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Particulate Matter PM2.5 Monitor For Air Purifier Used In Indoor

Tongdy Sensing Technology Corporation
Tongdy Sensing Technology Corporation
City: Beijing
Province/State: Beijing
Country/Region: China
Tel: 86-10-59738930
Contact Person:
Mr Michael Zhang

Particulate Matter PM2.5 Monitor For Air Purifier Used In Indoor

Brand Name : Tongdy
Model Number : G03-PM2.5
Certification : CE/ISO9001
Place of Origin : CHINA
MOQ : No limit
Price : Based on order quantity
Payment Terms : T/T or Paypal
Supply Ability : 10000pcs per month
Delivery Time : Based on order quantity
Packaging Details : Cartons
Product name : Particulate Matter PM2.5 Monitor
Display : 6-color backlight LCD
Output : Modbus
Application : HAVC system, Ventilation, Air purifier
Gross Weight : 280G
Mounting Type : Wall mount or desktop type
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General Data
Power supply

G03-PM2.5-300P: 5VDC with a 110V/230V America power adaptor
G03-PM2.5-340P: 24VAC/VDC power supply

Work consumption1.2W
Warm-up time60s (first use or use again after a long-time power off)
Monitor parametersPM2.5, temperature, relative humidity
LCD display

LCD six backlit, displays six levels of PM2.5 concentrations and one hour moving average value.
Green: Top Quality- Grade I
Yellow: Good Quality-Grade II
Orange: Mild level pollution -Grade III
Red: Medium level pollution Grade IV
Purple: Seriously level pollution Grade V
Maroon: Severe pollution - Grade VI


G03-PM2.5-300P: Desktop
G03-PM2.5-340P: Wall mounting

Storage condition0℃~60℃/ 5~95%RH
Housing materialsPC/ABS materials
Net weight198g
IP classIP30

Temperature and Humidity Parameters
Temperature humidity sensorBuilt-in high precision digital integrated temperature humidity sensor
Temperature measuring range-20℃~50℃
Relative humidity measuring range0~100%RH
Display resolutionTemperature:0.01℃ Humidity:0.01%RH
AccuracyTemperature:<±0.5℃@25℃ Humidity:<±3.0%RH (20%~80%RH)
StabilityTemperature:<0.04℃ per year Humidity:<0.5%RH per year

PM2.5 Parameters
Built-in sensorDust particle sensor
Sensor TypeOptical sensing with an IR LED and a photo-sensor
Measuring range0~600μg∕m3
Display resolution0.1μg∕m3
Measuring accuracy(1h average)±10µg+10% of reading @ 15℃~35℃, 20%~80%RH
Working life>5 years (avoid to close lampblack, dust, great light)
Stability<10% measurement decline in five years

RS485 interfaceModbus protocol, 38400bpsbaud rate


  • G03-PM2.5-300P: PM10 Monitor with temperature & RH, 6 colors backlit LCD.
  • G03-PM2.5-340P: PM10 Monitor with temperature & RH, 6 colors backlit LCD. Modbus RS485 interface.


  • Built in professional duct sensor with optical IR LED sensing method. Real time monitor indoor PM2.5 concentration.
  • Built in high accuracy temperature & RH sensor, monitor indoor air temperature & RH.
  • Using our unique technology of compensating method, and up to nine calibration points, to guarantee G03-PM2.5 measurements accuracy in different environments.
  • LCD displays the real time measurement and moving average value of PM2, as well as real time temperature and RH measurements.
  • Special design six backlit LCD for six levels of PM2.5, in straight and clear read.
  • long-term security power supply: 5VDC with a power adaptor
  • Option: RS485 interface with Modbus protocol
  • Users can know very well the indoor PM2.5 concentration, and can easily select a air purifier/air cleaner. Not only see a visible effective of indoor air clean but also have a reasonable use of an air cleaning device.

LCD backlit indicate PM2.5 concentration

Air Quality LevelsPM2.5 24h Average ConcentrationEffects on Health


Air Typeμg/m3
GreenLevel IVery good0-35Good air quality, almost no air pollution
YellowLevel IIGood36-75Acceptable air quality, but some pollutants may has a weak effect on health of a handful of high sensitive people.
OrangeLevel IIILight pollution76-115The symptom of susceptible people are mild sharpened and healthy people come on an symptom of irritation.
RedLevel IVmedium pollution116-150Further aggravate symptoms of vulnerable groups, it may has an impact on healthy people heart, lungs and respiratory system.
PurpleLevel Vheavy pollution151-250Symptoms of vulnerable groups are further aggravated. Healthy people generally appear symptoms
Red-brownLevel VISerious pollution>251The exercise tolerance of healthy people is reduced with noticeable symptoms, and some symptoms appear ahead of time.

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