Super User Gas Measurement Flow Meters and Flow Controllers for accurate Gas Flow Measurement Our range of Flow Meters and Flow Controllers offer precision, reliability, responsiveness and affordability for gas measurement and control applications. Available for a variety of ranges and industries utilising technologies such as: Capillary Thermal, Immersible Thermal and Mass Vortex. Our range of Sierra Instruments gas flow meters meet exacting standards, and can also be customised to meet your application requirements. FastFlo 620S Sierra Instruments The 620S is an insertion thermal mass air flow sensor that has been designed to give you a highly reliable, responsive and affordable mass flow measurement . BoilerTrak 620S-BT Sierra Instruments The 620S-BT has been designed to provide an economical, easy-to-install solution for precise natural gas measurement for heaters and boilers. SmartTrak 100 Sierra Instruments The SmartTrak 100 is a range of digital mass flow meters and controllers. Suited for Industry and Research with thermal technology and a small footprint. SmartTrak 50 Sierra Instruments The SmartTrak 50 is a low cost range of digital mass flow meters and controllers. Featuring a large display, small footprint. Suited for Industry and Research. SmartTrak 140 Sierra Instruments The SmartTrak 140 is an Ultra Low Pressure Drop Mass Flow Controller, user friendly it has been designed for stable, accurate and repeatable gas mass flow control. ChlorineTrak 760S Sierra Instruments The 760S has been designed for accuracy and a cost-effective mass flow measurement solution for chlorine injection processes found in typical waste-water treatment. MaxTrak 180 Sierra Instruments The MaxTrak 180 is an Industrial Digital Mass Flow Controller that is suited for dirty industrial processes and available with 316 stainless steel flanges. SmartTrak 100 HP Sierra Instruments The SmartTrak 100 HP is a range of Ultra High Pressure Gas Mass Flow Meters and Controllers that are field adjustable, measure and control up to 5000 psig. MassTrak 810 Sierra Instruments The 810 is an economical Digital Mass Flow Controller with a large LCD screen that has been designed to control the flow of air and all inert gases and mixtures. TopTrak 820 Sierra Instruments The TopTrak 820 is part of the economical 800 range of Mass Flow Meters with proven direct gas flow measurement. Ideal for general Industry applications. QuadraTherm 780i Sierra Instruments The 780i is the most accurate inline thermal mass flow meter for air/gas flow rate measurement on the market today. Part of Sierra's Big 3 iSeries. qMix Software Sierra Instruments The qMix™ software from Sierra Instruments is a powerful, user-customisable gas mix feature included with every QuadraTherm® thermal mass flow. Pro-V M22 / M23 Vortek Instruments The Models M22 and M23 are great for use in applications ranging from general water flow measurement to hydrocarbon fuel flow measurement. Turbo-Pro Pro-T Vortek Instruments The Turbo-Pro Pro-T is available with a wide range of options and meter configurations to meet your specific application requirements.