In the Sitrans TO500, Siemens is putting an innovative measuring system for fibre optic temperature measurement onto the market. It enables complex temperature measurements and detection of the precise position of critical over temperatures, for example in tube and tube-bundle reactors. The Sitrans TO500 is characterised by a large number of measuring points (up to 48 per measuring lance, depending on the temperature range) and the small diameter of the sensor measuring lance. This allows the use of a smaller protective tube in the reactor, which makes measurements more accurate and so improves productivity and product quality. The precise determination of the temperature profile enables users to detect critical operating states in a timely manner, and initiate countermeasures. This lengthens the service lives of plants.
The measuring system is especially suitable for use in the chemical industry. The reliable determination of the temperature profile within the catalyst filling is of crucial importance in the catalytic conversion of gases and liquids in tube and tube-bundle reactors. It significantly affects the course of the reaction, the quality of the substance conversion and the aging process of the catalyst. The object is to detect areas with excessive temperatures (hotspots) at an early stage, and make adjustments if necessary, for example to optimise the reaction processes.
This is where the Sitrans TO500 comes in. For the first time it uses a fibre Bragg grating (FBG) for the measurements. The Sitrans TO500 can evaluate 48 FBGs in each of four channels (a total of 192 measuring points), thus enabling precise determination of temperature changes in the smallest spaces. Additionally, the device enables FBG-based measurements in industrial environments (i.e. under harsh plant conditions and at high temperatures). This new form of temperature measurement is now proven in the chemical industry.
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