BELL & GOSSETT READ OUT METER READING RANGE 0-16 PSIG (MODEL RO-3) THE BELL & GOSSETT READOUT KITS CONSIST OF A DIFFERENTIAL PRESSURE GAUGE, HOSES WITH 90 MICRON INLINE FILTERS TO CONNECT UPSTREAM AND DOWNSTREAM OF THE FLOW MEASURING DEVICE, A SET OF READOUT PROBES, CIRCUIT SETTER CALCULATOR AND CARRYING CASE. THE RO-2, RO-3 AND RO-4 READOUT KITS HAVE VALVES TO VENT THE DIFFERENTIAL PRESSURE GAUGE. THE RO-5 READOUT KIT DIFFERENTIAL PRESSURE GAUGE CONTAINS A FLOATING PISTON WITH A CONTINUOUS BLEED ACROSS THE PISTON AND DOES NOT REQUIRE SEPARATE VALVES.Click Here for Additional Information