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Weight Per Gallon Density Cups

Article No. 14170

Aluminum Weight Per Gallon Cup, 100cc

Weight per Gallon Cups also known as Density Cups, Specific Gravity Cups or Pycnometers are used to quickly and accurately determine the weight per gallon, and also the specific gravity of paints, lacquer, pastes, semi-pastes, and other liquid or semi-liquid materials.

 

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$245.00 excl. taxes & shipping cost

Features

  • Meet ASTM Methods of Test
  • Qualify Under ANSI/NCSL Z540-1as Applicable
  • Conform to ISO 9000 When Ordered With Calibration Certification
  • All surfaces are produced to a surface finish better than 32 RMS.
  • Internal corners are rounded to a radius of no less than 0.188."
  • Volume tolerance is within ± 0.5% of correct theoretical value.
  • Volume certification qualifying under ANSI/NCSL Z540-1, as applicable, and conforming to ISO/IEC 17025 is available.
  • Tare weights are Series 300 Stainless Steel, adjusted to within 0.2 gram of cup weight and sized for air cushioning when dropped into the cup for storage.

Technical Attributes

  • Data
    Model:US Standard Weight Per GallonMini Weight Per GallonBritish Standard Weight Per GallonTarelite Weight Per Gallon
    British StandardU.S. Standard
    Capacity:Accommodates 83.205 grams of water at 77.0° F (25.0°C)Accommodates 8.3205 grams of water at 77.0° F (25.0°C)100cc accommodates 99.705 grams of water at 77.0° F (25.0°C)100cc83.2
    Weight:Cup with Cover, approximately 130 gramsCup with Cover, approximately 56 gramsCup with Cover, approximately 143 grams44g47g
    Accuracy:±0.5%±1.2%±0.5%±1%±1%
    Relationships
    Pounds per U.S. Gallon =Gram Weight of U.S. Standard Cup Contents x 0.1000Gram Weight of Mini Cup Contents- Gram Weight of Cup Contents x 0.10000
    Specific gravity =Gram Weight of Cup Contents x 0.01202Gram Weight of Cup Contents x 01202Gram Weight of Cup Contents x 0.01001Gram Weight of Cup Contents x 0.01001Gram Weight of Cup Contents x 0.01202
    Pounds per British (Imperial) Gallon =--Gram Weight of British Standard Cup Contents x 0.1Gram Weight of Cup Contents x 0.1000-
    Grams per liter =---Weight of contents (in grams) x 10-
    Kilograms per Liter =---Weight of contents (in grams) ÷ 100-
    Measurements are normally made at a temperature of 77.0°F (25.0°C)

More Information

Cup Factor - Comparative results on different materials measured in the same cup are accurate to within the limits of accuracy of the balances used. Comparative results between cups may be somewhat improved by determining a cup factor as follows: Divide 83.205 by gram weight of water at 25°C (77°F). Example: if the cup actually holds only 83.000 grams, divide 83.205 by 83.000 which equals 1.0025. Multiply all cup readings by this factor of 1.0025. In the same manner if the cup holds 83.400 (grams) divide 83.205 by 83.400 which equals 0.9977. Multiply all readings by this factor of 0.9977.

Care of Cups - There are numerous grades of Stainless Steel and all of them will corrode under adverse environmental conditions. A common type of Stainless Steel is the 300 Series which is most usually produced in sheets for forming into vats, kettles and the like. This series is highly resistant to corrosion under normal use conditions. It is very difficult, however, to machine this type where close tolerance and smoothness of finish are requirements. Prior to the middle of 1989, Gardco weight per gallon cups were fabricated, using Series 300 Stainless Steel for the sidewall and the more easily machined, but less corrosion resistant, Series 400 Stainless Steel for the base and cover. Since then, with the installation of state of the art computer controlled metal cutting machinery, all Gardco weight per gallon cups are machined from Series 300 Stainless Steel solid bar stock. With the exception of a daily cleaning, Gardco weight per gallon cups are essentially maintenance free. If it is expected that a cup will be stored for an extended period of time, it is recommended that it be given a light coating of protective oil. With only these precautions, the cup should provide long and satisfactory service and retain its original attractive appearance.

Standards

ISO 2811, DIN 53 217, ASTM D1475

Meet ASTM Methods of Test

Qualify Under ANSI/NCSL Z540-1 as Applicable

Conform to ISO 9000 When Ordered With Calibration Certification

Procedure

As a quality control check, errors in composition of a paint will usually be indicated by variations in the pycnometer value. In normal use in the Paint Industry, many specifications will allow a tolerance of about 0.2 pounds per gallon. Any deviation that is larger than this would make the paint suspect regarding the proper amount of ingredients in the batch. 

To check the actual capacity of your cup proceed as follows:

  1. Determine the weight of a clean density cup in grams. As an alternative, the cup may be supplied with an accurate tare weight for use with two-pan laboratory balances. Note: Do not interchange tare weights between cups as each cup and tare weight is matched.
  2. Remove cover of specific gravity cup and fill to within 1.7mm of rim with material to be tested.
  3. Carefully replace cover so that the air and excess material is expelled through vent.
  4. Wipe over cover to remove surplus and reweigh. By subtracting the original weight of the density cup, the weight of the contents will be found. If a tare weight was used at the start, the balance will show the weight of the contents. Clean thoroughly immediately after use.

Test Procedure

  1. Weigh cleaned density cup empty and record weight
  2. Temper density cup and test liquid (Refer to appropriate test standard for proper temperature)
  3. Fill density cup
  4. Put cover on without tilting
  5. Avoid air bubbles
  6. Remove overflowing liquid carefully with absorbent cloth
  7. Weigh filled density cup
  8. Calculate density

Accessories

15193
Pocket Scale 1000 x 0.1G With Weight
$99.95
107414174
17025 Density Cup Certification
$204.00
107414188
Certification, Density Cup w/Tare
$268.00
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