PX-375

Continuous Particulate Monitor with X-ray Fluorescence

Continuous elemental and particulate mass analysis with automatic sampling

There has been a growing concern regarding particulate matter (PM) pollution and its effects on health. For effective preventative measures, the determination of source PM concentration is extremely important. Therefore, indication of PM and elemental concentrations is critical. The PX-375 analyzer employs automatic sampling, continuous on-line PM quantitative and qualitative analysis for rapid air pollution measurements.

Segment: Process And Environmental

Division: Ambient

Manufacturing Company: HORIBA, Ltd.

Continuous analysis of PM mass and the elemental concentration by a single unit directly in the field.
Adoption of world proven technologies: X-ray fluorescence & Beta-ray attenuation.
HORIBA's originally developed filter tape provides excellent sensitivity and precise performance.
Installed CMOS camera enables observation of collected particulate sample on the filter.
User friendly display and operations

<Table 1> Detectable Elements

The specifications, appearance or other aspects of products are subject to change without notice. Please contact us if you prefer the demo to consider the purchase of this product.

<Table 2> Lowest Detection Limit (Example) (σ) (ng/m³)

* LDL (σ) is half of the LDL (2σ)
* There may be variations in the LDL due to differences between devices.
* Please consult us regarding the LDL of elements not listed in the table above.

Measurement of Black Particles

• The PX-375 can be optionally upgraded with black particle (BP)*¹ monitoring function for easy and cost-effective monitoring of black and dark brown color particles in aerosol or flue gas (e.g. carbon, black nickel, black chromium etc.)
• Fully automated sampling with continuous measurement of 3 different parameters: particulate mass concentration, element concentration, and black particle value by a single unit
• Monitoring is performed by HORIBA patented*² technology utilizing camera image processing algorithms for quantifying the brightness of particulate
matter deposited on the filter tape
• BP indicates elemental carbon (EC) value, based on conversion factors*³ from BP to EC installed by default into the analyzer
• This conversion factors can be adjusted based on customer's standard method
• Easy sensitivity check and calibration of LED and camera by utilizing the neutral density filter

_{*1 Black particle (BP) is HORIBA's original dimensionless parameter, which expresses the brightness of the reflection from sample collected on the filter tape.
*2 Patented (Japanese Patent No. 7246871, US Patent No. US 10876950, Chinese Patent No. ZL 2018 1 0769558.4)
*3 Conversion factor equation is created by utilizing the measurement data of ambient air PM2.5 particulate matter samples analyzed by the Thermal Optical Reflectance method. The conversion factor can be reset by the user based on their samples and reference method.}

Related Industries

Related Applications

Chemical Speciation of Particulate Matter from Steel and Refining Plants

Related Articles (List of research papers utilizing PX-375)

Takuma Miyakawa, Akinori Ito, Chunmao Zhu, Atsushi Shimizu, Erika Matsumoto, Yusuke Mizuno, Yugo Kanaya, Atmospheric Chemistry and Physics, European Geosciences Union (2023), Trace elements in PM_2.5 aerosols in East Asian outflow in the spring of 2018: emission, transport, and source apportionment
Xiaoyang Yang, Yuanguan Gao, Qingbo Li, Jun He, Yu Liu, Kuiquan Duan, Xiaojuan Xu, Dongsheng Ji, Chinese Research Academy of Environmental Sciences (2023), Maritime and coastal observations of ambient PM_2.5 and its elemental compositions in the Bohai Bay of China during spring and summer: Levels, spatial distribution and source apportionment
Brenda Lopez, Xiaoliang Wang, Lung-Wen Antony Chen, Tianyi Ma, David Mendez-Jimenez, Ling Cui Cobb, Chas Frederickson, Ting Fang, Brian Hwang, Manabu Shiraiwa, Minhan Park, Kihong Park, Qi Yao, Seungju Yoon, Heejung Jung, University of California, Riverside (2023), Metal contents and size distributions of brake and tire wear particles dispersed in the near-road environment
Ito, A., and Miyakawa, T. (2023), Aerosol iron from metal production as a secondary source of bioaccessible iron. Environmental Science & Technology, 57(10), 4091-4100
Zhu, C., Miyakawa, T., Irie, H., Choi, Y., Taketani, F., and Kanaya, Y. (2021), Light-absorption properties of brown carbon aerosols in the Asian outflow: Implications of a combination of filter and ground remote-sensing observations at Fukue Island, Japan. Science of The Total Environment, 797, 149155
Naoki Kaneyasu, Shigeyuki Ishidoya,Yukio Terao,Yusuke Mizuno,and Hirofumi Sugawara, Advanced Industrial Science and Technology (AIST)(2020), Estimation of PM_2.5 Emission Sources in the Tokyo Metropolitan Area by Simultaneous Measurements of Particle Elements and Oxidative Ratio in Air
Kunio T., Motonobu Takahashi, Kenji Takeda, Kazuya Tsurumi HORIBA, Ltd., Yasuyuki Kiya, Shota Tobe, Akira Ogura SUBARU CORPORATION (2019), Studies on Characteristics of Nanoparticles Generated in a Gasoline Direct-Injection Engine
Jessie M. Creamean, Paul J. Neiman, Timothy Coleman, Christoph J. Senff, Guillaume Kirgis, Raul J. Alvarez, Atsushi Yamamoto, Atmospheric Chemistry and Physics, European Geosciences Union (2016), Colorado air quality impacted by long-range-transported aerosol: a set of case studies during the 2015 Pacific Northwest fires

