Dwyer Instruments 475 series Mark III hand held digital manometer measures positive, negative or differential pressures of air and natural gases. The dual push buttons on the front panel control the on/off, auto zero, and pressure unit selection, allowing for simple operation with no set-up needed. When used with a pitot tube (u), the Series 475 can also be used as an air velocity gauge.
Rugged aluminium case protects instrument from damage during transport/use
Large, easy to read LCD and simple operation