The MMD 201A laser dust sensor is a digital particle sensor that can be used to obtain the number and mass of suspended particles in the air per unit volume, that is, the particle concentration. Data output is in digital format. This sensor can be embedded in various instruments or environmental improvement equipment to obtain the instant and accurate concentration data.
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 meters, air purifiers
● Fresh air ventilation system, air conditioner, smart home equipment
● Hospitals, hotels, schools and other public places
● Minimum resolution particle size 0.3 micron
● Zero false alarm
● Real-time response
● High accurate
● Long life time
● Ultra-quiet
| Items | Parameters | U nit |
| Measuring range | 0.3~10 | μm |
| Technical efficiency | 50%@0.3 μm 98%@＞＝ 0.5 μm | |
| Standard volume | 0.1 | L |
PM1.0&PM2.5&PM10 Maximum consistency error | 0 ~ 100μg/m3, ±10μg/m3 101 ~ 1,000μg/m3, ±10% of reading | |
| Response time | ≤10 | S |
| DC supply voltage | 5.0±0.1 | V |
| Ripple | ＜50 | mV |
| Maximum working current | 120 | mA |
| stand-by current | ≤200 | μA |
| Data interface level | L ＜0.8@3.3 H ＞2.7@3.3 | V |
| Working temperature | -10~+50 | ℃ |
| Storage temperature | -30~60 | ℃ |
| Working humidity | 0~99%RH (no condensation) | |
| Average run time without failures | ＞ 40000 (continuous operation) | hr |
| Dimension | 50×35×21 | mm |
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