Brand CEM Air Particle Counter, Particle Counter Type Air, Model NameNumber CEM DT-9881

Particle counterchannels0. 3, 0. 5, 1. 0, 2. 5, 5. 0, 10umflow rate0. 1ft3 2. 83l/min counting efficiency50% @ 0. 3 m, 100 % for particles > 0. 45 mcoincidence loss5% at 2, 000, 000 particles per ft3data storage5000 sample records micro, Sd card count modescumulative, Differential, Concentration, Air temperature and relative humidity measurementair temperature range0 c maximum of 50 degrees C 32 f to 122 f dew, Point temperature range0 c to 50 c 32 f to 122 f relative humidity range0 to 100%rhair temperature accuracy 0. 5 c 0. 9 f 10 c maximum of 40°C 1. 0 c 1. 8 f othersdew, Point temp. Accuracy 0. 5 c 0. 9 f 10 c to 40 c 1. 0 c 1. 8 f othersrelative humidity accuracy 3%rh 40% to 60% 3. 5%rh 20% to 40% and 60% to 80% 5%rh 0% to 20% and 80% to 100%operating temperature0 c to 50 c 32 f to122 f storage temperature, 10 c to 60 c 14 f up to 140 degrees Fahrenheit relative humidity10 to 90%rh non, Condensing powerbatteryrechargeable batterybattery lifeabout 4 hours continuous usebattery charge timeabout 2 hours with ac adapter