650nm 5mW Red Laser Module for Dust Detection PM2.5 Sensor

The 650nm 5mW Red Laser Module—a dedicated low-power light source engineered for PM2.5 dust detection sensors. Optimized for light scattering-based particle measurement, this module delivers ultra-stable output, eye-safe operation, and compact integration, making it ideal for air quality monitors, air purifiers, and environmental sensing equipment.

Core Advantages for PM2.5 Dust Detection

650nm Red Wavelength: Optimized for Light Scattering Principle

650nm wavelength matches the optimal scattering response of fine particles (0.3–2.5μm diameter); generates clear, distinguishable scattered light signals for PM2.5 concentration calculation. Outperforms shorter wavelengths in anti-interference capability (resists ambient light noise) and longer wavelengths in detection precision for submicron particles.

5mW Low Power: Stable & Low-Consumption Operation

CW mode output with ≤±0.5% power fluctuation over 24 hours ensures consistent particle sensing accuracy, avoiding signal saturation caused by high-power lasers. Ultra-low power consumption (≤0.025W) supports battery-powered sensor designs, extending device runtime by 30% compared to higher-power alternatives.

Eye-Safe Design: Hassle-Free Integration

Complies with IEC 60825-1 Class 1 laser safety standards—no additional protective measures required for human contact, perfectly suited for consumer-grade air quality monitors and portable sensing devices.

Key Applications

Primary Application: 

PM2.5/PM10 dust detection sensors for air quality monitors, smart home air purifiers, and indoor environmental monitoring systems.

Extended Applications:

• Portable air quality detectors (outdoor/industrial use)

• Automotive in-cabin air quality monitoring modules

• HVAC system dust concentration sensors

• Industrial workshop particulate matter monitoring devices