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
What particle sizes does the UT337B count?
Six channels: 0.3, 0.5, 1.0, 3.0, 5.0, and 10.0 µm.
Can it classify cleanrooms?
Yes — it classifies cleanliness to ISO and EU-GMP standards directly from the particle count.
Does it measure environmental conditions?
Yes — temperature, humidity, and dew point alongside the particle count.
⚠️ WARNING (California Proposition 65): This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
