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Core Capabilities
- Flexibility with Value
GEM's product
families are carefully designed to offer you a range of non-overlapping
capabilities so that you can select the ideal system for your application,
sensitivity needs, budget, upgrade pathway, etc.
The following
table shows a summary of Core Capabilities for the QuickTracker™
, Overhauser, SuperSenser™ and SuperGrad™ technologies.
(To see how each of these technologies relates to your survey needs,
you may want to have a quick look at the Application
Configurator).
|
Core capabilities
are organized in terms of the criteria that deliver our customers
the most flexibility and value, namely:
- Performance
- Operating
Mode
- Data and
Input / Output
- Mechanical
/ Power
- Maintenance
and Support
- Environmental
- Shipped Component
After comparing
the capabilities for each system, you may also want to refer to
our information on Options, which includes:
- Building
Blocks
- Sensor Options
- GPS Options
- GPS Navigation
Options
- Software
Solutions
To review information
on options, click here.
|
|
GEM
Core Capabilities
| Product
Family |
QuickTracker
|
Overhauser
|
SuperSenser
|
SuperGrad
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Reading
Mode |
Slow
|
Walk
(includes Slow sampling)
|
Super
Fast (includes Fast and partial Walk sampling)
|
Super
Fast (includes Fast sampling)
|
| Performance |
| Sensitivity
(nT) |
<0.1
|
15 pT /
ÖHz
at 1 sample / sec
|
4.7 pT / ÖHz
at 20
samples / sec
|
0.00003
|
| Absolute
accuracy over temperature range (plus / minus nT) |
1
|
0.1
|
0.1
|
0.1
|
| Dynamic
range (nT) |
10,000
to 120,000
|
10,000
to 120,000
|
10,000
to 120,000
|
10,000
to 100,000
|
| Gradient
tolerance (nT / m) |
>
7,000
|
>
10,000
|
5,000
|
2000
|
| Counter
resolution (nT) |
0.01
|
0.01
|
0.0001
|
0.000001
|
| Cycle
time (seconds) |
60
to 3
|
60,
3, 2, 1, 0.5, 0.2
|
1,
0.5, 0.25, 0.2, 0.1, 0.05
|
1,
0.5, 0.25, 0.2, 0.1, 0.05
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Operating
Mode |
| Programmable
base station |
Yes
|
Yes
|
Yes
|
No
|
| Stationary
(time, date and reading storage) |
60
to 3 seconds
|
60
to 0.2 seconds
|
1
to 0.05 seconds
|
1
to 0.05 seconds
|
| Mobile
(coordinates, time, date and reading stored automatically) |
3
sec minimum
|
60
to 0.2 seconds
|
No
|
1
to 0.05 seconds
|
| Walking
(time, date and reading stored automatically. Coordinates
assigned at picket) |
0.5,
1 or 2 seconds
|
0.5,
1 or 2 seconds
|
1
to 0.05 seconds
|
No
|
| Remote
control (optional) |
RS-232
|
RS-232
|
RS-232
|
RS-232
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Data
and Input / Output |
| Standard
Memory (4 Mbytes) |
Yes
|
Yes
|
Yes
|
Dumps
direct to computer
|
| Readings
(base station) |
699,050
|
699,050
|
699,050
|
Continuous
reading
|
| Readings
(mobile) |
209,715
|
209,715
|
209,715
|
Continuous
reading
|
| Readings
(gradiometer) |
174,762
|
174,762
|
174,762
|
Continuous
reading
|
| Readings
(walking mag) |
299,593
|
299,593
|
299,593
|
Continuous
reading
|
| Data
transfer (115 Kbytes) |
Yes
|
Yes
|
Yes
|
Yes
|
| Analog
