TBL Plastic

Polysulfone Sight Gauges

Sanitary Sight Indicators for Bio-Pharm and Industrial Process

polysulfone sight gaugesPolysulfone Sight Glasses

TBL now manufactures several sizes of polysulfone Tri-Clamp site gauges. With a temperature range of -20 to 240°F and excellent chemical resistance, our site gauges are ideal for repeated use in harsh process conditions.

Our materials of construction are widely specified and approved for fluid contact in various critical bio-processing applications. They are also ubiquitous in food processing and industrial chemical processing applications. Our sight gauges mate with all standard sanitary Tri-Clamp fittings and clamps.


SizeABPart Number

Standard Sizes: 3″, 6″, 12″, 24″, 36″, 48″, 60″, and 120″
All Lengths from 3″ to 120″ Available

ISO 10993
USP Class VI
FDA 21 CFR 177.1655
Note: Material properties may be affected greatly by temperature, operating pressure, chemical concentration, the presence of other chemicals, and other factors. Ultimately, users should determine the compatibility of any product through their own testing. Specifications are subject to change without notice.