Feature  High temperature area surveillance recorder  Fast WBGT measurements to assess heat stress environment of  Wind speed measurement  Maximum, minimum record  Automatic, manual data memory  Reading lock  Automatic shutdown        Specifications                Measurement items      Radiation ball, dry bulb, wet bulb temperature and wind speed              Measurement computing project      Indoor radiation ball wet bulb (WBGTin), outdoor radiation ball wet bulb (WBGTout), and air-cooled heat index Index              Temperature Measurement      Sensor: NTC              Range: -5 to + 100 (23 to 212 )              Resolution: 0.1 / 0.1              Accuracy: 0.5 / 0.9              Wind speed measurement      Sensor: Platinum resistance heating              Range: 0 to 20m / s              Resolution: 0.1m / s              Accuracy: (4% of reading + 0.1m / s)              Memory Capacity      Manual: 99              Automatic: 65,000 Group              Operating conditions      -5 to 60 (23 to 140 ), 0% RH to 100% RH (non-condensing)              Power supply      A 9V battery or AC power adapter              Battery Life      About 8 hours              Size      221 (H) × 154 (width) × 53 (thickness) mm              Weight      About 1000g              Accessory      Manuals, laptop carrying case, RS-232 cable, CD software, AC power adapter, 10 m sensor cable, 2"Radiation ball, 6"Axis shoot the ball