I. Product Name: LUFTMY Laser Dust PM2.5 Sensor Module

II. Product Model: LD12

The Dust PM2.5 Laser Sensor Module LD12 is a high-precision particulate matter concentration sensor based on Laser Mie Scattering Theory. It can continuously collect and calculate the number of suspended particles of different sizes in the air per unit volume to determine the particulate matter concentration distribution. It can be embedded in various instruments or environmental improvement equipment related to suspended particulate matter concentration in the air, such as smoke alarms, air purifiers, and air conditioners with purification functions, providing timely and accurate concentration data.

III. Application Scope of Dust Sensor Module LD12:

Smoke alarms, air purifiers, fresh air systems, air conditioners with purification functions, PM2.5 detectors, range hoods, specialized PM2.5 sensors, air detectors, wearable devices, etc.

IV. Features of Dust Sensor Module LD12:

1. High measurement accuracy;

2. Real-time response time less than 1 second;

3. Long service life, Mean Time Between Failures (MTBF) ≥ 5 years;

4. Strong anti-interference capability;

5. High consistency;

6. Wide application range, can simultaneously output PM0.3, PM0.5, PM1.0, PM2.5, and PM10.

7. Thin and light design, suitable for detectors, wearable devices, air purifiers, fresh air systems, etc.

V. Technical Specifications of Dust Sensor LD12:

Detection Principle: Mie spherical scattering principle

Dust sensor detection particle size range: 0.1~10μm

PM2.5 Output consistency: >100μg/m³ maximum allowable error ±8%, <100μg/m³ maximum allowable error ±10μg/m³

Dust sensor working conditions: -10~70°C, 0~95% RH

Storage conditions: -40~80°C, 0~95% RH (non-condensing)

Dust sensor working voltage: DC 5.0V±5%

Dust sensor working current: <80mA

Standby current: <0.5mA

Output signal: UART, PWM

Dust sensor dimensions: W42*H35*D23.2 (mm)

VI. Working Principle of Dust Sensor LD12:

Using a laser to irradiate suspended particles in the air produces light scattering. A photoelectric detector collects the scattered light intensity within a certain angular range and linearly converts the resulting scattered light intensity into a voltage, which is then sent to a data processing system. The data processing system processes the data according to a pre-programmed procedure based on Mie scattering theory to determine the equivalent particle size and the number of particles of different sizes per unit volume.