Starting at $980.00
  • Usually ships in 2-3 weeks. Call for expedite options



  • 60mm direct reading scale
  • 0.16 to 25GPH (water) or 1 to 120SCFH (air)
    • ±5% of full scale flow accuracy
    • 1% repeatability
  • Max pressure of 4000psi (without valve)
    • 1500psi (with valve)
  • Max temperature of 400°F (depends upon o-ring)
  • 316L SS metering tube
  • Alarm available


The King Instrument 7100 series rotameter features metering tubes that are constructed from 316L stainless steel. The internal components are available in 316L stainless steel or Hastelloy C-276. The inlet / outlet fittings of the King Instrument 7100 series rotameter are 1/4" FNPT with an optional horizontal control valve. This series rotameter has fitting material that is constructed from 316L stainless steel, with 1/4" FNPT connection type. Elastomers (valve meters only) are available in Viton, Buna N, EPR and Kalrez, and the case and side cover are die cast aluminum.

The King Instrument 7100 series rotameter has maximum flow capacities of 0.16 to 25 GPH-water; 0.6 to 95 LPH water; 1 to 120 SCFH air; 28.3 to 3400 SLPH air.

The King Instrument 7100 series rotameter features an optional alarm mechanism, which is an inductive slot sensor. It is a 2-wire, DC, low current device. This rotameter is designed to be used with a switch isolator / barrier. Intrinsically safe alarm components are also available.