air quality monitor
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Air Quality Detector PN: RK208D Operating Instruction

Product Overview Cooling hole

Power button 1. Power button 2. Toggle key : hold it down for 3 seconds to turn on or off the product; : Each press can switch to a different interface to view different display data; 3. Display: Display the concentrations of PM2.5, TVOC, CO2, HCHO, temperature and humidity, RF, battery level, alarm on/off reminder, date, time, and other real-time detection data; 4. Air cooling hole: exchange the air to be tested, and ensure that it is unblocked when the product is operating; 5. USB port: USB charging; and 6. Press the power button, toggle key and RF button simultaneously for 5 seconds. The...

Product Parameters 3.1 Product dimension Overall dimension of the main unit: 110 * 50 * 80 mm 3.2 Product weight Weight of the main unit: 225 g

3.3 Power supply parameters Input voltage: 5 V ± 0.2 V Battery capacity: 2,600 mAh Power: 7.5 W Charging current: 1 A Working duration: 8h Cooling hole Collection hole Cooling hole

3.4 Measurement indicator and range Sensor Parameters Type Measuring range Measurement accuracy Note: If the product is placed in an environment beyond the measuring range for a long period of time (e.g. placing a cigarette in its air inlet for a long period of time), it may cause measurement errors. 3.5 Environmental conditions Operating environment: 5-45 °C Storage environment

Operating Principles of Product The multi-functional air quality detector can detect PM2.5, CO2, TVOC, HCHO, temperature, humidity and other data. For the detection of PM2.5, a digital universal PM concentration sensor based on the principle of laser scattering is available to continuously collect and calculate the count of suspended particulate matters (i.e. PM concentration distribution) with different particle sizes in the unit volume of air. The collection of CO2 data is based on the NDIR infrared measurement principle. The detection of HCHO is based on the electrochemical principle....

Initial use: 1. Upon receipt of this product for the first time, place it in a place with good air quality (e.g. outdoor, balcony, window). Insert the power plug and start this product for ventilation for 24h; 2. Place the product in a place with good air for more than 10min after each start, and calibrate the detector; During use: 1. Once the product is turned on or restarted, the detection of HCHO, TVOC, and CO2 needs 3 minutes to warm-up. 2. Place the product in a good environment. Do not read any data until the data is stable. Then the measurement is completed; 3. Detect multiple points...

Chapter VIII Pollution Comparison Table Concentration Comparison Table Environmental Quality Recommended Applications This product is suitable for the purification effect test of indoor air purifier, vehicle air purifier and fresh air system. It can be used indoors and outdoors.

Multi-point detection The air compositions in the air are not necessarily uniform. For example, there will be differences in the pollutant load in every corner of a room. Therefore, the user is advised to conduct multi-point sampling in the detection process and calculate the final average value for reference. Avoidance of interferences In the detection process, please try to avoid the interferences of alcohol gases, such as cigarette, alcohol, perfume, cosmetics, skin care products (hand oil), so as not to cause measurement errors. Before detection, ventilation can be carried out to...

Please keep the product dry. Rain, moisture and various liquids may corrode its electronic circuits and cause product damage; Do not disassemble the internal devices or casing; Do not subject the product to severe impact or vibration; Do not seal the product; Do not use the product in an environment with heavy oil or fumes; otherwise, its service life will be affected; and Please keep the air inlet of this product unobstructed. Chapter XII Customer Service and Warranty Terms Three guaranteed services (i.e. repair, replacement, return) are available in accordance with national regulations:...