KANOMAX 3432 Light-Scattering Digital Dust Monitor | 0.001–10.000 mg/m³, semiconductor laser, automatic calibration, 1.1 kg

KANOMAX 3432 Light-Scattering Digital Dust Monitor: 0.001–10.000 mg/m³

Overview

The 3432 is a light-scattering digital dust monitor from Kanomax (Japan). It draws in air containing airborne dust, irradiates it with a laser, measures the scattered light intensity with a photodiode and accumulates it as a count value (CPM), which is converted to relative mass concentration using the K value (mass concentration conversion factor). Automatic calibration is built in; background and sensitivity adjustment each take approx. 6 seconds. The manufacturer's catalog states that it is suitable for air environment measurements under Japan's Act on Maintenance of Sanitation in Buildings and the School Health and Safety Act, among others. The 3432-A additionally provides analog, pulse and alarm outputs and must be specified when purchasing the main unit.

Key Specifications

• Measuring range: 0.001–10.000 mg/m³ (1 CPM = 0.001 mg/m³)
• Accuracy: ±(10% of reading + 1) count (standard particles)
• Measurement modes: Standard mode 6 s, 10 s, 30 s, 1, 2, 3, 5, 10 min; free setting 1–59 s or 1–99 min; manual mode
• Light source and method: Semiconductor laser diode; light scattering method
• Display: Backlit graphic LCD: count value, remaining time bar graph, battery, K value
• K value setting: 0.1–9.9 (0.1 steps)
• Outputs (3432-A): Analog 0–1 V (0–1,000 or 0–10,000 CPM), pulse, alarm (photocoupler output)
• Power: 6 AA batteries (manganese, alkaline, Ni-MH); 24 h or more continuous with backlight off
• Dimensions and weight: 162 × 60 × 102 mm; 1.1 kg (excluding batteries)

Applications

• Air environment measurement in buildings and offices.
• Inspection of airborne dust concentration in workplaces.

Specifications per the KANOMAX 3432 catalog E3432-8J (2022-08 edition) (retrieved 2026-10-23).