Mass Flow Meters/Controllers for low pressure drop or corrosive gas service

LOW-ΔP-FLOW

> Introduction
Bronkhorst High-Tech B.V., the European market leader in thermal Mass Flow Meters/Controllers and Electronic Pressure Controllers, has more than 25 years experience in designing and manufacturing precise and reliable measurement and control devices. With a wide range of instruments, Bronkhorst High-Tech offers innovative solutions for many different applications in many different markets. The instruments are made to customers’ specification, in various styles, suitable for use in laboratory, industrial and hazardous areas, in such diverse applications as semiconductor and analytical installations, to name but two.

> OW-ΔP-FLOW series for low pressure L drop or corrosive gases
In a number of applications for measuring and controlling gas flows there is only little differential pressure available and/or allowable. These are the applications for which Bronkhorst High-Tech developed the LOW-ΔP-FLOW series, in which the flow resistance is minimised by using a large bore capillary (thermal bypass sensor) in combination with a cylindrical flow splitter (laminar flow element). Based on this concept, mass flow capacities between 0…10 mln/min and 0…1000 m3n/h can be measured. At a flow up to 2 ln/min a pressure drop of less than 1 mbar is required. Furthermore the larger flow channels minimise the risk of clogging and facilitate the cleaning and purging of these LOW-ΔP-FLOW instruments, which will contribute to a significantly longer lifetime when the instruments are used on corrosive gas service. All fluid wetted parts are of electro-polished stainless steel. Optionally the flow meter body, sensor and flow element can be supplied in Hastelloy or Monel.

> Mass flow control with low differential pressure
The control of mass flow with small pressure difference comprises the LOW-ΔP-FLOW Mass Flow Controllers in compact construction