475-7-FM - 

THE DWYER SERIES 475 MARK III HANDHELD DIGITAL MANOMETER is ideal for field calibration, monitoring or trouble shooting HVAC systems, clean rooms, or a wide range of other low pressure pneumatic systems. This handy instrument measures positive, negative or differential pressures of air and natural gases in ranges from 1 in w.c. (0.249 kPa) to 150 psid (10.34 bar). Its simple operation and easy to read digital display make it an indispensable test instrument for the plant engineer, industrial hygienist and HVAC technician. When used with a Dwyer Pitot tube, the Series 475 Mark III can also be used as an air velocity gage. See the complete 475-1-AV kit.