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Premier Control Technologies Fluid Solutions

King Instruments 7450 Series Rotameter

  • Low flow borosilicate glass tube rotameter with side plate
  • Material Options for Higher Chemical Resistance
  • Panel mountable
  • Optional control valve

The King 7450 series flowmeter offers a 75mm or 150mm Borosilicate Kinglass metering with 316L stainless steel or brass connections.

All internal components are 316L stainless steel, a control valve is optional on either the flow inlet or outlet and is available in 316L stainless steel or brass.

Viton® O-Rings are standard with optional Buna N, EPR and Kalrez®.

All models have a 10:1 turndown ratio with 1% repeatability, accuracy varies by model but this is within a ± 3% (for 150mm scaled version) to ± 5% (for 75mm scaled version) of full scale.

Maximum temperatures are available up to 93° C, with pressures available up to 13.7 bar.

Liquid models are available with full scale flows from 1.8 litres per minute to 28 LPM.

Gas models are available with full scale flows from 56 standard litres per minute to 560 SLPM.

Scales are available in any volumetric unit.

Data sheets and manuals

Model numbers

  • K.7453G11363
  • K.7453G31363
  • K.7453P11331
  • K.7453P21143
  • K.7453P21143
  • K.7453P22334
  • K.7453P22344
  • K.7453P22364
  • K.7453P31221
  • K.7453P32221
  • K.7453P32224
  • K.7453P41331
  • K.7456G11261


The King Instruments 7450 Series Rotameter is widely used in the following industries:


King Instrument Company