Dr. Christopher Meyer has been a member of the NIST Thermometry Group since 1991. During this time he has been involved in projects involving both thermometry and hygrometry and has developed expertise in both areas. He has authored more than 45 papers on these subjects. Meyer constructed the NIST Low Temperature Realization Facility, which realizes the ITS-90 temperature scale from 0.65 K to 85 K and serves as NIST's primary temperature standard below 25 K. More recently, he participated in the development of the NIST Hybrid Humidity Generator, which serves as NIST's primary humidity standard over the dew/frost point range -70 °C to 85 °C. Meyer has also been involved in numerous research projects in thermometry and hygrometry, including thermodynamic temperature measurement using acoustic thermometry, temperature measurement of silicon wafers for Rapid Thermal Processing (RTP), microscopic temperature measurement using fluorescence techniques, and primary humidity measurement using a gravimetric hygrometer. He is an active member of CCT Working Group 3 on Temperature Scale Uncertainties and ASTM Committee E20 on Temperature Measurement.