PCCY-DQ air samplers Product Description: 
 We at EPA "finds that the technical requirements for environmental protection product 24 hours continuous ambient air temperature auto-sampler," the latest standards, set ten years of development experience and user feedback to develop the TH-3000B Ⅳ portable AC and DC constant air sampler. The instrument is small, light weight, easy to operate, widely used for environmental protection departments at all levels of environmental impact assessment. Main features: Four gas samples simultaneously. MCU control, semiconductor refrigeration, heating, air pump, orifice design into an integrated structure. Dual temperature, dual semiconductor cooling or heating, the temperature control to improve the accuracy and power, therefore, especially suitable for high temperature, high humidity and cold regions. Can be sampled many times the standard volume and time accumulate, useful in a variety of air sampling tests. Can automatically measure ambient atmospheric pressure and temperature, the volume of the sample standard state conversion in real time. Imported high vacuum micro-pump as the driving force, pumping power and stability, long life, low noise. Instrument has a brown-out protection to ensure data security and reliability. First throttle flow sensor for atmospheric pressure continuous sampling can accurately measure the sample flow. The main technical indicators traffic flow range: 0.18 ~ 0.22L/min 0.1 ~ 1.0L/min Accuracy: ± 1 ℃. When the voltage fluctuations in the 220 ± 22V, load resistance changes in the 4.5 ± 0.5kPa, the flow fluctuation is less than ± 3% constant speed of response: ≤ ± 3% Temperature range: 12 ~ 30 ℃; Temperature Accuracy: ± 1 ℃ / 24h Temperature display range: 0 ~ 50 ℃ Accuracy: ± 1 ℃ time error: ± 1 ‰ / 24h sampling time: 0 to 99 hours adjustable sampling interval: adjustable from 0 to 99 hours Dimensions and weight equipment : 31cm × 24cm × 22cm 6.5kg Noise: ≤ 65dB