Barometer is ideal for recording ambient changes in the lab, monitoring conditions affecting samples analysis, and assisting in the prediction of weather changes. Workstation measures atmospheric pressure, displays temperature and time, and displays barometric trend graphically. The graphic barometric trend shows the current reading as well as the previous 1-, 3-, 6-, and 12-hour readings in a bar chart format. Forecasting indicators show weather conditions for the next 12 hours using symbols for sunny, cloudy, rainy, and partly cloudy. Clock shows time in a.m./p.m. or 24-hour format. A serial numbered certificate is provided from an ISO 17025 calibration laboratory accredited by A2LA to indicate instrument traceablilty to standards provided by the National Institute of Standards and Technology. Barometric Pressure Range: 800-1050 mbar (23.62-31.01 in. Hg), selectable Barometric Resolution: 1 mbar (0.03 in. Hg) Barometric Accuracy: +-12 mbar (+-0.4 in. Hg) from 900 to 1050 mbar Temperature Range: -9.5 to 70 degrees C (15 to 158 degrees F) Temperature Resolution: 0.5 degrees Temperature Accuracy: +-1 degrees C (0 to 50 degrees C) Altitude Compensation: -300 to 1200 m (-900 to 3600 ft.) Dimensions: 10.2W x 5.7D x 10.2H cm (4 x 21/4 x 4") Weight: 113.4 g (4 oz.) Ordering Information: Supplied with two AAA batteries.