Premier Control Technologies Fluid Solutions
King Instrument Company manufactures one of the most comprehensive ranges of variable area flowmeters (rotameters) available today. Their portfolio includes solutions for laboratory, OEM, process plant and high-pressure applications, covering extremely low flows through to high-capacity industrial measurement.
Premier Control Technologies supplies the full King Instrument range, helping customers select the most appropriate meter based on flow range, fluid type, pressure rating and installation requirements.
These all-metal rotameters provide excellent durability where pressure, temperature or aggressive media rule out glass or plastic tubes.
7100 Series - Compact High Pressure Meter
Low-flow stainless steel tube rotameters with a magnetically coupled dial indicator and compact 60 mm scale. Ideal for gas and liquid applications requiring rugged construction and high pressure capability. Available in stainless steel, Hastelloy® or Monel with ranges from approximately 0.16–25 GPH water / 1–120 SCFH air.
7710 Series - Industrial Workhorse
All-316L stainless steel tube rotameters with direct reading 120 mm scale and ±3% FS accuracy. Suitable for demanding services with ranges from roughly 33 GPH up to 450 GPM water, plus gas measurement options.
7750 Series – All-Welded Stainless Construction
Compact all-welded 316L design without elastomeric seals, making it ideal for high integrity systems and skid installations. Available with flanged connections and optional 4–20 mA transmitter output.
Acrylic rotameters provide excellent value and simplicity for many industrial and laboratory applications.
7200 Series – General Purpose Acrylic Meter
Machined acrylic meters with 127 mm scale and in-line connections, suitable for everyday air and water measurement.
7510 & 7511 Series – Panel Mount Acrylic Block Meters
Compact in-line acrylic block rotameters commonly used in OEM equipment and laboratory panels.
7520 & 7530 Series – Horizontal Panel Mount Meters
Acrylic meters with horizontal connections. The 7530 series includes an integral metering valve for flow control.
7310 Series – Polysulfone Tube with Stainless Case
Moulded polysulfone tube inside a stainless steel housing providing a protected yet lightweight flowmeter design.
7330 Series – Union End Polysulfone Meters
Polysulfone tube rotameters with union or socket weld connections for easy installation and maintenance. “No metal” internal configurations are available for ultra-pure liquid service.
7720 Series – PVC Tube Rotameter
Constructed from Type 1 Grade 1 PVC, these meters are well suited for chemically aggressive fluids where glass visibility is not required. Features a dial indicator with a 120 mm scale.
Glass rotameters provide excellent readability and accuracy, making them widely used in laboratories, gas purging and process monitoring.
7430 Series – Horizontal Connection Glass Meters
Low-flow gas purge and liquid meters with borosilicate glass tubes and stainless frames. Designed with horizontal connections for flexible panel layouts.
7440 Series – Vertical Connection Glass Meters
Similar performance to the 7430 series but with vertical porting, ideal where pipework approaches from above or below.
7450 Series – Compact Panel Mount Meters
Side-plate glass meters with optional integral control valve and 75 mm or 150 mm scale lengths. Suitable for compact panel installations.
7459 Series – High Accuracy Glass Rotameter
Precision model featuring a 250 mm scale and polycarbonate protection shield, delivering excellent readability and accuracy.
7460 Series – Economical Glass Flowmeter
Cost-effective glass rotameter with stainless steel internals and simple in-line FNPT connections, ideal for general plant duties.
7470 Series – Versatile Process Flowmeter
Flexible installation options including horizontal or in-line orientation, NPT or flange connections and a 127 mm scale.
7480 Series – High Flow Glass Meter
Designed for higher capacity flow measurement, featuring a 250 mm scale and stainless steel construction.
7610 Series – Enclosed Stainless Case Flowmeter
Glass tube meters protected within a fully enclosed stainless steel case, offering increased durability for plant floor environments.
7650 Series – Chemical Resistant Glass Meter
Specially designed for chemical services with PVC/CPVC fittings and corrosion resistant elastomers, suitable for liquid applications only.
7910 Series – Dual Port Installation Flowmeter
One of the most versatile models with dual connection ports (vertical and horizontal) and ±2% accuracy across a wide range of flows.
9000 Silver Series – Removable Tube Design
Versatile removable glass tube meters offering multiple tube sizes and flow ranges, making them easy to maintain and adapt.
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