Workstation digital barometer measures atmospheric pressure, graphically displays the barometric trend, and reports temperature and time. Ideal for recording ambient changes in the lab, monitoring conditions affecting sample analysis, and assisting in the prediction of weather changes. Barometer measures pressure from 23.62 to 31.01 inches inHg with a resolution of 0.03 inHg, and from 800 to 1050 millibars with a resolution of 1 mbar. Accuracy is +/-0.4 inHg (+/-12 mbars between 900 to 1050 mbar). Graphic barometric trend shows present reading and previous 1-, 3-, 6-, and 12-hour readings in a bar chart format. Adjustable altitude compensation is from -300 to 1200 meters and -900 to 3600'. Temperature range is 15 to 158 degree F and -9.5 to 70 degree C with a resolution 0.5 degree and an accuracy of +/-1 degree C between 0 and 50 degree C. Clock shows time in AM/PM and 24-hour formats. To assure accuracy an individually serial-numbered Traceable certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Accurate forecasting indicators show weather conditions for the next 12-hours using symbols for sunny, cloudy, rainy, and partly cloudy. Supplied with two AAA alkaline batteries. Measures 4" length by 4" width by 2.25" thick. Weight is 4 ounces.