Gas Mass Flow Measurement and Control

Industry’s Most Accurate Air / Gas Thermal Insertion Mass Flow Meters

Sierra’s QuadraTherm® 780i – is the most accurate thermal flow meter in the world. It measures gas mass flow with excellent accuracy and long-term stability.

The patented mass velocity sensor measures mass flow directly of inert gases, flammable gases and corrosive gases. It is inherently superior to methods which measure volume and correct for temperature and pressure.

The meter has built-in calibrations for air, argon, carbon dioxide, chlorine, digester gas, helium, hydrogen, methane, nitrogen, oxygen and propane. It can be calibrated for any other gas or mixture at Sierra’s in house, independently certified flow laboratory.

The meter has a built-in facility to perform field validation of the flow calibration. The QuadraTherm has outputs for mass flow, temperature and pressure.

Flow meter

QuadraTherm® 780i

  • Achieve the highest accuracy +/- 0.5% of reading
  • Eliminate drift with Dry Sense sensor
  • Reduce straight-run requirements with built-in flow conditioning
  • Needs only 1-diameter up and zero downstream diameters
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty

Gas Mass Flow Meter / Controller

Sierra’s Mass-Trak meters measure and controls the flow of any clean gas, including toxic or corrosive gases, in any range from 0 – 4 standard cubic centimetres per minute to 0 – 1,000 standard litres per minute. The all-digital Smart-Trak Sierra is pre-programmed for ten commonly used gases.

Simply select air, argon, carbon monoxide, methane, helium, hydrogen, oxygen, nitrogen or nitrous oxide. The stainless steel construction is suitable for any clean gas and its small footprint facilitates drop-in replacement of any mass flow controller. The Sierra Smart-Trak is a very reliable mass flow meter/controller.

Flow meter
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