Model C Wet Film Thickness Gauge

The Model C Wet Film Thickness gauge is a precision instrument for use in the laboratory, the field and on the production line. It accurately measures the wet film thickness of paint, varnishes, lacquers, adhesives, inks, gel coats and almost any type of wet film applied to flat or cylindrical surfaces.

The model C gauge was developed by Maynard R. Euverard to take full advantage of features covered in patents issued to him under U.S. Patents 2,507,592 and 3,128,558.

The gauge is in the form of a wheel, approximately two inches in diameter, made up of three disk sections. Two of the disks are of the same diameter, spaced apart adequately for gauge support and are concentric. The third disk, somewhat smaller, is located on the outside of the supporting disks and is eccentric to them. When the gauge is rolled over a wet film the eccentric disk will pick up the material only at and below the actual thickness, which permits its immediate and direct reading.

• Accuracy certification available
• The scale is engraved directly on the measuring disk which is moved to the outside of the gauge and eliminates reading errors of parallax.
• The measuring disk is separated from a supporting disk by less than half the distance found in other gauges for similar use, which minimizes errors due to deviation from flatness of the supporting surface.
• All gauge markings are engraved rather than stamped to avoid strains in the gauge which could reduce gauge accuracy.
• Stainless steel surfaces of the gauge are highly polished to enhance gauge cleaning.
• The support surfaces of the concentric disks are designed to insure the best possible penetration to the coating support surfaces.
• Development of new "state of the art" jigs and fixtures insure production of each and every gauge to within the closest possible tolerance consistent with the best available tool and die metal working equipment.
• The gauge bearings are of special design to provide the lowest possible starting torque and to provide ease of cleaning by removal of one of the finger grips. Ball or roller bearings have been found to be unsatisfactory due to their sensitivity to cleaning solutions.
• The most modern type of three dimensional coordinate measuring machine with a resolution and repeatability equal to or better than 0.0001 inches is now used in the production and inspection of the gauges.

Select the Model C gauge with the range which will accommodate the thickness to be measured between 10% and 90% of the gauge range. Grasp the gauge with the thumb and forefinger so that the gauge body is free to turn. Place the gauge on a freshly coated surface at a thickness position greater than expected and roll the gauge to a thickness less than expected.

The gauge may then be lifted and placed on another part of the surface and rolled in the opposite direction on the unused portion of the gauge. Examination of the outside eccentric disk will show thickness values at which pick-up of the coating has taken place and the average of these values may be taken as the true coating thickness.

• Calibration is traceable to the U.S. National Institute of Standards & Technology
  
• Calibration procedures qualify under ANSI/NCSL Z540-1 as applicable, and ISO 9000
  
• Certification of Calibration available at an additional charge

• ASTM D1212 -"Measurement of Wet Film Thickness of Paint, Varnish, Lacquer, and Related Products."
  
• ASTM D823 - "Producing Films of Uniform Thickness of Paint, Varnish, Lacquers and Related Products on Test Panels."
  
• ASTM D1005 - "Measurement of Dry Film Thickness of Organic Coatings."
  
• ASTM D1186 - "Measurement of Dry Film Thickness on Non-Magnetic Coatings applied to a Ferrous Base."
  
• ANSI/NCSL Z450-1 or ISO 9000
• ASTM D1400 - "Measurement of Dry Film Thickness of Nonmetallic Coatings of Paint, Varnish, Lacquers, on a Nonmagnetic Base."
  
• ASTM E376 - "Recommended Practice for Measuring Coating Thickness by Magnetic Field or Eddy Current (Electromagnetic Test Methods)."
  
• FTMS 141a, Method 6141c - "Dry Film Thickness (Magnetic Type gauges)."
  
• FTMS 141c, Method 6183 - "Dry Film Thickness (Mechanical Type gauges)."
  

A brand New ergonomic gauge handle is now available for the Model C gauge. It offers a very comfortable, precision grip handle that can be quickly and firmly attached to or removed from the Model C gauge. It is useful as an aid in aligning the gauge on the test surface.

When the gauge is used on a moving surface, the handle aids the user to keep his hand at a distance from such surface. It also may prevent the possibility of dropping the precision instrument onto a costly rotating roller.

The handle is about six inches long and is produced from solid bar stock aluminum. The handle axle is designed to accept all Gardco produced Model C gauges and IC gauges.

The gauge is held in place on the handle with one of the gauge grips so it is readily removable for cleaning or for reassembly for use of the gauge with grips only.