Traceable Model 4198 Meteorological instrument

Barometer,altimeter,thermometer,stopwatch and chronograph all in the palm of your hand! Handheld digital barometer measures altitude,temperature and air pressure.Also has a stopwatch/chronograph and graphically displays barometric pressure trends.Traceable to NIST to ensure accuracy.Our ISO calibration laboratory is A2LA accredited and provides individually numbered traceability certificate.It represents traceability to standards provided by NIST (National Institute of Standards and Technology).Barometer measures atmospheric pressure from 15.90 to 31.01 inches of mercury (inHg) with a resolution of 0.03 inHg and 400 to 1070 millibars (mbar) with a resolution of 1 mbar.Test point accuracy is ±0.2363 inHg (±8 mbar).Barometric pressure trend displays current reading and previous 2,4,6,8,10 and 12 hours as a bar graph.Barometric pressure readings are updated every 15 minutes.Altimeter measures altitude from -500 to 7000 meters (-1640 to feet) with a resolution of 1 meter or 1 foot.Height is displayed in meters or feet.Readings are updated every 2 seconds.Features min/max memory of altitude reached over any time period,altitude trend showing current reading and previous 2,4,6,8,10 and 12 hours in bar graph format.Thermometer display range is -40.0 to 158.0°F and -40.0 to 70.0°C with 0.1° resolution.Accuracy is ±1°C.Temperature display updates every 10 seconds.Stopwatch and Clock Stopwatch times events from 1 second to 99 hours,59 minutes and 59 seconds.Resolution 1 second,accuracy 0.01%.Clock shows time from day to minute and shows date and month.The clock also has 12-\/24-hour timekeeping and alarm clock formats.Rugged shockproof case,compact size (4 x 2-1/2 x 3/4 inches),and light weight (3-2/3 ounces) make it the perfect portable device.Comes with lanyard,2 batteries and instructions.Replacement battery category.No. 1005..