Feature:1. Accurate Detection: This air quality detector uses the laser scattering principle to accurately measure the number and mass of different particle sizes of laser dust per unit volume in the air.2. Diverse Function: This air quality tester has a compact design with many functions, high testing accuracy, speed, portability and ease of use.3. Real Time Result: The air quality tester can measure the number of dust particles in 6 particle sizes at the same time in one sampling, and the results can be recorded in real time, which is very convenient for studying, testing and evaluating various clean environments.4. ABS Housing: The housing of the air quality detector is made of ABS material, which has outstanding cold resistance, abrasion resistant, toughness, etc.5. Wide Application: The air detector can be widely used in microelectronics, medical and pharmaceutical, biochemical products, food hygiene, cosmetic products, accuracy machinery, fine chemicals and other sectors.Specification:Item Type: Air Quality MonitorMaterial: ABSParticle Detection Range: 0.3m to 10mParticle Size: 0.3m, 0.5m, 1.0m, 3.0m, 5.0m, 10mCounting Efficiency: 50% at 0.3m, 100% at >0.5m (in accordance with ISO 21501 4 and JIS)Particle Size Resolution: <15% at 0.5m (in accordance with ISO21501 4)Sampling Flow Rate: 2.83L/min (0.1ft)Tolerance: 5% (2,000,000Particles/ft)Battery: Built in lithium ion battery 1 x 3.7V 2000mAh (Included)Operating Temperature: 0Cd to 50COperating Humidity: 10%RH to 90%RH No frost condensationStorage Temperature: -20C to 60CStorage Humidity: 0 to 95%RH no frost condensation .Package List:1 xAir Quality Monitor1 x USB Cable1 x Instruction Manual1 x Storage BoxNote:1. It is forbidden to extract gases containing oil or corrosive substances, or to measure a mixture of gases that may produce a reaction (e.g. hydrogen and oxygen). These gases may also produce an explosion in the counter.2It should be used in a clean environment in order to prevent damage to the laser sensor.3. It is forbidden to disassemble the instrument or to throw it into fire.4. Prevent the instrument from violent vibrations and drops.5. Do not allow liquids to flow inside the instrument.6. When the machine enters a different ambient temperature, especially when the low temperature environment enters a high temperature environment, water vapour may condense on the instrument and the machine must be allowed to stabilise for half an hour before powering on to measure the values. Water, solutions or other liquids should not be allowed to enter through the sampling air inlet.