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Glass tube variable area flowmeter
RatoSight FGM2235

The Series FGM2235 (10A2235) Ratosight Flow Rate Indicator is a rugged, low cost, glass tube variable area flowmeter that provides stable and reliable operation while measuring liquid or gas flow rates.  The meter can be supplied with the Ratolarm extension for alarm actuation.



The Ratosight variable area flowmeter is the best available low flow solution for alakali  fluids such as sea water. It is well suited for marine applications, RO systems, and forced pump lubrication and cooling as well as seal water systems.


General specifications:

  • Application
    – Clean, low viscosity liquids and gases
  • Mounting
    – Vertical and Horizontal, In line
  • Connections
    – 1/4 in. through 2” NPT Connections
  • Flow range
    – Water flows: 1.2 to 3000 GPH
    – Ari Flows: 3-6600 SCFH
  • Flow turndown
    – Typically 10:1
  • Operating pressure 
    – Up to 175 psig
  • Operating temperature 
    – Up to 250F (120C)
  • Accuracy 
    – 5% Full Scale (1” to 2” sizes), 10% (1/2” size)
  • Alarms
    – Min, Max, Min&Max
  • Tube material
    – Borisilicate 3.3 Glass
  • End connections
    – Brass/Bronze
  • Float material 
    – Aluminum, Brass & Monel (Optional)


For selecting the most suitable product for your application  


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