Gravity Meter (Land / Airborne / Marine)

Micro-g LaCoste, the leading manufacturer of absolute, dynamic and borehole gravity meters, supplies state of the art instruments and survey solutions globally. With our knowledgeable and experienced staff, we are here to assist you with all your gravity requirements.

Land Gravity

A10 Portable Absolute Gravity Meter

The A10 is an absolute gravimeter optimized for fast data acquisition and portability in outdoor applications. The instrument allows operation in harsh field conditions on open outdoor sites in the sun, snow, and wind.

  • Automated leveling
  • Battery operated
  • Temperature controlled sensor
  • Ideal roadside operation from a vehicle

Subcomponents

  • Evacuated dropping canister
  • Internal drag free chamber
  • Balanced test mass
  • Rigid Tripod system
  • Optical Interferometer
  • Integrated Tilt-sensors
  • Miniaturized Superspring
  • High speed photodetector
  • ML-1 polarization stabilized laser
  • Electronics package
  • System controller
  • Real-time gravity reduction software

Specifications

Specifications
Input Power 12-14 DC (vehicle or from lab based 100-240VAC supply –included)
Full Load 25A (300W)
Average Load 16A (200W)
Weight 105kg
Accuracy 10μGal (Absolute)
Precision 10μGal in 10 minutes at a quiet site
Operating temp. Range -18˚C to +38˚C continuous operation

CG-6 Autograv™ Gravity Meter

The CG-6 Autograv™ is the next generation land gravity meter combining a modern, intuitive user interface with our renowned quartz sensor technology housed in a rugged yet lightweight enclosure. The new CG-6 offers fast, reliable and precise gravity measurements and includes an array of mapping and post processing functionality with our new Lynx LG software conveniently installed on the tablet computer, provided as a standard feature.

STANDARD SYSTEM CONTAINS

  • CG-6 Autograv™ Gravity Meter
  • CG-6 Tripod
  • 2 Rechargeable Smart Batteries
  • Battery Charger
  • Tablet Computer w/GPS + accessories
  • Lynx LG Land Gravity Software
  • Power Supply and USB Cable
  • Transit Case
  • Shoulder Strap
  • User Manual
  • Spare Parts Kit
  • Carry Bag

AVAILABLE OPTIONS AND ACCESSORIES

  • High-Temperature (HT) Meter Option
  • Cold Weather Survey Accessories
  • Surveyor’s Backpack
  • Spare Meter Batteries
  • Spare Tablet Batteries
  • Trident Gradient Tripod
  • Spare Battery Caps

Specifications

Specifications
Sensor Type Fused quartz using electrostatic nulling
Reading Resolution 0.1 microGal
Standard Deviation < 5 microGal
Operating Range World-wide (8,000 mGal without resetting)
Residual Drift < 20 microGal/day
Uncompensated Drift < 200 microGal/day
Range Of Automatic Tilt Compensation ±200 arcseconds
Tares Typically < 5 microGal for shocks up to 20 g
Automated Corrections Tide, instrument tilt, temperature, noisy sample filter, seismic noise filter, drift
Data Output Rate User selectable up to 10 Hz
GPS Accuracy Standard < 3 m
Touch-free Operation Handheld Tablet with Bluetooth
Battery Capacity 2 X 6.8 Ah (10.8 V) rechargeable lithium smart batteries. Full day operation at 25 °C (77 °F)
Power Consumption 5.2 Watts at 25 °C (77 °F)
Operating Temperature -40 °C to + 45 °C (-40 °F to 113 °F); Optional high temperature version to +55 °C (131 °F)
Digital Data Output USB and Bluetooth
Dimensions 21.5 cm(H) x21 cm x 24 cm (8.5 in x 8.2 in x 9.4 in)
Weight 5.2 kg (11.5 lbs) including batteries

FG5-X Absolute Gravity Meter

Micro-g LaCoste is proud to announce the new state of the art in absolute gravity measurements! The FG5-X is a “follow on” instrument to the “absolute standard” that is the FG5 freefall gravimeter. The FG5-X featrues an improved dropping chamber and an improved electronic interface

Specifications

Specifications
Total Shipping Weight 150 kg in 6 containers
Total Volume 1.5 m3
Floor Space Requirement 3 m2
Input Voltage 110-240 VAC, 50-60 Hz
Nominal Power Requirement ~500 W
Accuracy 2 μGal
(observed agreement between FG5 instruments)
Precision 15 μGal/sqrt(Hz) at a quiet site [eg. ~1 μGal in 3.75 minutes, or 0.1 μGal in 6.25 hours]
Operating Dynamic Range World-Wide
Operating Temperature Range 20˚C to 30˚C

FGL Absolute Gravity Meter

The FG5-L series absolute gravimeter is a simplified version of the FG5 absolute gravimeter optimized for small size, speed of data acquisition, ease of use, portability and price. Many of the subcomponents of the FG5-L are compatible with the FG5 in order to allow an upgrade path to the FG5. This gravimeter offers an attractive trade-off between low price and precision in an instrument that is easy to use in the field.

