Digi-Sense, 68000-48, Traceable Digital Handheld Environmental Monitor with Stopwatch and Calibration, NIST CertificateFeatures with all optional accessories:All-in-one barometer, altimeter, thermometer, stopwatch, compass and clockGet accurate, reliable measurements with included NIST-traceable calibrationEasily view current barometric pressure measurements and trends in bar-graph format for the past 2 to 12 hoursObtain altitude measurements from -2296 to 29520 feet (-700 to 9000 meters) - minimum/maximum readings are automatically storedTemperature is updated every minuteStopwatch counts up or down from 1 second to 24 hoursClock displays the time of day in 12- or 24-hour format along with the date, month and day of the weekCompass feature shows real-time direction in whole circle and compass bearingIncludes:lanyardtwo CR2032 batteriesNIST-traceable calibration certificate with dataThe Digi-Sense environmental meter has a rugged and compact housing to transport easily in a backpack or pocket and includes a lanyard for neck wear. The rugged shock-resistant case is ideal for lab or outdoor use. Readings are updated every 15 minutes for barometric pressure, 2 seconds for altitude and 1 minute for temperature. All current measurements are displayed simultaneously, as well as an arrow to show where north is in correlation to the user current position, temperature trends and the weather forecast. Traceable products are calibrated to NIST-traceable standards and ready to use as soon as you receive it. Each product goes through an intense vetting process before it can carry the Traceable name and it includes NIST-traceable certification. This means that a 17025-accredited calibration test lab has confirmed that the product meets or exceeds all stated specifications, saving you both time and money by not having to calibrate separately. NIST-traceable calibration also helps you meet quality standards and regulatory compliance for ISO, FDA, cGMP, VFC, CAP, CLIA and Joint Commission requirements.