

The Temtop PMS 21 is a high-precision remote particle counter designed for integration into professional air monitoring systems. It supports simultaneous measurement of seven particle sizes (0.3 µm / 0.5 µm / 0.7 µm / 1.0 µm / 2.5 µm / 5.0 µm / 10.0 µm), includes an integrated suction pump for air sampling, and features RS-485/Modbus RTU communication for easy integration into a central monitoring system. The device is used in high-end air quality control applications, cleanrooms, HVAC systems, and industrial measurement.
| Specification | Value / Details |
|---|---|
| Particle Size Channels | 7 sizes: 0.3 µm, 0.5 µm, 0.7 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10.0 µm |
| Flow Rate | 2.83 L/min (±5%) |
| Vacuum Source / Pump | Built-in suction pump |
| Communication / Data Interface | RS-485 (Modbus RTU) |
| Operating Power Supply | DC 12 ~ 24 V |
| Average Current Consumption | ~800 mA |
| Operating Temperature | 0 ~ 50 °C |
| Storage Temperature | –20 ~ 60 °C |
| Laser Source Lifetime | Industrial-grade laser, long lifespan (~20,000 hours) |
| Calibration Standards | Calibrated according to ISO 21501 and JJF1190-2008 |
| Mechanical Structure | Robust metal housing with high electromagnetic interference resistance |
| Display / Interface | TFT display (shows sampling time, configuration, and status) |
