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Introducing the new model “T23”, expanding the IN-FLOW^CTA series of Mass Flow Meters/Controllers for industrial, food, chemical and petrochemical applications. These instruments work on the basis of direct through-flow measurement (no by-pass), following the constant temperature anemometry principle. The instruments contain no moving parts and have no obstructions to the flow path, which makes them ideal for low pressure drop applications and less sensitive to moisture or particulates. The electronics housing is IP65 (dust- and waterproof). The flow controller features an integrated, direct operating valve that can cope with high gas flow rates, with a maximum flow control range of 12-600 l_n/min. Both analog I/O-signals and RS232 connection are available as a standard feature. The flow meters and controllers are available with optional ATEX approval for use in Category 3, Zone 2 hazardous areas.