Product name	Continuous Particulate Monitor with X-ray Fluorescence
Model	PX-375
Measured object	Particulate matter (PM₁₀, PM_2.5, TSP)
Measurement content	Particulate mass concentration and element concentration

Common

Flow rate	16.7 L/min
Sampling pump	Linear drive system, externally installed
Filter tape	None-woven PTFE fabric filter
Spot tape interval	20 / 25 / 50 / 100mm selectable
Filter tape replacement interval	Approx. 5 months (In case of 20 mm spot interval, 1 hour sampling time)
Ambient operation temperature	10˚C~30˚C
Relative humidity	0~80% RH noncondensing
Altitude	1000m or less
Power supply	AC100V~240V ±10%, 50/60Hz±1%
Power consumption	Approx. 400VA
External dimension	430mm(W)×550mm(D)×285mm(H) (without sampling pipe and measurement head)
Weight	Approx. 49kg
Data output	CSV file (Average PM mass and elemental concentration)
External connection	Ethernet^TM, USB, RS-232C* (option)

*Please consult about communication and instrument composition separately.

Mass analyzer unit

Measurement method	Beta-ray attenuation
PM₁₀	US EPA Louvered PM₁₀ Inlet
PM_2.5	BGI VSCC^TM Cyclone
TSP	TSP Inlet
Measurement range	0~200 / 500 / 1000 μg/m³
Repeatability	±2% (against reference foil value)
Span drift	±3 % (24h)
Lowest detection limit (2σ)	±4 μg/m³ (24h)
Sampling and measurement cycle	0.5 / 1 / 2 / 3 / 4 / 6 / 8 / 12 / 24 hours

Element analyzer unit

Measurement method	Energy dispersive X-ray fluorescence spectrometry
Detectable elements	See Table 1 "Detectable Elements". 32 standard parameters: Al, Si, S, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Zr, Pb, Ga, Ge, Y, Pd, Ag, In, Sn, Sb, Te, Cs, Ce, Bi
Primary X-ray filter	Automatic switching for light metals/heavy metals
Tube voltage	Automatic switching for 15kV/50kV
Detector	SDD (Silicon Drift Detector)
Sample image	CMOS camera
Lowest detection limit (2σ)	See Table 2 "Lowest Detection Limit (Example)"
Measurement range	depends on measurement time
Analysis time	100 / 200 / 500 / 1000 / 2000 / 5000 / 10000s selectable
Calibration material for X-ray intensity for standard parameter	NIST SRM 2783, other materials (option)
Safety functions for X-ray	Internal lock system Key switch X-ray indication light

Black Particles

Measurement method	Energy dispersive X-ray fluorescence spectrometry
Measured object	Particulate matter of black color
Detector	CMOS camera
Light source	LED
BP measurement range	0-200
Lowest Detection Limit	<5 BP value
Span drift	BP value: ±2% (24 h)
Spot tape interval	25 mm only
Sampling cycle	Follow the setting of mass and element measurement
Repeatability	±2% of full scale (Typical), ±3% of full scale (Max)
Calibration material	Neutral density filter

PX-375