The MMD202 laser dust sensor is a digital particle sensor that can be used to measure the number and mass of suspended particles in the air per unit volume, that is, the particle concentration (μg/m3), and output it in the an digital form. This sensor can be embedded in various instruments or environmental equipment provide accurate and instant particle measurement information.
This sensor uses the principle of laser scattering, that is, the laser is irradiated on the suspended particles in the air to produce scattering, and the scattered light is collected at a specific angle to obtain a curve of the scattered light intensity signal. Then the microprocessor uses an algorithm based on the Mie (MIE) theory to obtain the equivalent particle size of the particles and the number of particles of different sizes per unit volume.
● Air quality monitoring equipment, portable instruments, air purifiers
● Fresh air ventilation system, air conditioning, smart home equipment
● Hospitals, hotels, schools and other public places
● Full shielding design, stronger anti-interference ability, air inlet and outlet on the same side, customers do not need to design air duct
● Minimum resolution particle size 0.3 microns
● Ultra-thin, ultra-quiet
● Zero false alarm
● Real-time response
● Accurate data
● Long life time
| Items | Parameters | Unit |
| particle size range | 0.3~10 | μm |
| Output results | Particle mass concentration | μg/m3 |
| Measuring range | PM1.0: 0 ~ 1,000 PM2.5: 0 ~ 1,000 PM100 ~ 1,000 | μg/m3 |
| Resolution | 1 | μg/m3 |
| Maximum consistency error for PM1.0&PM2.5&PM10 | 0 ~ 100, ±10 101 ~ 1,000, ±10% of reading | μg/m3 |
| Response time | ≤10 | S |
| Working temperature | -10~50 | ℃ |
| Working humidity | 0~99%RH (no condensation) | % |
| Storage temperature | -30~60 | ℃ |
| Power supply | DC 5V±0.1V, ripple <50mV | V |
| Working current | ≤100 | mA |
| Stand-by current | ≤200 | μA |
| Digital output 1 (default) | I2C, UART_TTL (L<0.8V@3.3V;H>2.7V@3.3V) | |
| Digital output 2 | DAC (can be customized) | |
| Digital output 3 | PWM (can be customized) | |
| Output method | The default is passive output after power-on, and the sampling time interval requires more than 1000ms. | |
| Mean time between failures under normal temperature and pressure | ＞ 40000 (continuous operation) | hr |
| Reference Size | 48×37×12 | mm |
USD