Thickness Gauges

Bristol Instruments' optical thickness gauges are a simple and non-destructive way to precisely measure thickness of a variety of transparent and semi-transparent materials. Thickness information is critical in the development and production of materials such as contact and intraocular lenses, and medical products including balloon catheters, stents, bags, and tubing. Bristol combines high accuracy with straightforward operation and rugged design to make these instruments ideal for both laboratory and manufacturing environments.

157 Series

Accuracy of ± 0.1 µm with repeatability of ± 0.02 µm

The 157 Optical Thickness Gauge uses Bristol’s proven optical interferometer-based technology to measure the thickness of a variety of materials. Absolute thickness is measured to an accuracy of ± 0.1 μm and with a repeatability of ± 0.02 μm. This performance is guaranteed over long periods of time by continuously referencing every measurement to a built-in intrinsic standard of length. This ensures the most meaningful test results.

137 Series

Accuracy of ± 1 µm with repeatability of ± 0.05 µm

The 137 Optical Thickness Gauge is a slightly modified version of the industry-leading model 157. It has all the functionality, but is intended for less exacting applications, measuring absolute thickness to an accuracy of ± 1 μm and with a repeatability of ± 0.05 μm.