Type 133L or 133H 2 to 4 inches w.c. / 5 to 10 mbar 3.5 to 6 inches w.c. / 9 to 15 mbar 5 to 9 inches w.c. / 12 to 22 mbar 8.5 to 18 inches w.c. / 21 to 45 mbar 14 to 28 inches w.c. / 35 to 70 mbar 0.75 to 2 psig / 52 mbar to 0.14 bar
Type 133H 1.5 to 3 psig (0,10 to 0,21 bar) 2.0 to 5 psig (0,14 to 0,34 bar) 5.0 to 10 psig (0,34 to 0,69 bar)