Note that this system
has only one Overhauser sensor.
VLF is an option with this system.
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Overhauser
Fast
(0.2
second) Gradiometer with Continuous Proton Oscillator
(GSM-19GFC)
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See
large picture above.
VLF is an option with this system.
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