Caltech Engineering Services offers Tooke Paint Inspection Gauge (Plastic) is a precision tool for inspection and thickness measurement (in accordance withASTM D4138) of single or multiple coats on any substrate, and for microscopic observation and measurement of substrate and film defects. The Tooke Gauge uses an illuminated 50-power microscope equipped with a “universal scope” with a measuring reticle that accommodates measurement in mils, microns, and millimeters. (Note: Each universal microscope is validated before sale against a certified gage block traceable to the National Institute of Standards & Technology (NIST).) This gauge mounts tungsten carbide cutting tips for precise incision of the work surface. Standard cutting tips are 1×, 2×, and 10×. An optional 5× tip is available. Also, a gauge can be ordered with three tips of the same size, or with a single precision-ground tip and two blanks.

Direct measurement of total coating thickness and thickness of individual coats of paint is a unique capability of the Tooke Paint Inspection Gauge. Thus, in addition to routine use, it often serves as a “referee” instrument to calibrate indirect or non-destructive thickness measuring instruments.

Other uses include assessment of substrate conditions and coating adhesion, and observation of microscopic cracking, tendency for brittleness, cratering, or other microscopic film symptoms.

The gauge body is a injection-molded high-impact polycarbonate plastic. It contains the microscope and lamp batteries and the groove-cutting tungsten-carbide cutting tips mounted on the narrow side. Two adjustable threaded guide studs project from the body on the same side as the cutting tips. The tripod thus formed by the three legs (guide studs and cutting tip) provides precise alignment of the tool with the surface to be grooved. A lanyard with keeper looped through the body secures the instrument to the inspector’s wrist. The entire unit is designed for convenience and completeness in field inspection tasks.

Material Polycarbonate plastic body
Overall dimensions 4.5" x 3.5" x 1"
11.4cm x 8.9cm x 2.5cm
Microscope 50-power, 45-degree, illuminated
Power Two 15V AA drycells, plus two spares
Lamp LED 222 bulb plus spare
Cutting tips Tungsten-carbide: 1×, 2×, and 10×
Shipping Weight 1.75 pounds (0.8kg)

For further details please write to us.