Selectable data sampling rate: 1 to 3600 seconds Manually store/recall up to 99 readings Type K/J Thermocouple input for high temperature measurements Large (9999 count) LCD displays Air Velocity and Temperature simultaneously 2% velocity accuracy via low friction ball bearing vane wheel on 39" (1m) cable Record/Recall MIN, MAX readings Data Hold plus Auto power off with disable function Built-in RS-232 interface The Extech SDL310 Vane Thermo-Anemometer data logger Records data date/time stamps and stores on an SD card in Excel format For easy transfer to a PC for analysis. The SDL310 also can manually store/recall up to 99 readings. Datasheet Specifications Temperature Range Unit: 32 to 122°F (0 to 50°C) Type K Thermocouple: -148 to 2372°F (-100 to 1300°C) Type J Thermocouple: -148 to 2192°F (-100 to 1200°C) Temperature Resolution 0.1° Velocity Range 80 to 4930ft/min (0.4 to 25m/s) Temperature Accuracy Unit: ±1.5ºF (±0.8ºC) Type K Thermocouple: ±(0.4% + 1.8°F/1°C) Type J Thermocouple: ±(0.4% + 1.8°F/1°C) Operating Temp 32 to 122°F (0 to 50°C) Power Supply 6 AA batteries Battery Life N/A Velocity Resolution 1ft/min (0.01m/s) Velocity Accuracy ±2% of reading Additional Information Plastic Measure Vane Pressure Range N/A Pressure Accuracy N/A Output N/A Time Constant 1 to 3600 seconds (user selectable) Relative Humidity Range N/A Relative Humidity Accuracy N/A Relative Humidity Resolution N/A Volumetric Flow Range N/A Volumetric Flow Accuracy N/A Volumetric Flow Resolution N/A