Weight and Center of Gravity (cog, cg, cm) Measurement Tools https://raptor-scientific.com/products-category/weight-center-of-gravity/ Global Provider of Test & Measurement Solutions Fri, 21 Mar 2025 17:44:28 +0000 en-US hourly 1 https://raptor-scientific.com/content/uploads/2024/04/raptor-A-red-small.png Weight and Center of Gravity (cog, cg, cm) Measurement Tools https://raptor-scientific.com/products-category/weight-center-of-gravity/ 32 32 SE199-SE300 Microbalances https://raptor-scientific.com/products/se199-se300-microbalances/ Mon, 21 Sep 2020 21:31:59 +0000 https://raptor-scientific.com/?post_type=products&p=866 These compact instruments are ideal for very small items (e.g., bullets) and record CG to +/-0.002′. The SE199 and SE300 models are designed to measure weight and precisely locate the CG of very small test objects along a single axis (dual-axis versions of these instruments are also available). They are particularly well suited for locating […]

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These compact instruments are ideal for very small items (e.g., bullets) and record CG to +/-0.002′. The SE199 and SE300 models are designed to measure weight and precisely locate the CG of very small test objects along a single axis (dual-axis versions of these instruments are also available). They are particularly well suited for locating the axial position of the center of gravity of bullets and other small projectiles. The CG of a typical small-caliber bullet can be determined within +/- .002 inches.

The pair of microbalance models are simple to set up and operate for gathering weight and CG data from many payload tests in succession. With the help of our active moment transducers, moment sensitivity up to 0.01 g-mm is obtainable — a degree that far outperforms other instruments of this type. With proper fixturing, the CG of hard drive heads, gyro rotors, small turbine buckets, and other small objects can also be accurately determined. These instruments use the active moment transducer concept developed to achieve a sensitivity that is 100 times greater than usually possible with an instrument of this type.

 

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SE8913 Small Payload Center of Gravity https://raptor-scientific.com/products/se8913-small-payload-series-cg-measurement/ Mon, 21 Sep 2020 21:28:41 +0000 https://raptor-scientific.com/?post_type=products&p=859 Our SE8913 series of instruments offer high accuracy measurement of the CG location for objects weighing up to 33 pounds. This is achieved by measuring the unbalance moment due to the test item’s CG displacement from the center of the rotary table. Included Windows computer interface and software provides data acquisition and calculation of the […]

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Our SE8913 series of instruments offer high accuracy measurement of the CG location for objects weighing up to 33 pounds. This is achieved by measuring the unbalance moment due to the test item’s CG displacement from the center of the rotary table. Included Windows computer interface and software provides data acquisition and calculation of the 2-axis CG location. A third CG axis is obtainable through re-fixturing. Note that the SE8913 series does not measure weight or moment of inertia. This type of instrument is more accurate than a 3-point weight and CG machine.

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SE90168 Production Series https://raptor-scientific.com/products/se90168-production-series/ Mon, 21 Sep 2020 21:22:23 +0000 https://raptor-scientific.com/?post_type=products&p=855 Space Electronics SE90168 instruments provide rapid center of gravity measurement of items under 300 lb / 140 kg. Designed as an entry point into center of gravity measurement, they use conventional technology to measure payloads from 2 to 125 lbs with medium accuracy. Models offer rapid measurements of items under 300 lbs. Weight and CG can be […]

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Space Electronics SE90168 instruments provide rapid center of gravity measurement of items under 300 lb / 140 kg. Designed as an entry point into center of gravity measurement, they use conventional technology to measure payloads from 2 to 125 lbs with medium accuracy.

Models offer rapid measurements of items under 300 lbs. Weight and CG can be measured simultaneously using one of our SE90168 Series instruments. The SE90168 Series of weight and CG instruments is designed for the rapid measurement of weight and CG with the level of accuracy associated with a high-volume production environment. Four standard models deliver medium accuracy and convenience. SE90168 instruments can take a dual-axis measurement once an object is positioned onto the square or triangular plate. Similar to the WCG Series, SE90168 instruments can measure a third CG coordinate. Automated operation software makes CG measurement a seamless process.

These instruments use the multi-point weighing method to simultaneously measure both weight and two coordinates of center of gravity. The operator may simply rotate the payload by 90 degrees to obtain the third coordinate of CG.

