+1 (954) 946-9454

Viscosity Oils

Article No. 13639

G6 Viscosity Oil w/Cert, 9 cS

  • G6 Viscosity Oil
  • With certification
  • 9 centistokes


Insta-Visc App


Select your model

$114.00 excl. taxes & shipping cost


  • The G (Gardner) Series Viscosity Oils are certified viscosity reference standards used for the calibration Gardco Viscosity Cups, viscometers and rheometers. They facilitate accurate measuring for a variety of procedures associated with determining a fluid's resistance to flow.
  • All oils come certified and traceable to NIST this document is the  Certificate of Analysis, the Long Form certificate is  an “Additional  document” that supplements the traceability information that is  described on the Certificate of Analysis.
  • Oils with Long Form Certification include data points
  • All Cannon Viscosity Oils are packaged in sealed, dark glass bottles. Net content of each bottle is 0.47 Liter (1 Pint)
  • A label on each bottle gives the Viscosity Oil Name, Lot No., Termination Date, Viscosity in Centistokes at 25.00C (77.00F)* and a statement that the standard "is prepared expressly for Paul N. Gardner Co." by the Cannon Instrument Company and that data on the standard is traceable to the National Institute of Standards and Technology (NIST). *With the exception of the Parlin Cups whose Viscosity in Centistokes is measured at 23C in accordance with ASTM specification.
  • A Material Safety Data Sheet (M.S.D.S.) accompanies each bottle of viscosity oil
  • These viscosity oils prepared expressly by the Cannon Instrument Company for the Paul N. Gardner Company are produced in accordance with: ISO/IEC 17025, ISO 17025 and Guide 34 and ISO 9001. Viscosities for all standards sold by CANNON are based on the National Institute of Standards and Technology (NIST) value of 1.0016 mPa•s (centipoise) for water at 20°C (68°F).
  • CANNON has been granted ISO 9002 registration for the manufacture and certification of viscosity standards.
  • They are accurate to within 0.25% of the label value at specified temperature. This is a much closer tolerance than viscosity measuring devices normally available to users of viscosity cups. Therefore, there is no easy means of checking the viscosity to ensure that it remains at the value listed on the label except through very careful use of the standard to ensure its integrity. Included in this care should be making sure that any container used to receive the viscosity oil, as well as the cup to be checked, the thermometer and any other stirring device, be absolutely free of contaminants.
  • Immediately following use, the standard should be returned to its labeled container and capped. If there is valid reason to question the original value of the viscosity standard, it should be replaced.
  • The viscosity oils are used by the producer of Gardco viscosity cups not only to calibrate the cups but also to certify such calibration under ANSI/NCSL Z540 or ISO/IEC 17025, ISO 9001, as applicable, and in conformance with ISO 9000, which is available as an extra cost of service. One of the requirements under such certification is the replacement of the viscosity standard on or before the termination date. Experience has shown, however, that in the absence of contamination, the standards do not materially deteriorate over an extended period of time.
  • CAUTION: Silicone fluids should not be used to calibrate viscosity cups. These materials change the interface between the cup surface and the test material and therefore change the cup calibration. The following is taken from ASTM D445; Viscometers used for silicone fluids should be reserved for the exclusive use of such fluids. Solvent washings from these viscometers should not be used for cleaning other viscometers.

Technical Attributes

  • Data

    Viscosity Oil

    Centistoke ¹
    EZ Cup No.S90 / Zahn Cup No.Mini Ford Dip Cup No.Gardco / Fisher Dip Cup No.Fisher Std Cup No.Std. Ford & Std. Ford Dip Cup No.Gardco/ISO & ISO Dip Cup mmGardco/Din & Din Dip Cup mmParlin Cup No.
    G60120223, 4333, 4---
    G2004503, 4-5445---
    G35088054, 5----8 ²--
    ¹ These are nominal values. For the actual centistoke value of the standard, refer to the value on the bottle label.
    ² NOTE: The 8mm ISO Cup is not available in the Dip version
    *Special temperature at 23°C

More Information

Efflux time to the nearest 0.1 second can be read from the conversation chart furnished with each Gardco produced cup, or a formula can be used as follows:

