Cape-11 RF Admittance Level Switch
Cape-11 RF Admittance Level Switch is a level meter for the level measurement of coal ash, fly ash and other powdery ashes. It possesses merits and benefits of other similar products on the market. Besides, Jiwei has developed innovative technology and processes to make Cape-11 more competitive and with great reliability and accuracy.
In Cape-11 RF series, a probe is designed to detect the change of capacitance and impedance between probe and vessel wall to realize level measurement and control. In its electronic unit, reactance between the measurement electrode and the wall of an empty vessel constitutes a balanced bridge circuit which outputs a stable oscillation signal. As the level rises, the measurement electrode is covered by the medium, and reactance between the electrode and the wall of the vessel changes. It causes an imbalance of the bridge circuit and stops the oscillation as a result. A post-circuit is designed to detect the change of output signal from the bridge circuit and generate an alarm signal. In addition, oscillation signal at radio frequency is not only applied to the measurement electrode but also applied to a shield pole through a 1: 1 voltage-follower, so measurement electrode and shield pole have the same electric potential, phase, and frequency, but these two electrodes are insulated from each other. Even if there is medium buildup on the probe, because there is no electric potential difference between measurement electrode and shield pole, the reactance change on shield pole has no effect on the detection of post-circuit. Therefore, only reactance change on the measurement electrode induced by the filled medium between the measurement electrode and the wall of the vessel will be detected by post-circuit. It eliminates the effect of medium buildup on level measurement.
Jiwei has developed innovative techniques, focused on details of manufacturing process, introduced strict process management and quality inspection to ensure Cape-11 with great reliability.
Compared with other similar products in the market, Cape-11 series have the following benefits:
● Strong flexibility, widely used for the level measurement of fly ash, solid granules and adhesive materials.
● With dual color LED indicator. The housing with electronic can be rotated to make the orientation of LED easy for long distance observation.
● Modular design with high reliability, easy installation and maintenance.
● Strong impact resistance with a stainless-steel protective sleeve assembled.
● Industry leading design for up to 450℃high process temperature endurance.
Cape-11 RF Admittance Level Switch series include 4 models (Standard, Guard, Rope and Ultra-high Temperature):
Cape-11A Standard: For level measurement of dust, coal ash and etc., with robust design, easy for installation and maintenance.
Cape-11P Guard: A stainless steel protective sleeve assembled on Cape-11 standard model to enhance impact resistance for heavy materials.
Cape-11R Rope: For large silos or containers, vertical installation can effectively avoid lateral material impaction.
Cape-11H Ultra-high Temperature: An advanced technology in industrial field. The probe is made of high temperature ceramic, can tolerate high process temperature up to 450℃.