When you're setting up an environmental indoor air measurement routine, the first decision isn't which brand to buy. It's which type of instrument matches your actual needs. Do you want a new, compact monitor that tracks the most common particle sizes plus temperature and humidity, or are you looking for a used test meter kit from GrayWolf Sensing Solutions?
The Air Quality Monitor with PM0.3/2.5/10 detection is sold as a new unit. The GrayWolf PC-3000 Series PC-3500 Environmental Air Quality Test Meter Monitor Kit comes as a used kit. The price gap between them is wide, and so is the gap in what each option promises.
Quick verdict
If you want a new device for everyday indoor checks, the PM0.3/2.5/10 monitor combines particle readings, temperature, and humidity in one unit, and it stores 999 measurements in a trend log. It's the lower-priced way to get started.
If you need a used environmental air quality test kit from GrayWolf Sensing Solutions, the PC-3500 powers up and comes with the accessories shown in the photos. Its unknown usage history is the main thing to weigh.
At a glance
| Product | Listed price | Condition | What stands out |
|---|---|---|---|
| Air Quality Monitor PM0.3/2.5/10 | $159.99 | New | Laser particle counter for three size ranges, with temp/humidity and trend chart |
| GrayWolf PC-3000 Series PC-3500 Kit | $1,966.44 | Used | Environmental test kit from GrayWolf Sensing Solutions, comes as pictured |
Where each product wins
The Air Quality Monitor wins on price, condition, and combined measurements. It's new, it tracks three particle size channels, temperature, and humidity, and it stores 999 timestamped readings with a trend chart. For a home or small office, this is a straightforward way to monitor indoor air.
The GrayWolf PC-3500 is the pick if you specifically want a kit from GrayWolf Sensing Solutions. The product name identifies it as a unit from that manufacturer, which matters if you're already building a set of instruments from that company. It's a monitor kit rather than a single device, so you're getting a package that includes the accessories shown. The trade-off is that it's used and arrives exactly as pictured, without any other accessories.
Product notes
Air Quality Monitor, PM0.3/2.5/10 Dust Particle Counter, High Sensitivity 3-Chan
This monitor uses laser scattering to report real-time concentrations of PM0.3, PM2.5, and PM10, with an accuracy of ±12μg/m³. It also measures temperature (-10-60°C) and humidity (0-100%), giving you a fuller picture of the room from one device. The 999-data-set log with trend chart is helpful for health logs or tracking how air quality changes over time, and the adjustable audible alarm alerts you when readings cross a threshold. The trade-off is the fixed three-channel particle detection; you get those specific sizes and not others. At $159.99, it's a new, self-contained monitor that fits easily on a shelf or desk.
GrayWolf PC-3000 Series PC-3500 Environmental Air Quality Test Meter Monitor Kit
This is a used GrayWolf Sensing Solutions kit, acquired from a state surplus sale. It powers up, and the prior usage history is unknown. You'll receive the device and accessories shown in the photos, with no other accessories included. The kit comes with a 30-day return warranty for US buyers, which is useful given the used condition. If you need a GrayWolf instrument for environmental air quality testing and you're comfortable with a used unit that may show cosmetic wear, this kit is the one to consider. Just go in with clear expectations about the condition.
Final choice by use case
Choose the Air Quality Monitor if you want a new, affordable device for home or office environmental indoor air measurement and you only need the three particle size channels it provides. It's also the better pick if you want temperature and humidity in the same unit.
Choose the GrayWolf PC-3500 if you need a used kit from GrayWolf Sensing Solutions and you can accept an unknown usage history with the exact accessories shown in the listing.
