Food Processing Grain Storage and Drying. -Features and amp; Benefits :Measures airflow volume and velocity ambient and surface temperaturesHot wire sensor at end of telescoping probe can sense even the gentlest breezeJumbo 4-digit LCDMin/Max memory + data holdTime-stamps up to 16000 data points for logging/uploading via RS-232 interfaceSpecifications :Airflow Volume Measurement Range:0 to 1271200 CFM (0 to 36000 CMM)Airflow Velocity Measurement Range:40 to 3940 ft./min (0.2 to 20 m/sec)Airflow Measurement Accuracy: ?5 percentage Ambient Temperature Measurement Range:32? to 122?F (0? to 50?C)Ambient Temperature Measurement Accuracy:?1.5?F (?0.8?C)Surface Temperature Measurement Range(using Type K or J thermocouple):50? to 2372?F (10? to 1300?C)Surface Temperature Measurement Accuracy:?0.2 percentage Dimensions:8 x 3 x 1.5 in. (203 x 76 x 38mm)Power Source:1 ?CR2032? battery (included)4 ?AA? batteries (not included)Includes :Molded hard caseCR2032 battery User?s manual