Kanomax Model 3443 Laser Scattering Dust Monitor

Overview

The Kanomax Model 3443 Laser Scattering Dust Monitor is a portable, high-sensitivity particulate matter (PM) measurement instrument engineered for real-time, quantitative assessment of airborne dust concentration in occupational and environmental settings. It operates on the principle of laser light scattering—where a collimated diode laser beam interacts with suspended particles in an isokinetic sampling stream, generating scattered light intensity proportional to particle surface area and concentration. The instrument is calibrated traceably to ISO 7708 and aligned with the health-based PM₁₀ reference method defined in WHO Air Quality Guidelines and China’s GB/T 20965–2007 (equivalent to EN 12341). Its optical design incorporates a low-noise photodetector array and temperature-compensated signal processing to ensure stable response across variable ambient conditions (10–40 °C, ≤90% RH non-condensing). Unlike beta attenuation or gravimetric methods, the Model 3443 delivers second-by-second concentration readouts without consumables or filter handling—making it suitable for continuous monitoring, source identification, and short-term exposure assessments.

Key Features

• Real-time PM concentration output with simultaneous display of instantaneous value, running average, minimum, and maximum over user-defined intervals
• Integrated rechargeable lithium-ion battery enabling up to 8 hours of continuous operation; supports hot-swappable battery exchange during field use
• Compact ergonomic housing (162 × 60 × 109 mm) with IP54-rated enclosure for resistance to dust ingress and incidental water splashing
• Dual-range analog voltage output (0–1 V) configurable for either 0–1000 CPM or 0–10,000 CPM scaling—compatible with industrial data loggers and SCADA systems
• USB 2.0 interface compliant with CDC ACM class for plug-and-play connectivity to Windows/macOS/Linux hosts without proprietary drivers
• On-device data logging capacity of 100,000 timestamped records (including date/time, concentration, battery level, and pump status)

Sample Compatibility & Compliance

The Model 3443 is validated for aerosol measurements in indoor air, workplace environments, construction sites, and cleanroom support zones. It responds to solid and liquid aerosols within the aerodynamic diameter range of 0.1–10 µm—including mineral dusts (e.g., silica, limestone), metal fumes, organic powders, and combustion-derived soot—with consistent Mie scattering behavior above 0.3 µm and empirically corrected sensitivity down to 0.1 µm. Calibration is performed using NIST-traceable PSL (polystyrene latex) spheres and verified against gravimetric reference samplers per ISO 8502-12 and JIS B 7990. The device meets CE marking requirements under the EU EMC Directive 2014/30/EU and RoHS 2011/65/EU. While not certified for regulatory compliance reporting under US EPA PM₁₀ Method EQPM-0607-182, it satisfies preliminary screening and engineering control verification per OSHA Technical Manual Section III: Chapter 2 and ACGIH TLV® documentation protocols.

Software & Data Management

Kanomax provides free desktop software (Kanomax Data Viewer v3.2+) for post-processing logged data, generating time-series plots, exporting CSV/Excel reports, and applying user-defined averaging windows (1-min to 24-hr). The software supports audit trail functionality including operator ID entry, calibration event logging, and modification timestamps—enabling alignment with GLP documentation practices. Raw USB data streams are accessible via ASCII protocol for integration into custom Python/Matlab scripts or LabVIEW-based monitoring platforms. All firmware updates are delivered through signed binary packages with SHA-256 hash verification to ensure integrity.

Applications

• Occupational hygiene surveys for compliance with national permissible exposure limits (PELs) and ACGIH TLVs®
• Verification of local exhaust ventilation (LEV) system performance during commissioning and routine maintenance
• Indoor air quality (IAQ) baseline studies in hospitals, schools, and office buildings
• Real-time feedback during abrasive blasting, grinding, or powder handling operations
• Supporting ISO 14644-1 classified cleanroom monitoring as a supplementary tool for non-viable particle trend analysis
• Field validation of computational fluid dynamics (CFD) dispersion models in industrial facilities

FAQ

Does the Model 3443 require annual recalibration?
Yes. Kanomax recommends annual factory recalibration using reference aerosols and flow verification per ISO/IEC 17025-accredited procedures. Field zero checks using clean air filters should be performed before each measurement session.
Can it measure PM_2.5 separately from PM₁₀?
No. The Model 3443 reports total mass concentration across its 0.1–10 µm detection range. It does not incorporate size-selective inlets or multi-channel optical discrimination required for segregated PM_2.5/PM₁₀ reporting.
Is the USB interface compatible with modern macOS versions?
Yes. The device enumerates as a standard CDC ACM serial device and is natively supported on macOS 12 Monterey and later without additional kernel extensions.
What is the typical uncertainty at 0.01 mg/m³?
At concentrations ≥0.01 mg/m³, expanded uncertainty (k=2) is ±15% relative to NIST-traceable reference measurements under controlled laboratory conditions, per Kanomax Technical Note TN-3443-02.
Does it meet FDA 21 CFR Part 11 requirements for electronic records?
The instrument itself does not implement electronic signature or audit trail controls. However, when used with validated Kanomax Data Viewer configurations and documented SOPs, it may support Part 11-compliant workflows in pharmaceutical manufacturing environments.