  1. Select the formula relating viscosity to time of efflux in seconds when viscosity in centistokes is known.
  2. Substitute the viscosity label value for centistokes for "V" in the equation and solve the equation. The resulting value is design efflux (drain) time in seconds. Note: This determined efflux time is for the standard at 25.00C (77.00F) only*.
  3. Make a minimum of three determinations with the cup in question on the applicable standard, adhering to the method of use prescribed in the product leaflet or in the applicable ASTM method, and calculate the average efflux time. Note: Pay particular attention to temperature at time of measurement. Use a thermometer that can be read to the nearest 0.1 C or 0.2 F. Experimental results should NOT be compared against determined design efflux time unless temperature at time of measurement was within +/- 0.2 of 25.0 C or +/- 0.4 of 77.0 F*. The standard oils change in viscosity between 3% and 8%, depending on the viscosity of the standard, for each degree change in temperature from 25C*.
  4. Compare the experimentally determined efflux time with the design efflux time. If experimental results were at 25.0 C or 77.0 F*, the comparison should be within the following limits: *With the exception of the Parlin Cups whose Viscosity in Centistokes is measured at 23C in accordance with ASTM specification.
  • Gardco EZ Zahn (ASTM) Dip Cups 3%
  • Gardco S90 Zahn Sig. Dip Cups 5%
  • Gardco Mini Ford Dip Cups 4%
  • Gardco/Fisher Dip Cups 2%
  • Gardco/Fisher Standard Cup 2%
  • Gardco Standard Ford Cups 2%
  • Gardco Standard Ford Dip #3 3%
  • Gardco Standard Ford Dip #4 2%
  • Gardco Standard Ford Dip #5 3%
  • Gardco/ISO Cups 2%
  • Gardco/ISO 8mm Cup 3%
  • Gardco/ISO Dip Cup 3%
  • Gardco/DIN Cup 3%
  • Gardco/DIN Dip Cup 3%
  • Gardco Parlin #1 Cup 3%
  • Gardco Parlin #2 Cup 3%
  • Gardco Parlin #3 Cup 3%
  • Gardco Parlin #4 Cup 5%

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, OR THAT ANY SUCH USE WILL NOT INFRINGE ANY PATENT. 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.


Manual Temperature Adjustment - For the technician who does not have automatic temperature control equipment, the following procedure may be useful with viscosity dip type cups: If the oil to be used is below temperature, place the bottle with the cap slightly loosened no closer than about one foot from an incandescent desk lamp. This will slowly raise the temperature of the oil. When within about one degree of measuring temperature, transfer the required amount of the oil to a glass container of sufficient height and diameter to accommodate the viscosity cup. (Glass is recommended due to its low rate of temperature conductance). Place the viscosity cup to be used in the oil in the glass container so that it comes to the same temperature as the oil and place a thermometer, preferably glass, in the oil which can also be used as a stirring rod. If necessary, to elevate the temperature slightly, simply hold the glass snugly in the hand while stirring the contents gently and observing the change in temperature. If necessary, to lower the temperature, dip the bottom of the glass container for a few seconds in water that is 10 to 20 degrees lower than measuring temperature and continue gentle stirring while the temperature slowly lowers. With a little practice it is possible to make measurements very close to the target temperature.

Guide for removing the calibrated oil from Gardco viscosity cups - Any remaining material in the cup must be removed by flushing with a suitable solvent. Light naphtha, heptane, octane, highly aromatic solvents, and or any other petroleum-derived hydrocarbon solvent can be used. Varsol® is a commercial solvent that works very well for this purpose. Varsol is a registered trademark of the Exxon Company. Completely dry the viscosity cup with a lint free cloth. Use a highly volatile solvent for a second cleaning as since any remaining hydrocarbon solvents from the first process will evaporate quickly after the sample has been flushed from the cup. Hypersolve, MEK and Alcohol can be used in aluminum cups and Hypersolve and Alcohol for the stainless steel cups. Acetone is commonly used as the second solvent because of its high volatility and its ability to dissolve traces of petroleum solvents and water. In the third process a low velocity stream of clean air will be sufficient to evaporate remaining traces of any volatile solvent. Be aware, avoid rapid evaporation of these solvents as this can cool the surface to such an extent that humid air may be brought below the dew point, causing a film of water to form on the cup.

Viscosity oils available from the Paul N. Gardner Company are NOT recommended for use with cups produced by other suppliers unless the conversion formula between centistoke viscosity and efflux time as well as cup production tolerance for the particular cup in question has been furnished.

Delivery Content

A Material Safety Data Sheet is furnished with each bottle of "G" Series Standard Viscosity Oils. A certificate of analysis is included with all the certified oils. The Long Form Certificate has a Statement of Traceability that supplements the Certificate of Analysis that is already supplied with all the certified oils.

Join our Email List. subscribe