Plants Take Measurement to a Higher Level

More capable devices promise immediate and longer term benefits.

By Seán Ottewell, Editor at Large

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Meanwhile, at Emerson the quest for accurate measurement while meeting ever more stringent health and safety regulations, reducing maintenance costs and improving reliability continues to drive the company to provide better performing instrumentation with more functionality at lower cost.

One of its latest developments is a rapid (3-ns.) solid-state switch for transmitting and receiving the radar signal in a GWR device. Named direct switch technology (DST), the system reportedly provides a measurement signal that’s many times stronger than that from traditional GWR devices. It is said to offer reliable measurement over long distances and with very low dielectric materials, even when using a single lead probe. Another advance is the use of a smart galvanic interface that increases the ability of the transmitter to handle electromagnetic interference, a common phenomenon in open tanks and plastic vessels.

Magnetrol International, Downers Grove, Ill., also is enhancing its lineup. Its Digital E3 Modulevel liquid level displacer transmitter features Foundation Fieldbus H1 communications prototcol. The new transmitter is said to deliver a range of benefits, including: lower installation and operating costs due to reduced need for cable, cable trays, conduits and associated hardware; interoperability across vendors; remote diagnostics; and highly reliable data transmission.

The company’s second new offering is the Model R82 radar transmitter for level and volume applications. The emphasis here is on improved cost-competitiveness; the device allows internal adjustment of beam orientation without removing the unit from the vessel, as well as HART-communication and PACTware capabilities.

For its part, Vega, Schiltach, Germany, used the ACHEMA trade show in May to showcase the next generation of its successful plics product concept. In plics plus, reduced complexity is the key. Features include simpler adjustment thanks to an enhanced indicating and adjustment module, pluggable terminal blocks and mechanical disassembly aids, plus low operating voltage and faster signal processing.

Seán Ottewell is Chemical Processing's Editor at Large. You can e-mail him at


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