The MMD 201 laser dust sensor is a particle sensor that can be used to detect suspended particle concentration in the air per unit volume. The output is in digital format. This sensor can be embedded in various instruments or environmental related equipment to obtain the concentration of suspended particles in the air and provide instant accurate concentration data.
This sensor uses a laser scattering technology, that is, the laser is irradiated on the suspended particles in the air to cause scattering, and the scattered light is collected at a specific angle to obtain the curve of the scattered light intensity changing with time. After the microprocessor data collection, it uses MIE-based theoretical algorithm to obtain the equivalent particle size of particles and the number of particles of different sizes in 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
● Instant response
● Accurate data
● Long life time
● Silence
| Items | Parameters | Unit |
| Measuring range | 0.3~10 | μm |
| Count accuracy | 50%@0.3 μm 98%@＞＝ 0.5 μm | |
| Quasi volume | 0.1 | L |
PM1.0&PM2.5&PM10 Maximum consistency error | 0 ~ 100, ±10 101 ~ 1,000 ±10% of reading | μg/m3 |
| Response time | ≤10 | S |
| DC supply voltage | 5.0±0.1 | V |
| Ripple | ＜50 | mV |
| Maximum operating current | 120 | mA |
| Stand-by current | ≤200 | μA |
| Data voltage level | Low ＜0.8@3.3; High ＞2.7@3.3 | V |
| Working temperature | -10 ~ +50 | ℃ |
| Storage temperature | -30 ~ 60 | ℃ |
| Working humidity | 0~99%RH (no condensation) | |
| Average no failure time | ＞ 40000 (continuous operation) | hr |
| Maximum size | 50×35×21 | mm |
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