Dupleix Liquid Meters (DLM), southern African distributors for Solartron Mobrey, has launched an ATEX EExd-compliant variable area (VA) flowmetering solution for the oil and gas, chemical and energy industries. The Rotameter 250 series is now available with a built-in, explosion-proof 4 to 20 mA transmitter. As a result customers can now use this proven, reliable technology to measure the flow of gases and liquids in a wide range of hazardous applications.
The robust metal tube design of the Rotameter 250 is suitable for use in corrosive and aggressive environments such as those found in oil refineries, chemical processing plants and nuclear energy plants. The new ATEX EExd-approved unit provides reliable indication of flow, within 2% of full scale reading, in high temperature, high pressure applications up to 150°C/5 MPa. The 'blind' 4 to 20 mA output can be used to connect to a standalone indicator, PLC or other plant monitoring system.
Local indication via a large scale and pointer can be provided within a separate indicator housing, and if required, so can two field adjustable alarms.
Designed for easy installation, the new explosion-proof transmitter unit measures 250 mm between flanges as standard, although threaded versions are available. When installed, the flowmeter is mounted in a vertical line with the flow in the upward direction. When the flow passes through the meter the float rises to a position of equilibrium where the weight of the float is balanced by the net force of the fluid pressure. The float is magnetically coupled to the instrument, and its movement generates the output signal.
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