Specifications

Specifications
Total Shipping Weight 140 kg in 6 containers
Total Volume 1.5 m3
Floor Space Requirement 3 m2
Input Voltage 110-240 VAC, 50-60 Hz
Nominal Power Requirement ~500 W
Accuracy 10μGal (Absolute)
Precision 10μGal in 10 minutes at a quiet site
Operating Dynamic Range World-Wide
Operating Temperature Range 20˚C to 30˚C

gPhoneX Gravity Meter

The Micro-g LaCoste gPhoneX gravity meter uses the Zero-Length Spring™ sensor technology to provide microGal repeatability with very low static drift, which makes it the best suited as a monitoring meter. Whether you are interested in earthquake or volcanic studies, earth tide or reservoir monitoring, the gPhoneX will out perform all others. The gPhoneX can also be used as an ultra sensitive low frequency seismometer for these areas of studies.

UPS Power Test Conditions

  • UPS fully charged prior to blackout
  • Load on UPS is timing box and meter only
  • Ambient temperature 27°C
  • Meter temperature is at steady state at time of the blackout

Specifications

Specifications
Input Power 12-14 DC (vehicle or from lab based 100-240VAC supply –included)
Full Load 25A (300W)
Average Load 16A (200W)
Weight 105kg
Accuracy 10μGal (Absolute)
Precision 10μGal in 10 minutes at a quiet site
Operating temp. Range -18˚C to +38˚C continuous operation

Airborne Gravity

TAGS-7 Dynamic Gravity Meter

TAGS-7 represents the latest development in a long line of LaCoste-based airborne gravity systems, stretching back to the first successful airborne gravity flights in 1958 and building on the success of the TAGS System. For over 50 years, LaCoste gravimeters have acquired hundreds of thousands of line kilometers of gravity data during academic, government, and commercial surveys. TAGS-7 blends the latest in GPS and data acquisition technology with the solid foundation of the LaCoste dynamic gravimeter. TAGS-7 is an upgrade to the TAGS-6 gravity meter, and is designed specifically for airborne operations. The system incorporates a time-tested, low-drift, zero-length-spring gravity sensor mounted on a gyro-stabilized gimbal platform. The sensor has a worldwide gravity measuring range (no reset necessary) of 500,000 milliGals.

Specifications

Specifications
Component Variable Specifications
Survey Quality Repeatability 0.75 milliGal
Sensor Worldwide Range:
Dynamic Range:
Drift:
Temperature Setpoint:
20,000 milliGal
±500,000 milliGal
3 milliGal per month or less
45° to 65°C
Stabilized Platform Platform Pitch:
Platform Roll:
Control Period:
Control Damping:
± 25 degrees
± 35 degrees
4 to 4.5 Minutes
0.707 of critical
Control System Recording Rate:
Serial Output:
Additional I/O:
20 Hz
RS-232
Sensor Temperature
Miscellaneous Operating Temperautre:
Storage Temperautre:
Power Equipments:
Dimensions:
5° to 50°C
-10° to 50°C
75W @ 27°C Nominal, 300W Peak, 80-265VAC, 47 – 63Hz
58.4 x 53.3 x 55.9 cm (not including electronics)

Marine Gravity

MGS-6 Marine Gravity System

Micro-g LaCoste is proud to announce the next generation of marine based dynamic gravity meters: The Marine Gravity System-6 (MGS-6). It represents the next generation in a long line of LaCoste-based dynamic gravity systems, stretching back to the first successful dynamic gravity meter tests on ships more than 50 years ago. Note though, that the MGS-6 is more than a simple upgrade to the Air-Sea System II (AS-2). The MGS-6 is based on the smaller, lighter, more power-efficient TAGS-6 (airborne) platform, and employs the same full-force feedback sensor. In both systems, the platform control and data acquisition system have been overhauled, resulting in unparalleled data quality.

Specifications

Specifications
Component Variable Specifications
Sensor Worldwide Range:
Drift:
Temperature Setpoint:
Range: ± 500,000 milliGal
3 milliGal per month or less
45° to 65° C
Stabilized Platform Platform Pitch:
Platform Roll:
Control Period:
Control Damping:
± 25 degrees
± 35 degrees
4 to 4.5 Minutes
0.707 of critical
System Performance Dynamic Range:
Static Repeatability:
Dynamic Repeatability:
25,000,000
0.02 milliGal in 2 minutes
0.75 milliGal in 2 minutes
Control System Recording Rate:
Additional I/O:
1 Hz
Electronics, Sensor Temperature, Sensor Pressure
Miscellaneous Operating Temperautre:
Storage Temperautre:
Power Inputs (Into UPS):
Dimensions:

Weight:
5° to 50°C
-10° to 50°C
75 Watts average at 27°C, 300 Watts maximum
61.4 x 55.5 x 72.0 cm
(including UPS and built in electronics rack)
68kg (Sensor, Gimbal,and Frame), 101kg (all components).