TSI to Discontinue Calibration Services for certain PortaCount® Models

Have you been waiting for the right time to upgrade your fit tester from the TSI PortaCount® to the revolutionary OHD Quantifit®? Aren't you tired of the inconvenience of sometimes having to ensure...
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Respiratory Mask Fit Testing with Facial Hair

The OHD Quantifit: ohdusa.com/products/quantifit
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OHD Quantifit - Mask Respiratory Fit Testing

The OHD Quantifit - The Fastest and most Accurate Fit Test - User Testimonial

Below is a recent OHD Quantifit® customer testimonial sent in by an onsite workplace safety solutions company based out of California:
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