

The Temtop PMD 371 is a high-end handheld device for particle counting/air pollution monitoring, capable of simultaneously measuring the number of particles of 7 different sizes (0.3 µm to 10 µm) and the concentration of various particulate matter (PM1, PM2.5, PM4, PM10, TSP) in a single device. It features a large display, multi-button control interface, large internal memory (8 GB), and supports data transmission via USB or RS-485 (Modbus RTU) for more in-depth data analysis. The device is suitable for applications such as indoor air quality testing, cleanrooms, dust filtration performance testing, environmental research, etc.
| Specification | Value / Details |
|---|---|
| Dimensions | 170 × 110 × 48 mm |
| Weight | Approx. 850 g |
| Battery / Operating Time | Built-in lithium battery; continuous operation up to ~8 hours |
| Storage Capacity | 8 GB internal memory |
| Communication / Data Output | USB & RS-485 (Modbus RTU) |
| Particle Size Channels (Counting) | 7 sizes: 0.3 µm, 0.5 µm, 0.7 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10.0 µm |
| Dust Concentration Measurement | 5 types: PM1, PM2.5, PM4, PM10, TSP |
| Dust Concentration Range | 0 – 9,999.9 µg/m³ |
| Concentration Resolution | 0.1 µg/m³ |
| Accuracy | ±10% (for PM measurements within 0 – 100 µg/m³) |
| Flow Rate | 2.83 L/min (±5% tolerance) |
| Sampling Interval / Duration | Selectable: 1, 2, 5, 10, 15, 30, 60 minutes |
| Particle Count Range | 0 – 3,000,000 particles per cubic foot (CF) |
