Posts Tagged ‘chemical’

ABB level transmitter helps Robinson Bros keep the lid on explosive chemical

August 7, 2013

Thanks to our AT100 magnetostrictive level transmitter, Midlands-based manufacturer of speciality chemicals, Robinson Brothers, are now able to meet strict safety standards regarding the storage of highly reactive carbon disulphide (CS2).

CS2 is so reactive that it has to be stored under a layer of water to prevent it from igniting, and the level of the interface between the water and CS2 requires constant monitoring. Therefore it is essential that any associated measurement devices is safety-critical.

Level measurement was previously achieved using a very simple magnetic float-based device that provided a local indication of the level but didn’t link in to any wider control system. However, an ongoing programme of improvements at the plant called for updated state-of-the-art innovative solution fully enabled for the latest communications.

This [float] principle of measurement had given many years of faultless service in what is a demanding application. In simple terms, magnetostrictive systems can be thought of as a “float on a stick”. The “stick” is actually a sensing tube wrapped around a wire that receives regular electrical pulses. Each current pulse interacts with the magnetic field created by the magnetic float to produce a torsional stress wave in the wire. This stress wave travels at a fixed speed along the wire to a patented piezo-magnetic sensing element in the transmitter assembly. The transmitter measures how long it takes for the wave to reach the sensor, which indicates how far away the float sits as it moves up and down the sensing tube in step with the liquid interface.

As CS2 is so volatile and prone to ignition, it’s one of the few chemicals that requires instrumentation to be certified to the most extreme, ATEX Exd IIC T6, protection standard. It can also be used in safety instrumented systems to meet the tough SIL1 performance ratings.

Thanks to official ABB WirelessHart distributor, instrumentation specialist ICA Services’ partnership with ourselves, ICA was able to recommend our AT100 magnetostrictive level transmitter, which meets both these criteria, providing process signals which output to both our local and site monitoring systems and meeting our own internal requirement of SIL1-capable instrumentation. As such, Robinson Brothers has purchased four additional AT100 transmitters for use on its other CS2 process systems.

AT100 transmitters provide continuous level indication, and transmission of an analog and/or digital signal for monitoring or control. The unique design boosts the resolution of the device to more than 100 times greater than a conventional reed switch-type device.

For more information, email moreinstrumentation@gb.abb.com ref. ‘magnetostrictive level’ or visit www.abb.co.uk/measurement. Alternatively, for more about ICA Services and Robinsons Brothers, please visit www.icaservices.co.uk or www.robinsonbrothers.co.uk.

New in-situ monitor from ABB opens up expanded possibilities for laboratories and pilot plants

June 6, 2013

We are pleased to announce that ABB has now launched a new, dedicated in-situ reaction monitor for research laboratories and pilot plants in the chemical, petrochemical, pharmaceutical and biopharmaceutical industries.

The all new MB-Rx reaction monitor features a rugged Hastelloy ATR probe and an intuitive software interface, offering a fast and flexible solution for setting up a wide variety of experiment templates.

Providing a powerful tool for operators looking to obtain a real-time insight into chemical reaction dynamics, the innovative MB-Rx enables key parameters such as kinetics over different phases, reagent consumption and the synthesis of products and by-products to be assessed in real time.

Compact and easy to install, the MB-Rx can also be fitted inside crowded fumehoods, providing convenient access to reactors. A major benefit of the MB-Rx is its virtually maintenance-free design. Permanently aligned optics and a light source with an average lifespan of 10 years mean that the MB-Rx requires little servicing throughout its operational life, providing extended uptime and reducing the cost of ownership.

Further savings can also be achieved through the elimination of any consumables. The MB-Rx uses no hygroscopic optics or a cryogenic detector, ruling out the need for optical purging, desiccant cartridges, liquid nitrogen or Stirling coolers.

The MB-Rx reaction monitor is just part of our wider offering of process, emissions & laboratory analyzer products and systems for real-time analysis of the chemical composition and/or physical properties of a process sample or stream.

For more information about the new MB-Rx reaction monitor, please email moreinstrumentation@gb.abb.com or call 0870 600 6122 ref. ‘MB-Rx’.