ALNOR Thermo-anemometer Model 9850 AKA TSI 9850 Compuflow
The Alnor Thermo-Anemometer Model 9850 (also known as the TSI 9850 Compuflow) is a legacy, pocket-sized analog air velocity meter. Manufactured by Alnor / TSI, this tool was officially discontinued on December 31, 2003