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Home > Products > Density > Weight Per Gallon Cups
Weight Per Gallon Cups

Stainless Steel Series 300

ISO 2811, DIN 53 217, ASTM D 1475

Weight Per Gallon Cups
Made In U.S.A. By Paul N. Gardner Co., Inc.

  • Meet ASTM Methods of Test
  • Qualify Under ANSI/NCSL Z540-1 or
  • MIL-STD-45662A as Applicable
  • Conform to ISO 9000 When Ordered With Calibration Certification

Weight per Gallon Cups 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.

Until the middle of 1989, GARDCO weight per gallon cups were fabricated using Series 300 Stainless Steel for the sidewall and the easier machined but less corrosion resistant Series 400 Stainless Steel for the base and cover. Now, with the installation of state-of-the-art computer controlled metal cutting machinery, these cups are machined from Series 300 Stainless Steel solid bar stock.


Features
  • 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 or MIL-STD-45662A, as applicable, and conforming to ISO 9000 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.

As a quality control check, errors in composition of a paint will usually be indicated by variations in the weight per gallon 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 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 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 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.
  5. By comparing a water sample at a temperature listed in the chart below verification of cup accuracy can be determined.

Temperature Weight
C F STANDARD
Grams
Mini
Grams
British/100cc
Grams
50cc
Grams
21 69.8 83.284 8.329    
22 71.6 83.266 8.327 99.998 49.999
23 73.4 83.246 8.325 99.975 49.987
24 75.2 83.226 8.323 99.950 49.975
25 77.0 83.205 8.321 99.925 49.962
26 78.8 83.183 8.319 99.899 49.949
27 80.6 83.161 8.316    

 

Calibration Demonstration for US Standard WPG Cup

 

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.


References

13th Edition Paint Testing Manual by Gardner/Sward, Part 3, Physical Properties Chapter 3.1, Sect. 3.1.3 Weight Per Gallon. (A.S.T.M., 1916 Race St., Phila., PA 19103). FTMS 141c, Method 4183 “Specific Gravity of Solvents and Thinners”. FTMS 141c, Method 4184.1 “Weight Per Gallon”. ASTM D 333 “Testing Clear Lacquers and Lacquer Enamels”. ASTM D 1475 “Density of Paint, Varnish, Lacquer and Related Products”. ASTM D 2205 “Traffic Paints, Recommended Practices for Testing”. ASTM D 2614 “Hiding Power of Chromatic Paints”. ASTM D 2805 “Hiding Power of Paints”. ASTM D 244 “Emulsified Asphalts”, ASTM D 1875 “Density of Adhesives in Fluid Form”, ASTM D1875 “Standard Test Method for Density of Adhesives in Fluid Form”.


Care of Stainless Steel 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.

- The information contained herein, or supplied by us or on our behalf in any other manner, is based on data obtained by our own research and is considered accurate. However, NO WARRANTY IS EXPRESSED OR IMPLIED REGARDING THE ACCURACY OF THESE DATA, THE RESULTS TO BE OBTAINED FROM THE USE THEREOF. This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for his particular purpose.



U.S. Standard Weight Per Gallon Cup

Stainless Steel Series 300

US Standard
Technical Data

Capacity:

Accommodates 83.205 grams of water at 77.0° F (25.0°C)
Dimensions: 63.5 mm high by 44.5 mm diameter
Weight: Cup with Cover, approximately 130 grams. 
Accuracy: ±0.5%
Relationships
Pounds per U.S. Gallon = Gram Weight of U.S. Standard Cup Contents x 0.1000
Specific gravity = Gram Weight of Cup Contents x 0.01202.  (Measurements are normally made at a temperature of 77.0°F (25.0°C)
US Standard Weight Per Gallon Cup with cover and tare 83.205 millimeter capacity.

Available Items - Literature
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WG-SS-83.2 US Standard 83.2cc Weight Per Gallon Cup with Cover $176.00
WG-SS-83.2/T US Standard 83.2cc with Tare Weight to match weight of cup with Cover 239.00
WG-SS-83.2/C US Standard 83.2cc Weight Per Gallon Cup complete with ANSI/NCSL Z540-1 or Mil-STD-45662A (as applicable) Calibration Certification (conforms to ISO 9000) 336.00
WG-SS-83.2/T/C US Standard 83.2cc Weight Per Gallon Cup with Tare Weight and with ANSI/NCSL Z540-1 or Mil-STD-45662A (as applicable) Calibration Certification (conforms to ISO 9000) 499.00
Check out the Weigh-To-Go Kit, a weight per gallon cup field kit with included balance and calibration check weight.


