Exhibitors score with analytical precision
15 Jan 2000
The Balston range of sample filters, being shown on stand A75 by Whatman International (enter 410 on enquiry card), is designed to give the best possible protection for on-line analysers while, at the same time, providing unaffected, representative samples.
Oil, water and dirt are filtered down to 0.01 micron, with a low pressure drop. The disposable self-sealing elements are said to be environmentally friendly.
New products include the A98 complete protection coalescing filter; the range of Quick Change filters, which allow element change without affecting the line connections; and the 15/8OS6 large capacity sample filter.
A new range of PTFE-bound elements is also available, as well as generators supplying gas for calibration or analyser purposes.
Servomex's (411) xendos 2700 combustion gas analyser, on stand E170, uses thick film calorimetry to give accurate measurements of the concentrations of combustibles, as well as a combustibles breakthrough indication. Stable and accurate minimum full scale measurements are 0 to 500ppm (v). Servomex says that this low level of measurement has not been available before, without the use of far more expensive equipment.
The xendos 2700 is less affected by cross interference from other background gases, like moisture and carbon dioxide, when compared with the various hot wire devices available. Xendos 2700 makes oxygen and combustible measurements in sample gas temperatures of up to 1800 C.
The instrument is for combustion control applications in power generation, process heaters and crackers, thermal oxidisers, incinerators, metals manufacture and cement production.
Oxygen can be measured to 0.01 ppm, and up to 100 per cent oxygen, using the latest microprocessor technology to be found in the series 900 range of oxygen analysers, shown by Systech Instruments (412) on stand P80.
There is a choice of models with options for panel or rack mounting, as well as a weatherproof model, conforming with IP66 protection, and complete with its own sample conditioning system. An RS232 communication port is fitted as standard, with an option of 4 to 20mA analogue outputs and programmable alarms.
A variety of sensors includes the new RACE, which is said to give rapid air purge from air down to trace levels of oxygen. It eliminates the long stabilisation time required with previous sensors. Operating temperatures range from below freezing to 50 C. Applications include the measurement of oxygen in all inert gases, and flammable gases, such as hydrogen and methane.
