Choosing a particle counter for environmental indoor air measurement means making a practical call: do you want a fixed monitor, or do you need something portable that can move from room to room? A handheld unit like the Particles Plus 8306 gives you that flexibility, but when it is pre-owned you also need to weigh its operating condition and calibration status.
Quick Verdict
If you want a portable particle counter that is ready to move from room to room and comes with a hard carrying case, AC adapter/charger, and USB cable, the Particles Plus 8306 listed at USD 1,499.00 is a well-equipped used option. The unit has been tested and is fully operational. The main thing to plan for is calibration timing.
Who It Suits
This 8306 is for anyone who wants a handheld counter for indoor air checks, whether you are measuring in office spaces, classrooms, or small commercial rooms. The included hard case and charger make it practical for taking between locations, and the handheld format is easy to carry from room to room.
What Stands Out from the Listed Details
The operational details are useful here: the touchscreen responds normally, the particle counting function is confirmed, the air sampling pump operates properly, and menu navigation and settings functions are confirmed. The calibration information was successfully accessed and verified. The included items-hard carrying case, AC adapter/charger, and USB cable-add practical value and mean you do not have to source those separately.
Meaningful Trade-offs
The biggest trade-off is the calibration due date. The calibration was performed on October 4, 2024, and the listed due date is October 3, 2025; that due date has passed, so the instrument is not currently within its stated calibration window. You will likely need to schedule a recalibration before relying on its readings for formal assessments. The unit is also used, and while its cosmetic condition is described as excellent overall, it is not a new instrument.
Product Note
#### Particles Plus 8306 Handheld Particle Counter Cal. 2024 w/ Case & Accessories
A solid reason to choose this Particles Plus 8306 is its confirmed operational state: the unit has been tested, the particle counting function works, and the air sampling pump operates properly. The limitation to keep in mind is the calibration due date: the stated due date is October 3, 2025, which has passed, so you will need to arrange recalibration after your purchase.
Bottom Line
For environmental indoor air measurement, the Particles Plus 8306 at USD 1,499.00 is a practical handheld choice if you are comfortable managing recalibration. You get a tested unit with useful accessories in a compact form. If your work requires an instrument that is calibrated and within its due date at the moment of arrival, this used unit will not check that box.
