Indoor PM2.5 Sensor

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PAS-IN-01 is an optically designed industrial-grade, digital laser sensor to measure particulate matter. It comes with a built-in laser and photoelectric receiving module. Different than its contemporaries, PAS-IN-01 is calibrated for PM10 and PM2.5 separately. It works on the principle of 90° light scattering. The light that strikes the aperture of the mirror within the range of 90° is reflected towards the sensor. The photodiode registers pulse for as long as the light is reflected. The electrical signal thus received is converted into concentration of particulate matter by specific algorithms.

The indoor PM2.5 sensor has been created with finesse and precision, and finds its applications in:

  • Air Purifiers
  • Indoor Air Quality Monitors
  • HVAC Ventilation Systems
  • Automobile and Aeronautical Industries
  • Aviation Instruments
  • Research laboratories


The sensor comes packed with the cutting-edge technology of optical light scattering technique to measure PM2.5 concentration.

The characteristic features of indoor PM2.5 sensor include :-

  • Compact: The sensor’s ultra-slim package enables it to get lodged in any kind of device or instrument.
  • Durable: The sensor comes with an expected life of up to 10 years. It is maintenance-free, thus avoiding problems related to sensor drift or malfunction.
  • Reliable: Laser-based scattering principle and Advanced algorithms for precise and reliable measurements.
  • Highly Responsive: The average response time of this indoor PM2.5 sensor is 15 seconds making it robust and fast.
  • Automated Feedback Mechanism : Fan with an in-built closed loop control to stabilize air flow and optimization of operational life of the sensor.
  • Accurate: High-resolution particle sizing to broaden the range of applicability pertaining to specific particle size.
  • Water Resistant: Moisture-proof design to reduce the probability of error in optical measurements due to humidity
  • Energy Efficient
  • Individually Calibrated

Technical Specifications

Parameter Values
Dimensions 4.5 x 4.5 x 2 cm
Rated voltage 5V
Rated current 70mA
Communication Port Level 3.3 V
Working Temperature -20~70 C°
Storage Temperature -20~85 C°
Working Humidity 0~99C%RH (No condensation)
Particle Size Resolution 0.3 um
Effective range of PM2.5 mass concentration 0-1500 ug/m3
Effective range of PM10 mass concentration 0-2000 ug/m3
Mass concentration data resolution 1 ug/m3
Consistency of PM2.5 mass concentration +10% or +10 ug, whichever is greater
Consistency of PM10 mass concentration +15% or +15 ug, whichever is greater
Mean Time between failures >30,000 hours




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