Variable area flowmeters Series M21

Débitmètre à section variable M21 Débitmètre à section variable M21 Débitmètre à section variable M21
Application areas
Suitable for all kind of industries for low flow measuring.
Product description
Variable area metal tube flowmeters for low flows of liquid, gas and steam. Metallic construction. High performance measurement under extreme working conditions of temperature and pressure. Indication by means of magnetic coupling, low pressure drop and float damping mechanism for gas service. Flow measurement in vertical pipes.
Technical specifications

Suitable for vertical upwards flow

Indicator housing in aluminum. Available in SS 316L on request

Measuring ranges:

  • 0,4 l/h … 1000 l/h H2O
  • 12 Nl/h … 30 Nm3/h air


  • +-4% f.s.


  • ¼” … ¾” BSP, NPT
  • Sanitary connections DN10 … DN25


  • EN 1.4404 (SS 316L)

Local indication


  • Regulating valve
  • Design for high pressure on request
  • 1 or 2 adjustable inductive switches
  • Electronic transmitter with 4-20 analog output 2 wires, Ex version on request
  • Constant flow regulator RCD or RCA