Starting at $1,340.00
  • Usually ships in 2-3 weeks. Call for expedite options



  • Water flow range: 33GPH to 16.5GPM
  • Air flow range: 2.2 SCFM to 76 SCFM
  • 120mm, direct reading, detachable scale
  • ±3% of full scale flow accuracy
  • 10: 1 turndown
  • 1% repeatability
  • 400°F max temperature
  • 33 to 125°F ambient temperature


The King Instrument 7750 series rotameters are 316L stainless steel meters that feature flange connections, all welded construction (no elastomers), and an end to end length of 250mm. A float and tapered tube design on the 7750 Series Rotameter provides longer, more linear scales and the optional Alarms or 4-20mA transmitter adds to its versatility.

The King Instrument 7750 Series Rotameter is available with an optional single or dual inductive slot sensor alarms or a 4-20mA transmitter. Standard scales are available for water and air, and custom scales can be ordered on request. The King Instrument 7750 series rotameters' maximum water capacity is 33GPH to 16.5GPM and the maximum air capacity ir 2.2 SCFM to 76 SCFM. The King Instrument 7750 series rotameter has a 10:1 turndown ratio, ±3% of full scale flow accuracy, and 1% repeatability.