.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} 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 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. Specifications Particle Channels 0.3µm, 0.5µm, 1.0µm, 3.0µm, 5.0µm, 10.0µm Counting Efficiency 0.3µm ≥ 50%; 0.5µm: 100% Counting Modes Cumulative, Differential Concentration, Differential Counting Sampling Flow 2.83 L/min (±5%), 0.1 CFM Max Sampling Concentration 2,000,000/L Particle Distribution Error ≤ ±30% (0.5µm and 5.0µm) Particle Concentration Error ≤ ±30%FS (0.5µm) Repeatability ≤ 10% Sampling Time 5s to 6h Sampling Points 1000 Sampling Delay 5s to 240s Time Interval 5s to 240s Dew Point Yes Cleanliness Mode Yes Purge Mode Yes Interface USB-Type-C Data Communication Wi-Fi, USB-Type-C WiFi Yes Data Export USB, Wi-Fi Data Storage 10,000 Languages Simplified Chinese, English, French, German, Italian, Spanish, Swedish, Polish, Czech Display Size 3.5in Display Type Color LED Battery 2600 mAh Li-ion Battery Life About 5h Charging Time About 4h Ambient Temperature Range -10 °C to 50 °C Ambient Humidity 0.1 to 99.9%RH non-condensing Storage Temperature -30 °C to 50 °C Weight 710 g Dimensions 290 × 103 × 62 mm Laser Rating CLASS 1 Purge Time ≤ 10min Documentation UT337B Datasheet UT337B User Manual
