Thermal mass flowmeters have made a name for themselves in the field of low gas flow, where all other flowmeter technologies have failed. As a result, it has conquered numerous niches in a number of sectors. And what's more, it has been able to expand to ever higher gas flow rates, with a focus on BRONKHORST's MASS STREAM series.
The compact, rugged thermal mass flowmeters in the MASS-STREAM range are ideal for industrial applications.
Solid stuff!
Thanks to CTA (Constant Temperature Anemometry) technology, these instruments are less sensitive to humidity or pollution in the gas being measured, ensuring robustness and longevity. A 316L stainless steel version enables the instruments to be used with corrosive gases such as ammonia in the textile industry. Designed with an IP65 enclosure, they are waterproof and dustproof.
Simplicity
The instruments are available as measuring instruments only, or as controllers, with the latter version featuring the measuring element, the control board and the valve on the same baseplate, thus reducing costs, and in particular programming time for setting up control cycles on a PLC. The master/slave function included on the electronic board facilitates management of gas mixing ratios, such as in furnace or burner installations.
Unlike insertion flowmeters, which require the probe to be perfectly aligned in the pipe in order to maintain good measurement accuracy, MASS-STREAM instruments are easily mounted using quick-fit fittings (double ferrules, plug-in, etc.).
The devices can be easily integrated: they feature a digital interface with several protocol options (PROFINET, MODBUS, RS232, etc.). Local control is possible with an integrated TFT display for setpoint/measurement management and all digital instrument parameters.
A major asset for high flow rates
The MASS-STREAM series covers a wide range of flow rates, from 10 mln/min (G ¼'') with model D-6310 to 600 m3n/h (G 2'') with model D-6390.
Up to 8 calibration curves can be stored, enabling the instrument to be used with different gases in the same process, e.g. several oxidizing agents such as natural gas, propane or butane. Another advantage of this feature is that several flow ranges can be pre-registered, thus extending the instrument's flow range.
Numerous valve coefficients are available for the actuators, increasing the flow and pressure range possibilities. While Coriolis mass flowmeters on the market generate high pressure drops, thermal mass flowmeters in 1" or 2" mounting are an excellent alternative for low-pressure installations.