Flow Energy Management Solution for Industrial Facilities

QuadraTherm™ 640i/780i Thermal Flow Meter Part of Sierra’s One Complete Flow Energy Solution

QuadraTherm™ 640i/780i Thermal Flow Meter Part of Sierra’s One Complete Flow Energy Solution  (Credits: Sierra Instruments)

Sierra Introduces One Complete Industrial Flow Energy Solution - 3 Advanced Technologies Cover all Air, Gas, Water, and Steam Applications.

Sierra Instruments announces the launch of its new flow energy solution for optimizing and managing flow measurement for industrial facilities of all sizes. It features Sierra’s QuadraTherm 640i/780i thermal flow meters, their InnovaMass 240i/241i vortex flow meters, and their new InnovaSonic 207i ultrasonic flow meter.

Designed, built, and calibrated in the USA by Sierra, the Big-3TM share the same innovative Raptor firmware and many of the same software apps. They are a complete flow energy solution for flows like compressed air, steam, natural gas and hot and chilled water. Together, they set a new standard in ease-of-purchase, performance, reliability, accuracy and ease of use.

“In larger facilities, there are a wide variety of flow energy applications that require measurement,” says Matthew Olin, President of Sierra.

Engineers often must contend with an assortment of companies to obtain the right instrumentation. With the Big-3, we’ve eliminated many of the overwhelming challenges they face. They now have the option of acquiring all necessary flow meters from one company, saving time and money on installation and maintenance. And one contact point links them to Sierra’s global network of flow energy experts for all of their support requirements.

Matthew Olin, President of Sierra


The Big-3 share common firmware and software for easy integration, set up, and serviceability, allowing operators to leverage their knowledge between the different platforms. All patented Big-3 (thermal, vortex, and ultrasonic) sensors provide incomparable accuracy, extensive flow knowledge through multivariable functionality, and benefit from the Raptor operating system to manage sensor inputs.

QuadraTherm iSeries thermal sensors offer a no-drift sensor with a lifetime warranty and accuracy of +/-0.5% of reading. QuadraTherm’s four sensor technology provides the critical inputs for Raptor's living, learning algorithm set and gas database to accurately manage changes in gas and pipe selection, gas pressure, gas temperature and outside temperature.

InnovaMass vortex sensors combined with the Raptor OS offer a patented Mass Balance sensor, improved DSP, and achieve flows below 1 fps. The InnovaMass iSeries measures up to five process variables with one process connection: volumetric flow rate, mass flow, pressure, density and temperature, which is perfect for highly accurate steam flow measurement.

The InnovaSonic 207i ultrasonic flow meter ensures accuracy of +/-0.5% of reading from 0.16 to 40 ft/s (0.05 to 12 m/s). This is maintained even if liquid density changes as the temperature of a flowing liquid moves up and down over time. Sensors are designed for temperature compensation to ensure correct speed of sound for increased accuracy and ease of installation.

Raptor, the Big-3’s shared firmware system, is a fluid, dynamic algorithm set that has hyper-fast microprocessors, delivers digital communication protocols, provides field flexibility, and enables software apps. For QuadraTherm (thermal), Raptor calculates out unwanted heat transfer to provide precise mass flow rate.

QuadraTherm also comes with on board qMix gas mixing software, which enables engineers to produce custom gas mixtures in the field to compensate for gas compositional changes without recalibration costs and loss of accuracy. With InnovaMass (vortex), Raptor reduces external vibration with proprietary noise reduction algorithms to enhance the signal-to-noise ratio.

Raptor firmware also gives InnovMass iSeries the ability to measure much lower flow velocities (near 0.5 fps) than equivalent vortex meters in the industry. In the InnovaSonic (ultrasonic) flow meter, Raptor, with its temperature input, adjusts fluid density calculation in real-time to sustain accuracy. Most ultrasonic metes assume a fixed temperature and thus lose precision.

In addition, the Big-3 has shared software apps with common home screens. With the Big-3 there is no learning curve on three different software platforms. Big-3 software apps means plant engineers and managers can mine and analyze data quickly to make effective productivity decisions.

Software apps include ValidCal Diagnostics for field calibration validation, Datalogging, MeterTuning to automatically cancel external noise to improve accuracy, Dial-A-Pipe to change pipe size in the field, and Dial-A-Fluid to change fluid type in the field without losing accuracy.

The precision of the Big-3 is backed up with world-class calibration. Flow meters are only as good as their calibrations, and Sierra has invested millions in its state-of-the-art, fully automated, gas and liquid calibration facilities to guarantee consistent accuracy and repeatability of its flow meters. Sierra is ISO certified and follows ISO17025 guidelines. All Big-3 flow meters come with a NIST traceable and fully ISO 17025 compliant Cal cert.

All three flow meters that make up the Big-3 are designed, built, and calibrated in the USA – a first for any American company. Commissioning to set up the Big 3 is also available through Sierra’s global network of flow energy experts.


This information has been sourced, reviewed and adapted from materials provided by Sierra Instruments.

For more information on this source, please visit Sierra Instruments.


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