This symposium presents the results of recent European research on the accuracy of low-velocity measurements by several thermal aremometers indoors, including the impact of directional sensitivity of the velocity sensor, dynamic response of the anemometer, natural convection from the sensor, and air temperature fluctuations. New test methods and requirements for low-velocity measurements and instruments also are discussed.

1. Test Method for Describing Directional Sensitivity of Anemometers for Low-Velocity Measurements Indoors

Toni Stannov, P.E., Dantec Measurement Technology, Skovlunde, Denmark, Arsen Krikor Melikov, Ph.D., P.E., Member, Technical University of Denmark, Lyngby, Denmark, Zbigniew Popiolek, Ph.D., P.E., Silesian Technical University of Gliwice, Gliwice, Poland, and Finn E. Jorgensen, P.E., DANTEC Measurement Technology, Skovlunde, Denmark

2. New Method for Testing Dynamic Characteristics of Low-Velocity Thermal Anemometers

Arsen Krikor Melikov, Ph.D., P.E., Member, Technical University of Denmark, Lyngby, Denmark, Zbigniew Popiolek, Ph.D., P.E., Silesian Technical University of Gliwice, Gliwice, Poland, and Finn E. Jorgensen, P.E., DANTEC Measurement Technology, Skovlunde, Denmark

3. Impact of Natural Convection on the Accuracy of Low-Velocity Measurements by Thermal Anemometers with Omnidirectional Sensor

Zbigniew Popiolek, Ph.D., P.E., Silesian Technical University of Gliwice, Gliwice, Poland; Arsen Krikor Melikov, Ph.D., P.E., Member, Technical University of Denmark, Lyngby, Denmark; Finn E. Jorgensen, P.E., DANTEC Measurement Technology, Skovlunde, Denmark; and Wolfgang Finkelstein, P.E., Member, and Thomas Sefker, Ph.D., P.E., Gebruder Trox GmbH, Heinrich-Trox-Platz, Neukirchen-Vluyn, Germany

4. Impact of Velocity and Temperature Fluctuations on the Accuracy of Low-Velocity Measurements Indoors by Thermal Anemometers

Arsen Krikor Melikov, Ph.D., P.E., Gunnar Langkilde, P.E., and Thomas Lund Madsen, P.E., Fellow, Technical University of Denmark, Lyngby, Denmark

5. Requirements and Guidelines for Low-Velocity Measurements

Arsen Krikor Melikov, Ph.D., P.E., Member, Technical University of Denmark, Lyngby, Denmark, Zbigniew Popiolek, Ph.D., P.E., Silesian Technical University of Gliwice, Gliwice, Poland, Wolfgang Finkelstein, P.E., Member, Gebruder Trox GmbH, Neukirchen-Vluyn, Germany, Thomas Sefker, Ph.D., P.E., Gebruder Trox, Neukirchen-Vluyn, Germany, and Isabelle Care, Ph.D., P.E., CETIAT, Villeurbanne Cedex, France

• measurement: anemometer, low air velocity in room