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 ambient and occupational air quality assessment. It operates on the principle of laser light scattering—where a collimated 650 nm semiconductor laser beam interacts with airborne particles in the sampling chamber, generating scattered light intensity proportional to particle concentration and size distribution within the 0.1–10 µm range. This optical detection method enables rapid, non-destructive quantification of total suspended particulates (TSP), PM₁₀, and respirable fractions without filter collection or gravimetric analysis. Designed in compliance with Japanese Ministry of Health, Labour and Welfare (MHLW) guidelines for PM₁₀ monitoring and aligned with international reference methods such as ISO 7708:1995 (Air quality — Particle size fraction definitions for health-related sampling), the Model 3443 delivers field-deployable performance suitable for indoor air quality (IAQ) surveys, workplace exposure evaluation, and environmental compliance screening.

Key Features

• Laser-based optical sensing system with stable 650 nm diode source and optimized photodetector geometry for consistent signal-to-noise ratio across low- and mid-concentration ranges
• Real-time display of instantaneous concentration, maximum/minimum values, and time-weighted average over user-defined intervals
• Integrated rechargeable lithium-ion battery supporting continuous operation for up to 8 hours; compact ergonomic housing (162 × 60 × 109 mm) and lightweight design (~1.3 kg) for extended handheld use
• Dual-range analog output (0–1 V corresponding to either 0–1000 or 0–10,000 counts per minute) compatible with industrial data loggers and SCADA systems
• USB interface enabling direct connection to Windows-based PCs for firmware updates, configuration management, and bulk data export in CSV format
• Onboard memory capable of storing 100,000 timestamped measurement records with internal clock synchronization and automatic overflow handling

Sample Compatibility & Compliance

The Model 3443 is calibrated using polydisperse latex sphere (PSL) aerosols traceable to NIST standards and validated against gravimetric reference samplers under controlled wind tunnel conditions. It is intended for use in non-explosive atmospheres (non-intrinsically safe, non-explosion-proof classification) and complies with IEC 61000-4 electromagnetic compatibility requirements. While not certified for regulatory-grade enforcement measurements under EPA Method PS-1 or EN 12341, its performance characteristics meet the technical criteria specified in JIS Z 8901:2019 (Testing dusts) and MHLW Notification No. 123 (2002) for PM₁₀ monitoring in occupational hygiene applications. Routine calibration verification is recommended every six months using certified zero air and challenge aerosol sources.

Software & Data Management

Kanomax provides proprietary PC software (compatible with Windows 10/11, 64-bit) that supports device configuration, real-time data streaming, historical record review, statistical summary generation (e.g., 8-hr TWA, STEL), and customizable report templates. All stored datasets include metadata such as date/time stamp, measurement mode, battery level, and ambient temperature (via integrated thermistor). Audit trails are maintained for parameter changes and data export actions, supporting GLP-aligned documentation practices. The software does not implement FDA 21 CFR Part 11 electronic signature functionality but allows manual annotation and PDF export for laboratory notebook integration.

Applications

• Occupational health and safety assessments in manufacturing, construction, mining, and pharmaceutical cleanroom support areas
• Indoor air quality baseline studies and HVAC system performance verification in office buildings, schools, and hospitals
• Field validation of local exhaust ventilation (LEV) effectiveness and dust suppression measures
• Educational demonstrations and undergraduate laboratory experiments in environmental engineering and industrial hygiene curricula
• Pre-commissioning air testing during facility upgrades or renovation projects where rapid qualitative PM trending is required

FAQ

What particle size range does the Model 3443 measure?
It detects airborne particles from 0.1 µm to 10 µm in aerodynamic diameter, with optimal sensitivity in the 0.3–5 µm range typical of respirable and thoracic fractions.
Is the instrument suitable for outdoor ambient air monitoring?
While technically operable outdoors, its lack of weatherproofing (IP rating not specified), absence of heated inlet, and susceptibility to humidity-induced scattering artifacts limit its use to sheltered or indoor environments per manufacturer guidance.
Can the Model 3443 distinguish between PM_2.5 and PM₁₀ mass concentrations?
No—it reports total mass concentration across the full 0.1–10 µm range. It does not perform size-selective fractionation; dedicated impactor-coupled instruments or beta attenuation monitors are required for regulatory PM_2.5/PM₁₀ separation.
Does the device require annual recalibration by an accredited lab?
Kanomax recommends functional verification every 6 months using zero air and PSL challenge aerosols; full traceable recalibration at an ISO/IEC 17025-accredited facility is optional but advised for QA/QC programs requiring documented metrological traceability.
Is the USB interface compatible with macOS or Linux operating systems?
Official driver and software support is limited to Windows platforms; generic CDC ACM serial emulation may allow basic data readout on other OSes, but Kanomax does not validate or guarantee functionality outside Windows.