RF Admittance Switch
Working Principle
RF admittance switch is a device used for detecting the presence of liquid level or material. Its operation principle is based on RF admittance technology. This switch comprises transmitting electrodes and receiving electrodes, forming a capacitor between them. When a medium (such as liquid or solid material) contacts the sensor, the dielectric constant of the medium affects the capacitance value, thereby altering the characteristics of the RF admittance signal.
However, in practical applications, variations in the medium may cause measurement errors, such as changes in medium properties or temperature. To address this issue, the probe of the RF admittance switch typically integrates a Null-KoTeTM circuit. The Null-KoTeTM circuit is a specially designed circuit aimed at eliminating or reducing the impact of medium variations on measurement results. By using compensation components, filters, or adjusting devices, the Null-KoTeTM circuit can correct or offset interference in the probe signal, thereby improving measurement accuracy and stability.
Product Advantages
1. Anti-adhesion Capability: Utilizes a patented anti-adhesion circuit to eliminate false signals caused by material adhesion.
2. Wide Applicability: The RF admittance switch is suitable for measuring liquids, solids, and powdery materials, making it applicable in various industrial environments such as chemical, food processing, and pharmaceutical industries. The probe and controller do not require cable connection, facilitating maintenance.
3. High and Low Temperature Resistance: It can withstand environments ranging from -184°C to +280°C.
Technical Parameters
l Product Name: RF Admittance Switch
l Product Series: JC-62K
l Antenna Types: Cable, Rod, Plate
l Antenna Materials: PTFE, 304 Stainless Steel, 316 Stainless Steel, Ceramic
l Time Delay: 030
l Power Supply: 24VDC, 220VAC
l Signal Output: Two sets of normally open and normally closed contacts
l Process Temperature: -40+850°C
l Process Pressure: -0.1~10MPa
l Fault Alarm: Upper Limit, Lower Limit
l Electrical Interface: M20×1.5
l Process Connection: Threaded, Bracket, Flange (optional)
l Protection Level: IP67
l Explosion-proof Rating: Exdb II CT6 Gb
