New range of pressure transmitters
12 November 2009
The XMD range of smart differential pressure transmitters is designed for pump and filter control, level measurement of closed, pressurised tanks, or for flow measurement in conjunction with an orifice plate, Venturi or nozzle.
Impress XMD pressure transmitter
The range is said to be ideal for flow applications due to its ability to switch the output from a standard linear output to a square root extraction where flow rate can be output..
The XMD has a differential pressure range from 75mbar up to 2 bar and with a static over-pressure capable of 130 bar line pressures. The calibrated pressure range can also be turned down 10:1 times, which means that a 75mbar range can give a full scale output at 7.5mbar, while still maintaining the 130 bar line pressure. A 5:1 turn down ratio maintains the accuracy of the transmitter, which is ±0.1% FSO.
Outputs available are 4-20mA as standard with the option of having HART® communication. If this option is selected, the XMD is ATEX-approved as standard. The device is intrinsically safe for Zone 0/1 and an Ex d version is available with a flameproof enclosure for Zone 1 applications.
The XMD range is designed for harsh process manufacturing environments and so the electrical enclosure is a two-chamber aluminium die cast, powder coated with the option to include an integrated smart display.
As Sam Drury, Sales & Marketing Director at Impress Sensors & Systems comments: “The integrated display enables the user to programme the device, including electronic damping of the signal, offset adjustment [of up to 90 per cent of full scale] and a turndown ratio of 10 to 1. The two-chamber aluminium die cast housing is prepared for chemical seals to extend the application possibilities even further.”
The optional display is an LCD with a visible range of 32.5mm x 22.5mm. There’s also a textual display and a 52-segment bar graph that runs along the bottom of the display for easy interpretation of the output from the device. Even with this display option, the XMD is still rated to IP67.
Mr. Drury says the target industries include chemicals, paper and pulp, petrochemicals, energy & power, food and dairy, and pharmaceuticals
About Impress Sensors & Systems Ltd
Impress Sensors & Systems Ltd is a manufacturer and distributor of instrumentation products based in Aldermaston, U.K. The company prides itself on its expertise in pressure measurement and its knowledge of general instrumentation.
It manufactures its own range of standard and custom-designed pressure instruments in the UK, and distributes a wide portfolio of instrumentation products from its European partners: BD Sensors in Germany and Metallux in Switzerland.
Impress specialises in offering a customised service in applications where standard products may not satisfy the technical requirements and price aspirations of customers. The company boasts the necessary technical expertise in mechanical, electronic and application engineering that enables it to supply instruments tailored to the customer’s requirements.
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