* Real time data recorder, save the data into the SD memory card and can be down load to the Excel, extra software is no need. * 0.2 - 25.0 m/s, high precision for low air velocity measurement. * m/s, ft/min, km/h, knots, mile/h,oC/oF. * Type K Thermometer : -100 to 1300 oC, oC/oF. * Type J Thermometer : -100 to 1200 oC, oC/oF. * Data hold, Record (Max., Min.). * RS232/USB computer interface. * Patented. * Patent: Taiwan, China, Japan, Germany, USA pending.