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Temtop PMS 21

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.

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Specifications

SpecificationValue / Details
Particle Size Channels7 sizes: 0.3 µm, 0.5 µm, 0.7 µm, 1.0 µm, 2.5 µm, 5.0 µm, 10.0 µm
Flow Rate2.83 L/min (±5%)
Vacuum Source / PumpBuilt-in suction pump
Communication / Data InterfaceRS-485 (Modbus RTU)
Operating Power SupplyDC 12 ~ 24 V
Average Current Consumption~800 mA
Operating Temperature0 ~ 50 °C
Storage Temperature–20 ~ 60 °C
Laser Source LifetimeIndustrial-grade laser, long lifespan (~20,000 hours)
Calibration StandardsCalibrated according to ISO 21501 and JJF1190-2008
Mechanical StructureRobust metal housing with high electromagnetic interference resistance
Display / InterfaceTFT display (shows sampling time, configuration, and status)

Outstanding Features

  • Supports 7-channel particle counting for more detailed assessment of airborne dust particle size distribution.
  • Integrated suction pump allows direct air sample suction without the need for external suction equipment.
  • RS-485/Modbus RTU communication facilitates easy integration into monitoring or central control systems (SCADA, BMS).
  • The metal housing design provides anti-interference protection and a robust structure, suitable for various industrial or harsh environments.
  • The long lifespan of the laser light source (~20,000 hours) allows for long-term operation with low maintenance requirements.
  • Calibration according to international standards such as ISO 21501 and JJF1190-2008 ensures high reliability and data comparability.

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