Dwyer 475-3-FM Manometer Manometer, Digital, 0 – 199.9 in. w.c/0 – 49.7 kPa – Each

Measures positive, negative or differential pressures of air and other gases
New FM approved option is intrinsically safe for hazardous locations, Class I, Div.1, Group A, B, C, D, T4
When used with a pitot tube, can also be used as an air velocity gauge
Dual push pads on the front panel control on-off operation and English or metric pressure unit selection – all with no set-up or levelling
Zero adjust knob is conveniently located on top
Large 1/2″ LCD display is easy to read in even the poorest lighting conditions, includes a “low battery” indicator
Standard connections are dual sized for 1/8″ or 3/16″ I.D. vinyl or rubber tubing