The new FLEXI-FLOW Series combines fast and stable chip sensors with reliable and accurate bypass technology. The compact, innovative instruments are a quantum leap forward in mass flow measurement and control. The FLEXI-FLOW can accurately measure and/or control mass flow rates and pressures of clean and dry gases in a fluid system. This flow meter and controller is best suited for general purpose, indoor (dry) applications like laboratories and machine enclosures.
The FLEXI-FLOW Series is suited for accurate measurement of flow ranges between 0…500 mln/min and 0…20 ln/min at operating pressures between vacuum and 17 bar(a). The flow instrument combines a swift and stable thermal mass flow sensor based on capillary MEMS technology with a precise and proven by-pass construction. Due to the unique TCS Technology (Through Chip Sensor), accurate mass flow measurement, virtual independence of variations in temperature and line pressure is established. In combination with integrated temperature and upstream and downstream pressure sensors, the embedded database for 22 gases allows accurate, on-board conversion.
The FLEXI-FLOW concept offers the option of built-to-order designs for OEM customers, in which various multiple channels Mass Flow & Pressure Meters / Controllers are combined into one microfluidic system. The following functional modules can be configured into one compact sub-system: mass flow meter or controller, pressure meter or controller, shut-off valve, mixing chamber. Such a ”plug and perform” assembly ensures space efficiency, cost reduction and a minimum of potential leak points.
Bronkhorst has created a completely new concept for measuring mass flow using the thermal measuring principle. The unique TCS Technology (Through Chip Sensor) combines the best of two technologies: a fast and stable chip flow sensor applied in Bronkhorst’s proven by-pass construction. Due to the TCS Technology, accurate mass flow measurement, virtual independent of variations in temperature and line pressure is established. By measuring the actual process conditions (temperature and line pressure), a real-time correction is made to the measured value. And because all gas properties are available on-board, accurate conversion to other gases is possible.
Due to the ultra-thin sensor tube, the sensor reacts instantaneously to changes of the gas flow, resulting
in very fast flow measurement. Combined with a direct acting control valve, settling times smaller than 150 ms are achieved. Besides mass flow measurement, the instrument has an integrated temperature sensor and 2 pressure sensors (instrument inlet and outlet pressure). These measurement parameters do not only provide information about the instrument but also about the process conditions.
Select your process gas. With 22 on-board gases, it is very easy to switch to another gas or mixture. Additionally, the on-board gas database is used for real-time corrections on the flow measurement based on the actual process conditions (temperature and line pressure).
The instrument shows the status of self-monitoring and diagnosis by means of a coloured LED. This signal can be easily recognized by the operator. For more details the diagnostic parameters can be used.
We have been able to reduce the footprint by 35% compared to similar instruments up to 20 ln/min. Due to this compact size, the instrument is very suitable to be used inside desktop equipment or at places where space is limited.
For easy setup outside the installation, the USB-C port can be used. Communication can be established with the Bronkhorst FlowSuite software without the need of an additional power supply. During operation, this port can also be used to monitor the instrument without disconnecting the power and data connection. To enhance user flexibility, a wireless connection allows monitoring the instrument without disconnecting the regular power and data connection. In case Bluetooth is not desired, this function can be disabled.
Due to the accurate conversion, calibration with valuable or rare gases is no longer necessary. In addition, Bronkhorst’s products are known for their low power consumption. The reduced size and weight of the instrument minimizes its environmental impact. Prepared for predictive maintenance and diagnostic functions by means of datalogging of several parameters, that can be used to predict the health status of the instrument and condition of the process. With multiple configurable alarms the information can be transferred to the user.
FLEXI-FLOW Compact instruments can be combined to build a compact system that is ready to use. Multi-channel systems up to 8 channels can be easily created with the help of configuration software. The use of distribution chambers at the inlet or mixing chambers at the outlet ensures a compact and small build of the system. Communication from the multi-channel system to the PLC can be established with additional gateways. Since the system is completely assembled and tested at Bronkhorst, the effort required for commissioning is kept to a minimum.