Designed specifically for semiconductor cleanroom monitoring, process benchmarking and particle troubleshooting applications. With industry-leading ISO 21501 accuracy and reproducibility, the MET ONE 3411 is the cleanest 0.1um portable air particle counter when compared to equivalent models from competitors. Unlike many particle counters, the MET ONE 3411 fan remains off when operating in a standard semiconductor cleanroom environment, virtually eliminating particle generation.


Platform APC Instruments
Channels/Standard Sizes 6 channels (0.1 µm, 0.2 µm, 0.3 µm, 0.5 µm, 1 µm, 5 µm)
Light Source Helium neon laser
Flow Rate 1.0 CFM (28.3 LPM)
Zero Count ISO 21501-4 & JIS B 9921 (1 count or less in 5 minutes; 95% Upper Confidence Limit)
Coincidence Loss % at 1,765,000 particles/m3 (per ISO 21501-4 method)
Industry Standards ISO 21501-4 , CE
Counting Efficiency 50% at 0.1 μm (100% for particles > 0.15 μm per ISO 21501-4 & JIS B 9921)
Count Alarms, Display & Cycles User-defined alarm counts, Raw counts: N/CF, N/CM, N/L in cumulative or differential mode
Data Storage 5000 samples
Interfaces & Protocols RS232, RS485, 802.11 b/g Wireless, 802.3 Ethernet, USB Client (v1.1) & USB Host (v1.1) interfaces, Protocol: Modbus TCP, Modbus RUT, Serial FX
Display Color 1/4 VGA TFT touch screen
Power Requirements 24 VDC, 3.2 A with 100-240 VAC, 50/60 Hz adapter (included in ship kit)
Temperature Range Operating temperature range: 10°C to 40°C, Storage temperature range: -40°C to 50°C
Environmental Conditions Safe for indoor use only
Humidity Restrictions 10%-90% relative humidity (non-condensing)
Pump Type Air vacuum, rated for continuous use
Battery Lithium ion smart battery (rechargeable, ejectable & hot-swappable)
Battery Operating Time 3 hours (minimum)
Battery Recharge Time 6.75 hours (minimum) - 10 hours (maximum)
Label Locations 0-999 (appears on printout)
Operating System Windows® CE
Color Silver
Weight 15.9 kg (without battery)
Width 33 cm / 13 in
Depth 56 cm / 22 in
Height 23 cm / 9.1 in
Additional Information Languages: English, French, German, Italian, Spanish, Korean, Japanese, Chinese.


The listed regulatory status for products correspond to one of the below:
IVD: In Vitro Diagnostic Products. These products are labeled "For In Vitro Diagnostic Use."
ASR: Analyte Specific Reagents. These reagents are labeled "Analyte Specific Reagents. Analytical and performance characteristics are not established."
CE: Products intended for in vitro diagnostic use and conforming to European Directive (98/79/EC). (Note: Devices may be CE marked to other directives than (98/79/EC)
RUO: Research Use Only. These products are labeled "For Research Use Only. Not for use in diagnostic procedures."
LUO: Laboratory Use Only. These products are labeled "For Laboratory Use Only."
No Regulatory Status: Non-Medical Device or non-regulated articles. Not for use in diagnostic or therapeutic procedures.