Key Similarities
Both the TSI PortaCount 8048 and the OHD QuantiFit 2 are professional-grade quantitative fit testing instruments designed for high-stakes compliance:
Regulatory Standards: Both units meet OSHA, NFPA, and ISO standards for respirator fit testing [00:19].
Mask Compatibility: Each can be used for elastomeric half-face and full-face respirators [00:26].
Portability: Both systems are portable and require annual factory calibration to maintain accuracy [00:36].
Major Differences
While both achieve the same goal, their methods and capabilities differ significantly:
Testing Technology: The PortaCount 8048 uses a Condensation Nuclei Counter (CNC), which counts ambient particles to measure leakage [00:43]. The QuantiFit 2 uses Controlled Negative Pressure (CNP), creating a vacuum to detect air leaks directly [00:51].
Speed of Testing: A standard PortaCount test takes approximately 10 minutes [00:58]. In contrast, the QuantiFit 2 can complete a full OSHA-compliant fit test in 2 minutes or less using RED protocols [01:54].
N95 Capability: The PortaCount 8048 is capable of testing N95 filtering facepieces [01:05]. The QuantiFit 2 is not designed for N95 testing [01:12].
Environmental Needs: The PortaCount depends on ambient particles; in clean environments like hospitals, you may need a particle generator [01:26]. The QuantiFit 2 is environmentally independent and works in any air quality [01:19].