Mini Weight Per Gallon Cup

Stainless Steel Series 300

One tenth U.S. Standard Cup Volume

Mini
Technical Data

Capacity:

Accommodates 8.3205 grams of water at 77.0° F (25.0°C)
Dimensions: 26.5 mm high by 25.4mm diameter
Weight: Cup with Cover, approximately 39 grams. 
Accuracy: ±1.2%
Relationships
Pounds per U.S. Gallon = Gram Weight of Mini Cup Contents
Specific gravity = Gram Weight of Cup Contents x 0.1202
Measurements are normally made at a temperature of 77.0°F (25.0°C)
Mini Weight Per Gallon Cup with cover and tare 8.321 gram

Available Items - Literature
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WG-SS-8.32 Mini 8.32cc Weight Per Gallon Cup with Cover $170.00
WG-SS-8.32/T Mini 8.32cc WPG Cup with matching Tare Weight 224.00
WG-SS-8.32/C Mini 8.32cc Weight Per Gallon Cup with Cover, complete with ANSI/NCSL Z540-1 or Mil-STD-45662A (as applicable) Calibration Certification (conforms to ISO 9000) 330.00
WG-SS-8.32/T/C Mini 8.32cc Weight Per Gallon Cup with Cover, Tare Weight and with ANSI/NCSL Z540-1 or Mil-STD-45662A (as applicable) Calibration Certification (conforms to ISO 9000) 484.00


British Standard Weight Per Gallon Cup

Stainless Steel Series 300

British Standard 50cc
100cc British Standard Weight Per Gallon Cup
with cover 99.925 milliliter capacity
50cc British Standard Weight Per Gallon Cup
with cover 49.925 milliliter capacity

Technical Data

Capacity:

100cc accommodates 99.925 grams of water at 77.0° F(25.0°C)
Dimensions: 78.3 mm high by 44.5 mm diameter
Weight: Cup with Cover, approximately 143 grams. 
Accuracy: ±0.5% 
Relationships
Pounds per British (Imperial) Gallon = Gram Weight of British Standard Cup Contents x 0.1
Specific gravity = Gram Weight of Cup Contents x 0.01001. 
Measurements are normally made at a temperature of 77.0°F (25.0°C)

Available Items - Literature
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WG-SS-100 100cc British Standard Weight Per Gallon Cup with Cover $233.00
WG-SS-50 50cc British Standard Weight Per Gallon Cup with Cover 198.00
WG-SS-100/T Same as Above with Matched Tare Weight 291.00
WG-SS-100/C British Standard Weight Per Gallon Cup with Cover, complete with ANSI/NCSL Z540-1 or Mil-STD-45662A (as applicable) Calibration Certification (conforms to ISO 9000) 393.00
WG-SS-100/T/C British Standard Weight Per Gallon Cup with Cover, Tare Weight and with ANSI/NCSL Z540-1 or Mil-STD-45662A (as applicable) Calibration Certification (conforms to ISO 9000) 551.00
Check out the Weigh-To-Go Kit, a weight per gallon cup field kit with included balance and calibration check weight.


Tarelight Weight Per Gallon

Aluminum Series

Tarelight

Machined from solid stock, this extremely lightweight cup (less than 50 grams) is formed from high-tensile aluminum 6000 series alloy which combined with alodined coating provides great strength with lightness.

Even when filled with a heavy pigment paint the total weight is well within the capacity of a 250 gram laboratory balance. Dimensions of the 83.2 cup are approximately 45 cm. wide by 57 cm. high.

WG-AL-100 WG-AL-83.2 WG-AL-50  
British Standard U.S. Standard British Standard
(100cc) (83.2cc) (50cc)

Cup Capacity Accuracy Dimensions Weight
British Standard 100cc ± 1% 69mm h x 46mm dia 44g
U.S. Standard 83.2 ± 1% 60mm h x 46mm dia 42g
50cc 50cc ± 2% 36mm h x 46mm dia 31g
U.S. Standard Weight per Gallon Cup:
Pounds per U.S. Gallon = Gram Weight of Cup Contents x 0.10000
Specific gravity = Gram Weight of Cup Contents x 0.01202
British Standard (100cc) Weight per Gallon Cup:
Pounds per British Gallon = Gram Weight of Cup Contents x 0.1000
Specific Gravity = Gram Weight of Cup Contents x 0.01001
Grams per liter = Weight of contents (in grams) x 10
Kilograms per Liter = Weight of contents (in grams) ÷ 100
(50cc) Weight per Gallon Cup:
Pounds per British Gallon = Gram Weight of Cup Contents x 0.2
Specific Gravity = Gram Weight of Cup Contents x 0.02
Grams per liter = Weight of contents (in grams) x 20
Kilograms per Liter = Weight of contents (in grams) ÷ 50

Available Items - Literature
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WG-AL-83.2 U.S. Standard (83.2cc) Weight Per Gallon Cup with Cover $176.00
WG-AL-100 British Standard (100cc) Weight Per Gallon Cup with Cover 192.00
WG-AL-50 British Standard (50cc) Weight Per Gallon Cup with Cover 192.00
WG-CERT Certification for Weight Per Gallon Cup traceable to N.I.S.T - (call for additional cost) add $160.00 to price and a /C to item number.

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