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Allison Engineering

Innovative Solutions for
Process Control

Gas Mass Flow Meters


The ST50 is an low cost, general purpose thermal mass flow meter for ideally suited to measuring Compressed air. An insertion device for pipe sizes > 1 1/2″ 

The ST50 is easy to install, fully programmable, and can be inserted and removed “live” with a standard full bore ball valve.

It features an optional LCD display of flow rate and communicates via two 4-20mA signals and a pulsed output.

Key Features

  • Low cost
  • 316 st/st wetted parts
  • pipe sizes from 2″ to 24″ diameter
  • analogue and pulsed outputs