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Mass (Weight) Instruments: WCG High-Accuracy https://raptor-scientific.com/products/mass-weight-instruments-wcg-high-accuracy/ Mon, 21 Sep 2020 21:14:35 +0000 https://raptor-scientific.com/?post_type=products&p=851 Weight Center of Gravity is measured with high accuracy on items up to 2,850 lb / 1,300 kg with our WCG Measurement Instruments. These instruments use the multi-point mass weighing method to simultaneously measure both mass (weight) and center of gravity (CG). This type of instrument does not incorporate a rotary table, so it can […]

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Weight Center of Gravity is measured with high accuracy on items up to 2,850 lb / 1,300 kg with our WCG Measurement Instruments.

These instruments use the multi-point mass weighing method to simultaneously measure both mass (weight) and center of gravity (CG). This type of instrument does not incorporate a rotary table, so it can be difficult to determine the location of the object relative to the instrument measurement axes. Accuracy is limited, particularly for tall objects. If you need a high accuracy CG instrument, then we recommend our KSR series instruments.

Less than one minute is required to make a measurement, so these instruments are ideally suited to high volume production. This type of instrument is often used to measure “black boxes” used in aircraft and missiles.

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Weight and CG of Large Objects and Spacecraft https://raptor-scientific.com/products/weight-and-cg-of-large-objects-and-spacecraft/ Mon, 21 Sep 2020 21:10:26 +0000 https://raptor-scientific.com/?post_type=products&p=848 Measuring the center of gravity (CG) location of large spacecraft presents many of the same challenges encountered when measuring small objects. Common requirements for the measuring device include: establishing known geometry, maintaining geometry over the full range of load conditions, selecting force transducers with appropriate sensitivity to support the desired measurement performance, preserving that sensitivity throughout […]

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Measuring the center of gravity (CG) location of large spacecraft presents many of the same challenges encountered when measuring small objects. Common requirements for the measuring device include: establishing known geometry, maintaining geometry over the full range of load conditions, selecting force transducers with appropriate sensitivity to support the desired measurement performance, preserving that sensitivity throughout the measurement, and devising a method to relate the spacecraft’s datum to the instrument’s datum.

The WCG High-Accuracy Series tests items up to 2,850 lbs, with ultra-high sensitivity models available. These instruments use a load cell system to measure the location of center of gravity using a weighted average. To measure an object, simply lower it onto the triangular table and position it relative to machine zero. The third CG coordinate can be measured after rolling an object 90 degrees. CG accuracy depends on test object weight, center of gravity height, fixture accuracy and leveling. Less than one minute is required to make a measurement, so these instruments are ideally suited to high volume production. This type of instrument is often used to measure “black boxes” used in aircraft and missiles. The five standard C series models are a lower-cost alternative and suitable for general purpose applications. We recommend them for laboratories that don’t require the highest precision.

Our hardware enabled the Boeing CST-100 Starliner team to take highly accurate mass properties measurements ahead of flight testing.

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KSR CG/MOI https://raptor-scientific.com/products/ksr-cg-moi/ Thu, 17 Sep 2020 22:30:18 +0000 https://raptor-scientific.com/?post_type=products&p=762 0.1% of measured value, world’s most accurate instruments; 0.25 to 25,000 lb / 0.1 to 11,500 kg. Space Electronics KSR series instruments continue to offer the highest accuracy available for CG and MOI measurement. These combined instruments are available in a variety of sizes and measure two coordinates of center of gravity and one moment […]

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0.1% of measured value, world’s most accurate instruments; 0.25 to 25,000 lb / 0.1 to 11,500 kg. Space Electronics KSR series instruments continue to offer the highest accuracy available for CG and MOI measurement. These combined instruments are available in a variety of sizes and measure two coordinates of center of gravity and one moment of inertia in one setup.

Typical Applications

KSR series are used primarily by the defense and space industries for measurement and verification/validation of center of gravity (CG) and moment of inertia (MOI) in high end payloads such as:

  • Spacecraft: Satellites and Vehicles, Manned and Unmanned
  • Spacecraft components and cargo
  • Military payload: Bombs, missiles, torpedoes, and their components
  • Aircraft: UAV and Flight Hardware
  • Aircraft engines
  • Ground Vehicles: Automotive engines and transmission components

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