Sage 300 Flow Meter

The Sage 300 is a low-cost thermal mass flow meter offering the same level of accuracy, low-end sensitivity, repeatability, response time, turndown, and resolution as the Sage Prime®, without the bells and whistles.

Sage 300 Thermal Mass Flow Meter

The Sage 300™ is the obvious choice for those customers who want the benefits of mass flow measurement with excellent performance, yet are willing to sacrifice some premium features. When comparing the 300 to the Sage flagship model (Prime), one will notice that instead of the advanced graphical display, there is a simple screen providing flow rate, total flow, and temperature.

Another noticeable deviation from the Prime is that the 300 doesn’t offer Sage’s award-winning in-situ calibration verification. For this reason, if verifying calibration while in the field is essential, purchase the Sage Paramount.

Features & Benefits

The 300 is packed with features and benefits. The meter is agency-approved for use in Class I, Division 2 hazardous areas, and CE approved. It is available with 24 VDC or 90-265 VAC input power, and like other Sage meters, it has the lowest power dissipation in the industry. The 300 offers 4-20 mA signal and pulsed output of totalized flow, and Modbus RTU with RS-485 communications is optional.

The flow meter is available with integral or remote electronics. The remote design offers lead length compensation up to 1000 feet and uses a NEMA 4 and explosion-proof junction box. The meter also comes calibrated from the Sage NIST traceable calibration lab preconfigured with the specified process and installation parameters for the application.

If you need to verify that the meter is still in calibration while in the field, consider the Sage Prime.


The Sage 300 is ideal for many applications requiring the measurement of gas mass flow, including:

  • Combustion air
  • Compressed air flow measurement
  • Natural gas flow to burners
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