Sampling method of built-in sampling pump, a sampling tube is about 1.2 meters in length, suitable for remote or inaccessible space sampling Display 3 LED digital display Alarm sound and light alarm, low / high 2 alarm dots, can be set by the user Low voltage indicating continuous acousto-optic prompt Fault indicator continuous voice prompts, "ACTIVE" lights The working temperature of the ambient temperature -20 ℃ -+50 ℃; storage temperature of -20 ℃ -+60 ℃ The humidity of the environment 0-99%RH, discontinuous gel Shell aluminum shell Size 181.1 x 85.9 x 101.6 (mm) 1.14kg weight (including battery) The standard configuration of the host, a sampling tube, alkaline battery, 110VAC adapter / charger, manuals, calibration certificates, portable bag Optional accessories nickel cadmium rechargeable battery, 110/220VAC converter