The TSI Alnor AeroTrak 9303-01 is a handheld laser air particle counter designed for cleanroom monitoring, indoor air quality testing, and HVAC evaluations. Featuring a 0.1 CFM flow rate and 3-channel particle detection (0.3 µm, 0.5 µm, 5.0 µm), this meter features a backlit LCD screen, internal data logging, and USB connectivity.
We have inspected this item and it powers on. We do not have the capability to test the unit any further. There are some slight cosmetic scuffs and scratches around the components. Note that the unit's annual calibration is past due (sticker indicates due 02/2026).
Defects Noted:
Please refer to the photos for more information.
This unit only includes what is photographed in the listing.
Made in USA.
Technical Specs
| Item | Particle Counter |
| Manufacturer Part Number | 9303-01 |
| Coincidence Loss | 10% at 3,400,000 |
| Testing Functions | Air Temperature |
| Number of Channels | 3 |
| Number of Records Stored | 1,500 |
| Particle Size | 0.3 µm, 0.5 µm, 5.0 µm |
| Count Modes | Counts |
| Digital Display Screen Type | LCD with Backlight |
| Maximum Sampling Rate | 1 hr |
| Maximum Temperature Measured | 95 °F |
| Minimum Sampling Rate | 1 sec |
| Minimum Temperature Measured | 41 °F |
| Flow Rate | 0.1 cfm |
| Interface | USB |
| Battery Chemistry | Lithium Ion |
| Display Size | 3.2 in |
| Power Source | Battery |
| Country of Origin | USA |