We recommend that all of our instruments be calibrated at least once annually.  The $250 fee includes cleaning of the entire flow path (inlet, solenoid valve, detection cell, DewLine™ and connecting tubing) with methanol, installation of a new internal ozone scrubber, and calibration to a NIST-traceable standard.  In addition, all instrument components are tested for performance (lamp intensity and precision, flow rate, etc.) and any problems diagnosed.  Be sure to return your instruments for calibration and testing prior to your next field experiment.

Our transfer standard is a Thermo Electron 49i Primary Standard ozone calibrator.  This instrument was calibrated at the National Institute for Standards and Technology (NIST) in Gaithersberg, Maryland on October 21, 2009.  The NIST Calibration Report may be downloaded here:  NIST Calibration Report

Nitric Oxide Monitors™ are calibrated using a NO gas standard from a dynamic dilution system that has been calibrated by an ozone titration using a Model 205 Ozone Monitor™ traceable to NIST via the same Thermo Electron 49i Primary Standard ozone calibrator.  Details of the NIST-traceable calibration procedure are described here:  NO Calibration Procedure