Product Name: air particle counter features> date and time display;> USB high-speed communication interface;> built-in the COM serial printer interface;> count limit alarm: the instrument can be set to 10, 100, 1000, 10000, 100000 6 size channels, one million six levels (corresponding to ISO 4-9) count limit alarm;> data memory can store 255 sets of measurement results;> Built-in sensors to measure temperature, humidity and record stores;> Simultaneous measurement of 0.3, 0.5, 0.7 micrometers, 1.0, 2.0μm, 5.0μm, of 10.0 particles;> Test Range: 10 ~ 300 000 (corresponding to ISO 4-9); repeatability: relative standard deviation of ≤ 20%;> particle size accuracy: the relative error ≤ 35%;> Source: The laser diode as the light source of the sensor; flow: 2.83 l / min (0.1cfm) (error ≤ ± 5%);> Maximum sampling time: 59 minutes and 59 seconds; purification time: ≤ 20min;> Counting mode: the cumulative counting mode, differential counting mode, the concentration counting mode;> Display: LCD 240 × 160, Chinese interface, easy to operate;> Power: Ni-MH battery (6.0V/3300mAH) or AC adapter (Input: 180 ~ 240V, Output: 9V/1000mA);> Battery working time: continuous testing time is about 4 hours (Ni-MH battery); Weight: approx. 950g (including battery);> Working Temperature: 5 to 40 ° C Relative humidity: ≤ 75%;> Standard accessories: AC adapter, self-cleaning filter, dynamic sampling head, suitcases;> Options: printer (with cable) external temperature and humidity sensor; function:> date and time display> USB high-speed communication interface can be used to obtain data and computer communications, analysis, software upgrades USB remote control communication interface, the interface is used to obtain data and computer communications, analysis and remote operation> COM built-in serial printer interface: connected to a serial printer> count limit alarm: The instrument can be set to four (ten), 5 (one hundred), 6 (1000), 7 (ten thousand a), 8 (one hundred thousand), 9 (one million) six levels count limit alarm data memory can store 255 sets of measurement results> Chinese interface, simple operation> Built-in sensors to measure temperature, humidity and record storage> Auto Power Off