TSI 8048 Portacount quantitative respirator fit tester

The PortaCount Fit Tester Model 8048 provides a consistent and objective testing experience across all respirator types, including all N95 filtering facepieces. FitCheck Mode shows in real-time how respirator fit changes throughout donning and adjustment, helping users select the right mask and identify the best fit more quickly. Video animations guide staff through proper fit test exercise movements during a fit test, providing a consistent testing experience and freeing fit test administrators to multitask. Group fit testing allows administrators to test up to four personnel with four PortaCounts simultaneously.

TSI has redesigned every aspect of the PortaCount Fit Tester’s FitPro Ultra software. An all-new user interface and industry-first features combine to create the most powerful fit test instrument available. From touchscreen tablets to PC laptops, the software is easy to use and similar to applications on your own personal devices.


Fit Factor Range

1 to greater than 10,000, 1 to 200 for N95 masks

Typical Fit Factor Accuracy

±10% of reading

Respirator Facepieces that can be Fit Tested

Full-face elastomeric, Half-face elastomeric, NIOSH series-100 filtering-facepiece, NIOSH series-99 filtering-facepiece, NIOSH series-95 filtering-facepiece, Series FFP1, FFP2, FFP3 respirators

Fit Factor Measurement

Direct measurement of fit factor (Cout/Cin)*


4.83 in. x 10.5 in. x 9.46 in. (12 cm x 27 cm x 24 cm)


Unit Only 7.0 lb. (3.2 kg), With Standard Accessories and Case 15.35 lb. (6.9 kg)


Autosensing 100 to 250 VAC, 50 to 60 Hz

Flow Rate

Sample 350 cm3/min

Total 1000 cm3/min (nominal)

Temperature Range

Operation 32 to 100°F (0 to 38°C), Storage -40 to 122°F (-40 to 50°C)

Working fluid

99.5% reagent grade isopropanol.

Run time per charge: 6 hr of fit testing operational 70°F (21°C)

Carrying Case

Dimensions (HWD) 10.0 in. x 20.5 in. x 15.5 in.

(25.4 cm x 52.1 cm x 39.4 cm)

Pass/Fail Setting

User-selectable: 0 to 10,000

Factory Recalibration Interval

One year


Two years on workmanship and materials.



Minimum PC Hardware Requirements for FitPro Ultra Fit Test Software

Windows® 7 (32 and 64 bit), Windows 8 (32 and 64 bit), or Windows 10 (32 and 64 bit) operating system

Microsoft.Net version 4 (installation software will install Microsoft.Net if necessary) Note — An internet connection is required to install Microsoft.Net

≥ 1 GHz process

≥ 1280 x 800 screen resolution monitor

500 MB free space on a hard drive

1 free USB port

Minimum Tablet requirements

Windows® 10 operating system

USB port (for initial set up)


FitPro Ultra Software featuring advanced user interface, animated graphics, and interactive troubleshooting guide.

Optional Accessories

Mask Sampling Adapters for select respirator models., Microsoft® Surface Pro Tablet (4 GB RAM, 128 GB of storage). WiFi USB dongle.

Additional information


Product Type

Sub Brand



Product Fact Sheet