output (optional) |
Yes
|
Yes
|
Yes
|
Yes
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Maintenance
and Support |
| Expandable
memory (4 Mbyte increments) |
32
Mbytes
|
32
Mbytes
|
32
Mbytes
|
32
Mbytes
|
| Internet
firmware upgrades |
Yes
|
Yes
|
Yes
|
Yes
|
| Upgradeable
to higher version or product family |
Yes
|
Yes
|
No
|
No
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Mechanical
/ Power |
| Batteries |
1
internal
|
1
internal
|
1
internal and 2 external
|
N/A
|
| Battery
belt |
176
x 78 x 125
|
176
x 78 x 125
|
267
x 178 x 76 cm
|
N/A
|
| Battery
weight |
0.6
kg
|
0.6
kg
|
3.9
kg
|
N/A
|
| Console
dimensions |
223
x 69 x 240 mm
|
223
x 69 x 240 mm
|
223
x 69 x 240 mm
|
483
x 89 x 406 mm
|
| Console
weight |
2.1
kg
|
2.1
kg
|
2.1
kg
|
6.6
kg
|
| Sensor
head dimensions |
75
mm dia. X 140 mm length
|
75
mm dia. X 175 mm length
|
89
mm dia. and 152 mm length
|
26.3
cm dia. x 23 cm length
|
| Sensor
head weight |
2.0
kg
|
1.0
kg
|
1.37
kg
|
6.0
kg
|
| Sensor
angle |
N/A
|
N/A
|
30
degrees between sensor head axis and magnetic field vector
|
45
degrees plus / minus 35 degrees off magnetic field direction
|
| Electronics
dimensions |
N/A
|
N/A
|
306
x 85 x 750 mm
|
100
x 50 x 50 mm
|
| Electronics
weight |
N/A
|
N/A
|
1.6
kg
|
1.0
kg
|
| System
warm-up time |
N/A
|
N/A
|
15
minutes @ 20 degrees C
|
2
hours @ 20 degrees C
|
| Power
supply |
12
V DC
|
12
V DC
|
22
to 32 V DC
|
22
to 32 V DC
|
| Power
start-up |
N/A
|
N/A
|
25W
dropping to 8 W
|
|
| Power
consumption |
12
watt-seconds per reading
|
2
watt-seconds per reading
|
8
watt @ 20 degrees C
|
12
W avg., 40 W max.
|
| Console
power requirements |
12
V 2.2 Ah battery
|
12
V 2.2 Ah battery
|
12 V 2.2 Ah plus 24 V 7.2 Ah batteries
|
28
V 6 A DC power supply
|
| Staff
assembly |
2240
mm length
|
2240
mm length
|
760
mm length
|
N/A
|
| Staff
weight |
1.0
kg
|
1.0
kg
|
1.2
kg
|
N/A
|
| VLF
sensor |
160
x 150 x 150 mm
|
160
x 150 x 150 mm
|
N/A
|
N/A
|
| VLF
sensor weight |
1.3
kg
|
1.3
kg
|
N/A
|
N/A
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Environmental |
| Operating
temperature |
minus
40 to 55 degrees C
|
minus
40 to 55 degrees C
|
minus
40 to 55 degrees C
|
minus
20 to 50 degrees C
|
| Humidity |
0
to 100% splashproof components
|
0
to 100% splashproof components
|
0
to 100% splashproof components
|
1
to 100% splashproof sensors; console requires protected
mounting
|
| Temperature
storage |
minus
70 to 55 degrees C
|
minus
70 to 55 degrees C
|
minus
70 to 55 degrees C
|
minus
70 to 55 degrees C
|
| Model |
GSM-19T
|
GSM-19W
|
GSMP-30
|
GSMP-20
|
| Shipped
Components |
| Batteries |
Yes
|
Yes
|
Yes
|
No
|
| Battery
charger |
Yes
|
Yes
|
Yes
|
No
|
| Cable |
1.2
m sensor cable, RS-232 cable
|
1.2
m sensor cable, RS-232 cable
|
2.5
to 5 m between sensor / drive and 1 to 100 m between electronics
/ signal processor
|
User
specified
|
| Console |
Yes
|
Yes
|
Yes
|
Yes
|
| GEMLinkW
software |
Yes
|
Yes
|
Yes
|
Yes
|
| Harness
for console |
Yes
|
Yes
|
Yes
|
No
|
| Manual |
Yes
|
Yes
|
Yes
|
Yes
|
| Sensor |
Yes
|
Yes
|
Yes
|
Yes
|
| Shipping
case |
Yes
|
Yes
|
Yes
|
No
|
|
|
