Fig. Inter. - Figure Interval. Increments between PSI numbers on gauge face. Grad. Inter. - Graduation Interval. Fractional increments between PSI numbers on gauge face.
Features:
2-1-2% Accuracy on 2 1/2"; 1% accuracy on 4"
Acrylic window with membrane assembly
Copper alloy bourdon tube
Brass movement with highly polished bearing surfaces
Glycerin filled
Ambient temperature range of -4ºF to 140ºF
2 1/2" Face gauges have solid cast brass case with polished brass slip-fit ring
4" Face gauges have cast brass, silver painted case with chrome plated brass ring
