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TSI manufactures particle sizing instrumentation and systems that span the particle size range from 1 nm to 20 micrometers.

The new PortaCount® Fit Tester combines real-time and real-world measurements to advance respirator safety beyond what any other fit test can deliver.

Trade in your respirator fit tester for a $2,000 credit toward the latest PortaCount Respirator Fit Tester

Flexible, conductive tubing in four sizes to accommodate most experimental setups.