3-in-1 transmitter measures pressure, dp and temperature
July 2007
Maintenance, Test & Measurement, Calibration
Foxboro multivariable transmitters provide measurements of pressure and differential pressure, sensor and electronics temperatures, and process temperature (from an external RTD) in a single device. These transmitters let users replace three separate transmitters with one, meaning fewer transmitters, less wiring, fewer shutoff valves, and fewer process penetrations. These factors help to realise significant savings on purchase, installation, maintenance and inventory.
The IMV25 transmits digital process measurements of pressure, differential pressure, and process temperature, as well as internal sensor and electronics temperatures. It is well-suited for applications where a number of individual measurements are to be brought into a system for monitoring, control, or calculation. The transmitter is available with a choice of communications options including HART, Modbus, Foundation Fieldbus and Profibus. A single 4 to 20 mA analogue output is also provided.
"The IMV25 multivariable transmitter provides economy and flexibility for natural gas flow measurement applications by enabling customers to replace separate static pressure, differential pressure, and temperature transmitters with a single transmitter that digitally communicates all three measurements to the customer's system. This saves not only the cost of the separate transmitters, but also the costs and issues associated with separate transmitter installation, wiring, and setup," says Joseph Downey, marketing director for the Foxboro Measurements & Instruments Division of Invensys Process Systems.
A common process connection technique for natural gas flow measurement applications is to mount transmitters directly to a three- or five-valve manifold assembly that is supported by the process piping. To make this direct mounting easier, the multivariable transmitter has a low profile design. This uses a compact sensor body to minimise the overall height of the transmitter and to allow use of process covers with process connections facing downward. This allows customers to use a common installation design for both competitive Coplanar and Foxboro Low Profile transmitters.
Low profile transmitters are available with compact three or five-valve manifolds and are offered with an optional adapter plate to allow installation directly onto existing Coplanar manifolds for easy retrofit.
For more information contact Protea Automation Solutions, +27 (0)11 719 5792, [email protected], www.protea.co.za
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