LOW-δP-FLOW Mass Flow Meters/Controllers for low pressure drop or corrosive gas service For applications with only little differential pressure, Bronkhorst High-Tech developed the LOW-δP-FLOW series mass flow meters and controllers. In these instruments, the flow resistance is minimized by a different sensor and by-pass construction. lowest range 0,2 ... 10 mln/min. highest range 20 ... 1000 m3n/h. The control of mass flow with small pressure difference comprises the LOW-δP-FLOW Mass Flow Controller in compact construction; control valve and flow meter are integrated in one body. The maximum flow in these compact models is 1...50 ln/min Air, depending on the operating conditions. For the control of higher flow rates at very low differential pressures Bronkhorst High-Tech has devised special control valves with pressure compensation bellows (types F-004AC/F-004AI/F-00 4BI). These control valves are piped on to the flow meter while the electronic PI-control function is an integral part of the flow meter. "Multibus" Digital Mass Flow Meters/Controllers Bronkhorst High-Tech developed their digital instruments according to the flexible "multibus" concept, due to which the instruments can be equipped with on-board interface board with DeviceNetTM, Profibus-DP®, Modbus or FLOW-BUS protocol. More information about digital "multibus" communication. Features: Very low pressure drop Longer lifetime when used on corrosive gases Lower contamination risk Easy to clean Electro-polished stainless steel wetted parts Available with control valve to constitute a complete, compact control loop Available with industrial (IP65 weatherproof) housing Applications: Environmental air sampling at atmospheric conditions Leak rate tests Gas consumption measurement, for example of natural gas, in low pressure gas distribution systems Burner control