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Contact level measurement in sanitary processes
Accurate liquid level measurement is crucial for the monitoring and control of batch and continuous chemical process applications. There are several methods of liquid level measurement available in the market today. Three that are relevant for high-purity applications employ radar, pressure and magnetostriction. Radar and pressure are noncontacting-type measurement options. By contrast, magnetostriction requires direct contact in the fluid being monitored. Typical magnetostrictive level sensors are able to measure product level, interface level and temperature, simultaneously if desired. The device, which measures the distance between a float magnet and the electronic head of a sensing rod, includes a float magnet, waveguide, pickup and electronics module. The two most important concerns for processing engineers considering magnetostrictive sensing technology are: the float's ability to measure accuratelyy in foamy or agitated processes; the cleanability of sensor components (float and pipe) to sanitary standards. Magnetostrictive technology offers many advantages over competing level sensing technologies. It provides high repeatability and accuracy. High quality sensors operate in process temperatures from -40 to +125 deg C with multipoint digital temperature outputs. Many digital sensors will compute additional process parameters during processing, such as gross volume, net volume, mass and alarms. Magnetostrictive sensors are easy to install. This simplicity is convenient for upgrades to existing tanks using older mechanical, capacitance or radar technologies. The float-based gage is not affected by changes in dielectric constant, nor changes in atmospheric condition (vapor); and it detects only the liquid level, not the foam levels. Magnetostrictive level sensors do not require recalibration in thr event of power outages or other plant disturbances. In addition, they are attractive for measuring cleaning solutions and water for injection (WFI). The sensors meet 3-A sanitary standards and are cleanable to clean-in-place (CIP) and sterilization-in-place (SIP) standards. All these features, coupled with ease of installation, multiple added functions and flexibility in design, make magnetostrictive sensors an excellent choice for chemical and pharmaceutical processing.
Contact level measurement in sanitary processes
Accurate liquid level measurement is crucial for the monitoring and control of batch and continuous chemical process applications. There are several methods of liquid level measurement available in the market today. Three that are relevant for high-purity applications employ radar, pressure and magnetostriction. Radar and pressure are noncontacting-type measurement options. By contrast, magnetostriction requires direct contact in the fluid being monitored. Typical magnetostrictive level sensors are able to measure product level, interface level and temperature, simultaneously if desired. The device, which measures the distance between a float magnet and the electronic head of a sensing rod, includes a float magnet, waveguide, pickup and electronics module. The two most important concerns for processing engineers considering magnetostrictive sensing technology are: the float's ability to measure accuratelyy in foamy or agitated processes; the cleanability of sensor components (float and pipe) to sanitary standards. Magnetostrictive technology offers many advantages over competing level sensing technologies. It provides high repeatability and accuracy. High quality sensors operate in process temperatures from -40 to +125 deg C with multipoint digital temperature outputs. Many digital sensors will compute additional process parameters during processing, such as gross volume, net volume, mass and alarms. Magnetostrictive sensors are easy to install. This simplicity is convenient for upgrades to existing tanks using older mechanical, capacitance or radar technologies. The float-based gage is not affected by changes in dielectric constant, nor changes in atmospheric condition (vapor); and it detects only the liquid level, not the foam levels. Magnetostrictive level sensors do not require recalibration in thr event of power outages or other plant disturbances. In addition, they are attractive for measuring cleaning solutions and water for injection (WFI). The sensors meet 3-A sanitary standards and are cleanable to clean-in-place (CIP) and sterilization-in-place (SIP) standards. All these features, coupled with ease of installation, multiple added functions and flexibility in design, make magnetostrictive sensors an excellent choice for chemical and pharmaceutical processing.
Contact level measurement in sanitary processes
Flüssigkeitsniveau-Kontaktmessung bei Sanitärprozessen
Totten, A. (Autor:in)
Chemical Engineering, New York ; 110 ; 48-49
2003
2 Seiten, 3 Bilder, 3 Quellen
Aufsatz (Zeitschrift)
Englisch
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