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

Weight Per Gallon Density Cups


ISO 2811, DIN 53 217, ASTM D1475

Weight Per Gallon Cups

  • Meet ASTM Methods of Test
  • Qualify Under ANSI/NCSL Z540-1 as Applicable
  • Conform to ISO 9000 When Ordered With Calibration Certification
  • Stainless Steel 300
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.

Until the middle of 1989, GARDCO weight per gallon density 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 specific gravity 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, 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.
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.

Instructions for Use

  • Weigh cleaned density cup empty and record weight
  • Temper density cup and test liquid (Refer to appropriate test standard for proper temperature)
  • Fill density cup
  • Put cover on without tilting
  • Avoid air bubbles
  • Remove overflowing liquid carefully with absorbent cloth
  • Weigh filled density cup
  • Calculate density

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 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. 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 D333 “Testing Clear Lacquers and Lacquer Enamels”. ASTM D1475 “Density of Paint, Varnish, Lacquer and Related Products”. ASTM D2205 “Traffic Paints, Recommended Practices for Testing”. ASTM D2614 “Hiding Power of Chromatic Paints”. ASTM D 2805 “Hiding Power of Paints”. ASTM D 244 “Emulsified Asphalts”, ASTM D1875 “Density of Adhesives in Fluid Form”, ASTM D1875 “Standard Test Method for Density of Adhesives in Fluid Form”.

U.S. Standard - Weight Per Gallon Density Cup

US Standard Weight Per Gallon Cup
Technical Data

Capacity:

Accommodates 83.205 grams of water at 77.0° F (25.0°C)
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)

Mini - Weight Per Gallon Density Cup

Mini Weight Per Gallon Cup
Technical Data

Capacity:

Accommodates 8.3205 grams of water at 77.0° F (25.0°C)
Weight: Cup with Cover, approximately 56 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)

British Standard - Weight Per Gallon Density Cup

British Standard Weight Per Gallon Cup 100cc

100cc British Standard Weight Per Gallon Cup with cover


Technical Data

Capacity:

100cc accommodates 99.705 grams of water at 77.0° F (25.0°C)
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)

ISO Density Cup S - Weight Per Gallon Density Cup

British Standard Weight Per Gallon Cup 100cc
  • Made from corrosion resistant steel
  • Compliant with ISO 2811 and DIN 53217 methods or ASTM D 333, D 1475, D 2805
  • Precisely made for maximum accuracy

Technical Data
Volume: 50 ml
Weight: 0.23 kg (0.5 lbs)

Tarelite - Weight Per Gallon Density Cup

Tarelight Weight Per Gallon

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.


Technical Data
Cup Capacity Accuracy Approximate Weight
British Standard 100cc ± 1% 44g
U.S. Standard 83.2 ± 1% 47g
50cc 50cc ± 2% 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

Weight Per Gallon Density Cup Video


Prices

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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
U.S. Standard Weight Per Gallon Density Cups
WG-SS-83.2 US Standard 83.2cc Weight Per Gallon Cup with Cover $194.25
WG-SS-83.2/T US Standard 83.2cc with Tare Weight to match weight of cup with Cover 263.55
Mini Weight Per Gallon Density Cups
WG-SS-8.32 Mini 8.32cc Weight Per Gallon Cup with Cover $187.95
British Standard Weight Per Gallon Density Cups
WG-SS-100 100cc British Standard Weight Per Gallon Cup with Cover $257.25
WG-SS-100/T 100cc British Standard Weight Per Gallon Cup with Cover with Matched Tare Weight 321.30
ISO Density Cup S
1142 50cc ISO Density Cup S Weight Per Gallon Cup with Cover $235.00
Tarelite Weight Per Gallon Density Cups
WG-AL-83.2 U.S. Standard (83.2cc) Weight Per Gallon Cup with Cover $194.25
WG-AL-100 British Standard (100cc) Weight Per Gallon Cup with Cover 212.10
WG-AL-50 British Standard (50cc) Weight Per Gallon Cup with Cover 212.10
Certification
107414174 17025 Certification - add $176.40 for certificate for cup, add $260.45 for certificate for cup with tare
Check out the Weigh-To-Go Kit, a weight per gallon cup field kit with included balance and calibration check weight.



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