Product Overview

HPD05 PM2.5 Sensor Module use principle of optical scattering to measure concentration of dust inthe air,the module built in a Infrared Transmitter and a high sensitive Photoelectric Receiving Sensor the Infrared Transmitter emits light and the light meets the dust to produce the scotch light, theintensity of the scotch light detected by Photoelectric Receiving Sensor reflects the concentration ofdust in the air, HPD05 have two ways to output current concentration data, one is PWM signal (thewidth of signal is the value, 1ms = 1ug/m3), the other is IIC signal(unit is ug/m3).

HPD05 can be used for Air Cleaner, Air Conditioner with purifying function, Fresh Air System and air quality testing equipment.

Detecting Principle

Per the principle of optical scattering,the Transmitter emits light, and the light meets the dust to produce the scotch light, the high sensitive Photoelectric Receiving Sensor detects the intensity of the scotch light then output intensity signal, current which is proportional to the size and quality of intensity of the scotch light, the current is amplified by amplifier and calibrated by CPU, finally output digital PWM signal or IIC data of concentration of dust.

7. Notes

(1). HPD05 use the Joule heating of resistor, produce updrafts in the inner part of the casing, so the sensor module installation keep vertical with an error of less than plus or minus 3 degrees. The sensor inlet is facing downward and the outlet is facing upwards.( Note: with heating resistance for the air inlet, position at the lower end; to ensure the flow of the air inlet and outlet)

(2). If updrafts inside of the casing chaos, it affects the feature of HPD05, please consider the airflow around the sensor.

(3). HPD05 is installed inside of the device, the front window need to be fitted with a black sponge(Close to the sensor the front window surface can not be gum), to ensure that it is in the dark environment, reduce the influence of interference light.

(4)．HPD05 do not use in the environment of organic gases and flammable gases.

(5)．Clean the surface of the lens please do not use organic agent and detergent. And please not to bruise the lens surface, avoid the hard object of scoop. The surface of the lens can be cleaned with a cotton swab dipped in clean water, and then dry with a cotton swab. Do not use alcohol.

(6)．The power supply voltage fluctuation must be controlled below 50mV.

(7). This product contains conductive material because of its rubber shell, In order to use safety, it is recommended to use isolated power supply, and non isolated power supply needs to be well protected.