CHEMICAL EQUIPMENT UPDATE 


Versatility key in level measurement technology


 The latest level measurement technologies can cope with dust, noise, strong air currents and corrosive atmospheres – while being robust, accurate and low- maintenance. Sean Ottewell reports.


 Les dernières technologies en matière de mesure de niveau résistent à la poussière, au bruit, aux forts courants d’air et aux environnements corrosifs tout en étant performantes, précises et sans grand entretien. Selon Sean Ottewell.


 Die neuesten Technologien zur Füllstandsmessung sind in staubigen und geräuschvollen Umgebungen, starken


Luftströmungen und korrosiven Atmosphären einsetzbar – und gleichzeitig robust, akkurat und wartungsarm. Sean Ottewell berichtet.


V


EGAPULS SR 68, VEGA’s new radar sensor for continuous measurement of bulk solids, is


especially suitable for level measurement in silos and bunkers with heights up to 30 metres. The company is well known for its


innovative level measurement technology and pragmatic solutions that offer the user many practical benefits. When the wish for a reliable level sensor for measuring ranges up to 30 metres arose, the company reacted quickly. Its tried and true radar technology was adapted once again to the requirements of users – a new sensor optimally covering applications in medium-height silos was the result. With its 30 metre measuring range,


VEGAPULS SR 68 is ideally suited for a wide variety of bulk solids applications and offers the user all the advantages of radar technology at a keen price. Uninfluenced by dust, noise and strong air currents during filling, the sensor reliably detects the level and contributes to profitable plant operation. Since even the weakest radar reflections from the surface of the bulk solid material can be detected, the sensor is employed in a broad range of applications. From plastic granulate to grain to coal – with VEGAPULS SR 68, reliable level measurement of any medium is guaranteed and fast product changes can be carried out easily without a fresh adjustment (Fig.1). The flexible sensor concept allows


individual adaptation to the respective requirements of the measuring point. Antenna covers are available for dust protection and rinsing connections for keeping the sensors free of sticky bulk material. Different antenna systems with process separators of plastic and ceramic make application possible in environments over 250°C and give the user the necessary measuring certainty for smooth operation of production systems. In another development, VEGA says


that its new VEGAPLUS WL 61 is the first radar level sensor developed especially for the water/sewage sector. Compared to classic measuring techniques, such as ultrasonic, this modern technology delivers far more reliable measurement data and has proven successful in everyday operation, says the company. The new radar sensor was conceived


especially for use in water management and 3 ECE


is a real alternative to the commonly used ultrasonic sensors, also with regard to price. Radar technology offers considerable


advantages over ultrasonics because it operates without being affected by temperature, wind, fog or rain. And the much higher accuracy of radar sensors makes a big difference in applications such as flow-rate measurement in open channels, where the measuring ranges are sometimes very small. The completely encapsulated cable and


robust housing of VEGAPULS WL 61 provide a high protection rating of IP 66/68 (1 bar). Thanks to the different mounting options the sensor can be easily integrated into existing infrastructure. VEGAPULS WL 61 is used primarily in


Fig. 1. Reliable level measurement and fast product changes can be carried out easily.


applications where users demand high precision and reliable function and previous solutions have not fulfilled all requirements. One application, somewhat apart


from classic level measurement, is level measurement of rivers. The small, light radar sensor, mounted on a jib, records the level of the water contactlessly. Compared with elaborate gauging pipes, the costs of installation and maintenance are very low. And unlike non-contact measurement with ultrasonic devices, radar is not influenced by changing temperatures, solar radiation or


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