Molded plastic manometer, range 0-2.5" w.c. & 0-6300 fpm, blue oil, 1.91 sp. gr., requires Pitot tube sold separately.
Construction is simple with virtually indestructible molded white styrene-acrylonitrile housing, indicating tube and fluid wells, molded ABS knobs and zero adjust plunger, shock mounted glass level vial and leak proof "O" ring seals. Scales are lithograph printed on aluminum and epoxy coated.