Overview

The UT337B is a six-channel laser particle counter for cleanroom and air-quality work. It counts airborne particles at 0.3, 0.5, 1.0, 3.0, 5.0, and 10.0 µm and classifies cleanliness to ISO and EU-GMP standards, with simultaneous temperature, humidity, and dew-point readings — the full picture for qualifying a controlled environment.

A 2.83 L/min (0.1 CFM) sampling flow, cumulative and differential counting modes, 10,000-record storage, and Wi-Fi and USB-C transfer cover routine monitoring and audits. A color display and rechargeable Li-ion pack make it practical for walkthroughs. It's backed by UNI-T's nearly 40 years of test-meter manufacturing.

Key Features

• Six channels: 0.3, 0.5, 1.0, 3.0, 5.0, 10.0 µm
• ISO and EU-GMP cleanroom cleanliness classification
• Temperature, humidity, and dew-point monitoring
• 2.83 L/min (0.1 CFM) sampling flow
• Cumulative, differential-concentration, and differential-counting modes
• 10,000-record storage; data export by USB-C and Wi-Fi
• 3.5 in color display; Class 1 laser
• Rechargeable 2600 mAh Li-ion; ~5 h battery life

UT337B Details

Six-Channel Particle Counting

Counting at six sizes from 0.3 µm to 10 µm resolves where contamination sits across the particle-size spectrum, so you can tell fine sub-micron loading from larger debris — essential for diagnosing a controlled environment, not just passing or failing it.

Cleanroom Classification

Built-in ISO and EU-GMP cleanliness modes classify the space directly from the count, with cumulative and differential modes for both standards-based reporting and investigation.

Environment & Sampling

Simultaneous temperature, humidity, and dew-point readings add the environmental context behind a particle result, and a 2.83 L/min (0.1 CFM) sampling flow follows the standard cleanroom sampling rate.

Data & Field Use

Storage for 10,000 records with USB-C and Wi-Fi export supports audit trails and reporting, while a 3.5 in color display and a rechargeable pack with ~5 h of life suit walkthrough monitoring.

Applications

Pharmaceutical and semiconductor cleanroom qualification and monitoring; hospital and laboratory air-quality checks; HVAC and filtration verification; and contamination investigation in controlled manufacturing.

Frequently Asked Questions

Warranty

This product includes a standard 1-year warranty covering manufacturing defects and component failures under normal use conditions.

UNI-T stands behind every product we sell. If you experience any issues within the warranty period, our US-based support team is here to help with troubleshooting, repair, or replacement.