The 25-page 2001-2002 product catalog is a comprehensive compilation of instruments used by HVAC contractors, facility personnel, building engineers, safety officers, and industrial hygienists. The catalog is divided into five sections: air volume instruments, air velocity instruments, air- and water-pressure instruments, IAQ and industrial hygiene instruments, and HVAC and process instruments. Additionally, a section on air measurement basics includes a summary of the various measurement technologies and describes the advantages of each technique. Calculations for use by end users are also in the catalog.