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Sierra Instruments

Sierra Instruments is a California-based manufacturer specializing in thermal mass flow meters, mass flow controllers, and ultrasonic flow measurement technology for gas and liquid applications. Best known for its QuadraTherm series of thermal mass flow meters, which use patented DrySense sensor technology to virtually eliminate drift and deliver Coriolis-rivaling accuracy, Sierra Instruments equipment is trusted across compressed air auditing, biogas and flare gas monitoring, combustion air control, and emissions compliance reporting. Its flow meters serve power generation, wastewater treatment, oil and gas, chemical processing, and semiconductor industries, where dependable low-flow and high-turndown gas measurement directly affects energy efficiency and regulatory compliance. As a trusted supplier of Sierra Instruments in Oman and the GCC, Seven Star LLC supplies genuine QuadraTherm thermal mass flow meters with manufacturer warranty and regional technical support, helping industrial facilities in Muscat, Sohar, and Salalah achieve accurate gas flow measurement and emissions accountability.

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Sierra Instruments QuadraTherm 640i Thermal Mass Flow Meter

Sierra Instruments QuadraTherm 640i Thermal Mass Flow Meter

Sierra Instruments

In stock

Frequently Asked Questions

How do Sierra Instruments thermal mass flow meters measure gas flow?
Sierra Instruments QuadraTherm meters use heated sensor elements to measure the cooling effect of gas flow, directly deriving mass flow rate without separate temperature and pressure compensation. The patented DrySense sensor design resists drift and contamination over long service life.
Can Sierra Instruments flow meters integrate with SCADA or DCS systems?
Yes. Sierra Instruments meters output standard 4-20 mA, Modbus RTU, and digital signals, allowing direct integration into SCADA, DCS, and plant historian systems for continuous gas flow monitoring.
Are Sierra Instruments meters suitable for hazardous or ATEX-rated environments?
Yes, ATEX and IP66-rated QuadraTherm variants are available, making them suitable for biogas, flare gas, and other hazardous-area gas measurement applications.
What industrial applications typically use Sierra Instruments flow meters?
Sierra Instruments thermal mass flow meters are widely used in compressed air auditing, combustion air control, biogas and flare gas monitoring, emissions compliance, and wastewater aeration across power, oil and gas, and municipal utility sectors.
Does Seven Star LLC supply genuine Sierra Instruments products?
Yes, Seven Star LLC is a trusted supplier of Sierra Instruments in Oman and the GCC, supplying genuine QuadraTherm thermal mass flow meters with manufacturer warranty and regional technical support.