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PMD 331

The PMD 331 is a portable 7-channel particle counter that accurately monitors particle sizes from 0.3 μm to 10 μm. Its 4-inch TFT display provides real-time readings, while a long-life lithium battery allows up to 8 hours of continuous use. Lightweight and handheld, it’s ideal for rapid on-site monitoring and cleanroom classification. With built-in data storage and USB/RS-485 export options, it ensures convenient and reliable data management.

  • Simultaneous 7-channel particle size monitoring from 0.3 μm to 10 μm.
  • Handheld and lightweight design (<1 kg) for easy on-site use.
  • 2 million data storage with USB and RS-485 export options.
  • Long-life lithium battery enabling up to 8 hours of continuous operation.

Description

The PMD 331 is a handheld 7-channel particle counter designed for precise monitoring of particle sizes from 0.3 μm to 10 μm. Its large 4-inch TFT display shows real-time data clearly, while intuitive controls and quick calibration buttons make operation simple and efficient. Lightweight and portable, it’s ideal for rapid on-site monitoring, single-point data collection, and cleanroom classification from ISO Class 5 to ISO Class 9.

Equipped with a high-capacity lithium battery, the PMD 331 provides up to 8 hours of continuous operation. It features built-in storage for 2 million data sets, with easy export via USB or RS-485. The device’s robust all-metal optical structure ensures strong anti-interference performance, making it reliable for formal classification, monitoring, and compliance with CE, ISO 21501, and JE1190-2008 standards.

Features

  • 7 Channels Particle Size Monitoring Simultaneous monitoring of m, m, m, m, m, m, m, seven channels of particle size data, sampling time from seconds to minute adjustable.
  • Handheld Models The weight of the whole machine is less than , easy to carry. It is very suitable for on-site rapid monitoring, single-point data collection and other scenarios.
  • Strong Anti-interference Adopt all-metal precision optomechanical structure design for anti-interference.
  • Intuitive Operation Large -inch screen, -channel particle size data can be grasped by one key; equipped with independent buttons for quick calibration, setup and export operations.
  • Easy to Export Built-in million groups of data storage capacity, without USB cable can be U disk directly export data; at the same time support RS485 communication interface.
  • High Capacity Battery High-performance lithium battery, hours continuous uninterrupted operation after
  • Certification and Calibration CE, ISO 21501, JE1190-2008 standard (China)

Specifications

 

Model PMD 331 Note
Particle Size Range m, m, m, m, m, m, m Simultaneous Measurement and Display
Accuracy m: ; m: /
Resolution P /L, /TC, /CF,
Flow Rate L/min Accuracy
Principle Light Scattering /
Laser Source Long Life Laser Diode mW, nm /
Sampling Time s s Settable
Demonstrate inch TFT LCD /
Communication Method USB/RS-485 /
Memory data /
Batteries Rechargeable Lithium Battery /
Charging Time h /
Working Temperature $0 sim 50^{circ}$C /
Storage Temperature $-20 sim 60^{circ}$C /
Dimension mm x mm x mm Exclude Inlet & Outlet Terminal
Weight g /
ISO Cleanroom Group ISO Class 5 to ISO Class 9 Suitable for formal classification and monitoring.

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