The Automated Burris Gravity Meter with V-Grav Control System
It took ZLS over six years to develop a new metal, zero-length spring land gravity meter. The Burris Gravity Meter is not a repackaging of old technology. It is a new meter designed especially to take advantage of the latest advances in digital technology.
The result is a meter with superior digital performance and ease of use. It is the most precise and rugged gravity meter on the market.
V-Grav, the all new Android app, controls and automates the Burris Gravity Meter allowing it to be used with microGal precision.
The Burris Gravity Meter comes in a number of configurations to fit your budget and needs. V-Grav allows the user to choose the level of precision needed for each application. Lower precision results in faster reading times, allowing more stations to be logged in a day. Higher precision allows the Burris Gravity Meter to be used for the most demanding microGal surveys. Whatever your application needs, you now have a choice with V-Grav.
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Highest Quality and Most Precise
Most Rugged Land Meter
ZLS Clamping Mechanism - Eliminates Hysteresis
Earth Tide Monitoring
Real Time Graphics of Beam and Levels
One Tenth of a MicroGal Resolution
Ease of Use for Beginners - Sophisticated for Experts
Automatic Reading
Weather Resistant
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Petroleum Exploration
Mineral Exploration
Civil Engineering
Geophysical Mapping
Geotechnical and Archaeological Exploration
Groundwater and Environmental Studies
Tectonic Research
Volcanology Research
Geothermal Research
Custom Applications for Your Specific Needs
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Introducing V-Grav! Burris Gravity Meter now has graphics!
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The Heart of the Burris Gravity Meter - The Zero Length Spring
Absolute Reliability
ZLS Leveling System
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Geodetic or Regional Meters
Secular (Earth Tide) Meters
Training Orientation Classes
The Heart of The Burris Gravity Meter
Each Burris Gravity Meter is built around a hand made, metal, zero-length spring. ZLS springs have extremely low hysteresis and drift rates. When new, ZLS springs drift approximately 1.0 mGals per month after aging and when mature, drift less than 0.3 mGals per month. Data have shown that the spring’s drift rate improves with age. The prototype had a drift rate of approximately 0.030 mGals per month. The V-Grav Android Application provides unsurpassed precision over large ranges and eliminates a class of errors known as circular error. Calibration values are stable over time as they are determined by a metal micrometer screw. The Burris Gravity Meter has consistently yielded standard deviations of 0.003 mGal or better during routine field tests.
Small, portable and weather resistant, the Burris Gravity Meter contains the sensor, electronics, computer and battery in an “All-In-One” easy to handle unit. The Burris Gravity Meter is sealed to keep out the weather so you do not have to worry about those sudden rain or dust storms. Small in size, with the lithium-ion battery, the meter weighs less than 13 pounds (5.9 kgs). With one battery the meter will last on standby for 16 – 18 hrs. and operate for 14 hrs. at 23°C.
Absolute Reliability
ZLS Corporation has over a century of combined experience in the design and manufacture of metal, zero-length spring gravity meters. The UltraGrav control system has been used and proven in the field by leading universities and agencies around the world since 1994. ZLS has since upgraded the control system to the V-Grav Android Application for use with a tablet to adapt to the ever changing world. The Burris Gravity Meter was developed by the world’s most experienced designer of metal spring gravity meters, Larry Burris. Each Burris Gravity Meter is unconditionally warranted against any defects in parts or craftsmanship for a period of two years and carries a two year warranty against sticking of the mass on the stops.
ZLS Leveling System
The Burris Gravity Meter leveling system is fast and easy to use. It consists of three leveling legs which can be accessed from the top of the meter. The meter can be placed directly on the ground or on a base plate. Under normal field conditions, the Burris Gravity Meter can be precisely leveled for microGal readings within 30 seconds. However, precise leveling is no longer needed as V-Grav can be configured by the operator to perform automatic off level corrections. Unlike bottom leveling systems where the meter is placed blindly into slots, the Burris Gravity Meter is easily placed on the ground or a base plate. With the ZLS manual leveling system there are no motors to reduce battery life or break down during a survey.
Geodetic and Regional Meters
Regional Meter
The Regional Meter is intended for users with short range surveys, flat areas surveys and/or stationary site measurements. This meter is ideal for companies specializing in microgravity surveys, site observation, and universities, due to its lower cost.
Options
Secular (Earth Tide) Meter
For precise earth-tide measurements, the Regional Burris Gravity Meter can be configured with less range for a higher internal resolution of 0.0002 mGals. It has the same specifications as the Regional Burris Gravity Meter except the range is approximately 10 mGal and has the higher internal resolution.
Training Orientation
Classes are available. Please contact us for more information.
(Please put “Training Orientation” in the subject line)
ZLS offers two models of the Burris Gravity Meter : Geodetic and Regional Meters. Both meters are identical in construction, can be used anywhere in the world, and have the same automatic reading resolution of 0.0001 mGal.
Geodetic Meter
The Geodetic Meter is intended for users who routinely have surveys covering large geographic areas, mountainous regions or continental ranges. This model is the preferred choice of survey companies due to its versatility in conducting large geodetic surveys and microgravity surveys with one instrument.
Delivery
Please contact us for current delivery estimate.
(Please put “Delivery Estimate” in the subject line)
Downloadable Brochure
Downloadable User’s Guide
Specifications
Specifications are subject to change without notice. Results may vary depending on conditions.