SX-L301T Handheld Particle Counter

Short Description:

The Sothis SX-L301T Handheld Airborne Particle Counter measures 0.3 to 10.0 μm with a flow rate of 0.1 CFM (2.83 LPM).

Easy to configure, this instrument displays up to 6 user-selectable size channels as well as temperature and relative humidity. View data and generate ISO 14644-1, CGMP or 209E reports on screen or via printer, real time through its versatile output options . The Sothis Handheld Particle Counter has a mass concentration mode that approximates density in μg/m³.

Product Detail

Product Tags

Sothis Handheld Particle Counter (Model SX-L301T) set the standard of instrumentation in cleanroom / operating room monitoring and verification, filter testing, IAQ investigation, data center cleaning and many more highly specialized and highly sensitive applications. These beautifully engineered devices boast some of the most highly advanced technology in the industry. A combination of accuracy and practicality, these devices count airborne particles with high quality performance.

Since their inception, Sothis Handheld Air Particle Counters have been the trusted choice in measuring instruments of by an ever-growing group of leaders in pharmaceutical, semiconductor, food and beverage industries. The model SX-L301T perform with reliability and accuracy as predecessors, but now have features that make them easier to use and that can gather measurements significantly faster. They have very large, full color 4.3 inch LCD touchscreens, which can actually display data graphically for speedy interpretation. Despite the fact that measurements can very easily be taken directly from the instrument, these new models also include the easiest options for transferring data to PCs and other devices. 


Product Property

1. 2.83L/min (0.1cfm) flow rate.
2. Both AC and DC can be available.
3. Touch screen operation control.
4. The six particle size channels are displayed on the same screen, showing the particle concentration.


1. Clean room (area) cleanliness test.
2. Daily maintenance and monitoring of clean room in electronic factory and pharmaceutical factory.
3. Measurement of high concentration aerosol (need to use SX-D100 particle diluter).
4. Measurement of suspended particles in air.

Technical Datasheet SX-L301T



Sampling flow

2.83L/min ±5%0.1CFM

Repeatability relative error


Particle size channel

0.3μm, 0.5μm, 1μm, 

3μm, 5μm, 10μm

Particle size distribution error


Laser source

Laser diode

Maximum sampling concentration


Air pump

Imported air pump works continuously and stably.

clean-down capability

10minThe count per minute was zero three times in 10 minutes

Verification standard

JJF1190-2008GB/T 6167-2007

Sampling time

User defined1~14400s

Sampling delay

User defind1~255s

Counting mode


Sampling spot



7-inch colored touched screen

Sampling times (location)


Printing way

Built-in Thermal Printer

Working time

It can be used continuously for 6 hours under the condition of full charge

Power supply

AC 220V  50Hz

Data storage

1 ~ 5000 sets of measurement data which can be stored and exported

lithium battery

DC 14.8V  6.6Ah

Battery charging time


Weightbattery included


Data communication interface


Standard accessories

Sampling port rubber sleeve, isokinetic sampling head, self-cleaning filter, tripod, printing paper, portable protection box, charging adapter, black hose (inner diameter of 10 mm), operation manual, original calibration report and certificate.

Operation environment

Degree 0~40℃,humidity 10~70%RH




aluminium alloy

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