Sapcon’s SLA Series Admittance Level Switch consists of an evaluation unit, an electronic insert and a probe. The probe is mounted either from top or side of the vessel. The probe comprises of sense, shield electrode electrically isolated from the metallic tank by means of suitable insulator. The two electrodes form an imperfect capacitor with the service material as dielectric.
An accurate measurement of change in admittance affords an indirect measure of the level of material in the tank. The electronic insert measures this change accurately by using Radio Frequency (R.F.) technique coupled with coat immunizing circuitry. The change is converted to a DC voltage variation, which is transmitted to the evaluation unit via a 3core cable for further processing. The processed signal is used to energize or deenergize a relay whose output contacts are available for annunciation and/or control.
CE Marking, RoHS Compliance
Sapcon Admittance series level switch uses a three element immuno coat technology and uses precision rectifier to eliminate voltage of shield due to build-up of material. The Oscillator generates an AC voltage which drives a current through the capacitance influenced by the product. This AC current is transformed by a precision rectifier in to a DC current which is transmitted to the evaluation instrument and compared with a pre adjusted set value.
The shielded electrode is connected to the minus of the AC voltage, therefore in case adhesion, the current flows from the sensitive measuring part to the shielded electrode and not via precision rectifier. Only the capacitance between the sensitive measuring part and container wall cause a current through the precision rectifier.
Process Connection (Mounting Arrangement)
Wetted Parts and Mounting Material
Input Power Supply
Time Delay Settings