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Transmitters provide continuous level measurement... MTS Systems Corp. Sensors Division isproviding its magnetostrictive Level Plus® transmitters to provide continuous level measurement in storage tanks,reactors, and process tanks. |
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| In a magnetostrictive sensor, a sonic strain pulse is induced in a speciallydesigned waveguide by the momentary interaction of two magnetic fields. Onefield comes from a movable permanent magnet, which passes along the outsideof the sensor tube, while the other field comes from an interrogation pulseapplied along the waveguide. The interaction of the two magnetic fieldsproduces a strain pulse, which travels at sonic speed along the waveguideuntil the pulse is detected at the head of the sensor. The position of themagnet is determined with high precision by measuring the elapsed timebetween the application of the interrogation pulse and the arrival of theresulting strain pulse. Consequently, accurate non-contact, liquid-levelsensing is achieved with absolutely no wear to the sensing components. The MG and MR transmitters monitor the product, interface, and temperatureall from a single process opening. Both are I.S.- and XP-approved. TheMG's output can be Modbus, Foundation Fieldbus, or DDA, a proprietaryASCII-based protocol. The Modbus and Foundation Fieldbus protocols providevolume measurement with the usage of up to 100-point strapping tables andtemperature correction according to API standards. The output for the MR isone or two 4-20 mA loops with HART. The MG and MR are available in lengths up to 300 inches in a rigid stainlesssteel pipe or with 3A-approved sanitary pipes. Both are also available in astainless steel flexible hose, up to 480 inches long for the MR and up to720 inches long for the MG. |
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