SM-PWM-03A -02 infrared dust sensor module adopts the principle of optical scattering, which can detect the change of the concentration of particles in the indoor air with a particle size between 1.0μm and 10μm. The sensor has a built-in infrared light-emitting diode and a photoelectric sensor. The light emitted by the light-emitting diode will produce reflected light when it encounters dust. The photoelectric sensor detects the intensity of the reflected light to reflect the concentration of dust in the air. The sensor can perform PWM signals. The mass density of the communication output dust. (Here is, PWM means Pulse Width Modulation) Here, PWM means Pulse Width Modulation

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Small size and light weight, about 59 (width) × H46 (T) x D18 (D) mm, 23g.

Pulse width modulation (pulse width modulation) output (low pulse output) during 1 second

Can distinguish small particles of cigarette smoke from large particles of dust

The low pulse width is directly proportional to particle size and concentration.

Constant forced air convection flows through the resistance of the heater at the dust sensor.

Heartbeat output without dust signal in clean state.

Lead-free, comply with RoHS standards

The smallest 1um particle can be found

(House dust size: AVG 20um, yellow dust size: AVG 20um, smoke dust particle size: average 1 um)

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