Starting at $966.00
  • Usually ships in 2-3 weeks. Call for expedite options



  • Quality 316L stainless steel construction
  • Wide range of max flow options
    • 33GPH to 450GPM (Water)
    • 4.0 SCFM to 100 SCFM (Air)
  • 120mm, direct reading, detachable scale
  • ±3% full scale accuracy
  • 10:1 to 12-1/2:1 turndown (unless otherwise indicated)
  • 1% repeatability
  • 33 to 125°F (1 to 52°C) max ambient temp
  • Max pressure
    • 1500psi (NPT Fittings)
    • 1000psi (SS Flange)


The stainless steel King Instrument 7710 series rotameter utilizes a float and tapered tube design. As a result, the 7710 series rotameters have a longer and more linear scales as well as better pointer stability and 40% greater accuracy than competitively priced products.

The King Instrument 7710 series rotameter is housed in 316L Stainless Steel. Complete with a 120mm scale, the 7710 series rotameter can be used in high pressure systems up to 1500psi and high temperature applications up to 350°F.

Options Available to the King Instrument 7710 Series Rotameter

  • Additional flange connections
  • Additional O-ring materials for chemical compatibility or higher temperatures: Maximum temperature of EPR: 225°F (107°C)
    Maximum temperature of Buna-N: 275°F (135°C)
    Maximum temperature of Viton: 350°F (199°C)
    Maximum temperature of Kalrez: 400°F (204°C)
  • 4-20mA transmitter
  • One or two alarms

Alarm Options – Inductive Slot Sensor

Like inductive ring sensors, slot sensors are 2-wire, DC, low-current devices, and are designed to be used with a remote intrinsic safety barrier/switch isolator. Single or dual slot sensors are available for the King Instrument 7700 series rotameter.