Digi-Sense, EW-98767-11, Traceable Hot Wire Anemometer with Rs -232 Output and Calibration, NIST CertificateFeatures with all optional accessories:Extend the remote probe from 9-1/2 inches to 3 feetGet accurate, reliable measurements with included NIST-traceable calibrationEliminate friction errors caused by vane anemometersConnect to a PC to monitor and store readingsObtain measurements from hard-to-reach places - probe extends to 3 feet (0.9 m)EW-98767-11 Includes Only:anemometertelescoping probe with 40-inch cablesix AAA batteriessensor covercomputer outputNIST-traceable calibration certificate with data This hot wire anemometer measures both temperature and air velocity with two miniature glass -bead thermistors for greater precision - even at low air speeds. No moving parts means friction errors are eliminated - ideal for cleanrooms and environmental tests. Air speed can be displayed in five different units of measure: ft/min, m/s, km/hr, mph and knots. Switch between °F and °C at the flip of a switch. Recall Min/Max temperatures and velocities, or freeze the display with the HOLD feature. Rs -232 output allows for data acquisition to monitor and store readings on your PC. Data acquisition software is not included. 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.