RF Capacitance Level Transmitter
Working Principle
RF Capacitance Level Transmitter is an instrument used for measuring the level of liquid or solid materials, utilizing radio frequency capacitance technology. It typically consists of one or more transmitting electrodes and one receiving electrode, forming a capacitor between them. When the medium (such as liquid or solid material) comes into contact with the sensor, its dielectric constant affects the value of the capacitance, thereby altering the characteristics of the radio frequency signal.
The dielectric constant is a physical quantity of the medium, indicating its capacitance properties relative to vacuum. For RF Capacitance Level Transmitters, the dielectric constant of the medium is crucial for the capacitance value. Generally, the higher the dielectric constant of the medium, the larger the capacitance value of the level transmitter, and vice versa.
Therefore, RF Capacitance Level Transmitters determine the level by measuring the change in capacitance value. By utilizing the relationship between the dielectric constant of the medium and the capacitance value, the position of the level can be accurately calculated.
Product Advantages
1. Compact structure, small size, easy installation and maintenance.
2. Multiple signal output options for convenient integration with different systems.
3. Polytetrafluoroethylene (PTFE) probe, resistant to strong corrosive liquids and high temperatures.
4. The measurement part submerged in the liquid has only one PTFE soft wire or PTFE rod probe as the sensor, ensuring high reliability.
5. Fully sealed aluminum alloy housing and stainless steel connectors.
6. Measurement on high-temperature pressure vessels is as simple as under normal conditions, and the measurement value is not affected by the temperature, density, shape, or pressure of the liquid being measured.
7. Various circuit structures with isolation between measurement/output and measurement/output/power supply terminals, built-in isolators to accommodate different signal grounding methods.
8. Comprehensive overcurrent, overvoltage, and reverse polarity protection.
Technical Parameters
l Product Name: RF Capacitance Level Transmitter
l Product Series: JC-BUS640
l Antenna Types: Rod Type, Cable Type
l Antenna Materials: PTFE, 304, 316
l Measurement Range: 3m, 30m
l Measurement Accuracy: 0.02% ~ 1.0%F.S
l Power Supply: 24VDC
l Signal Output: 4-20mA, HART, Modbus
l Process Temperature: -40~ +200°C
l Process Pressure: -0.1 ~ 10MPa
l Process Connection: Threaded, Flanged (optional)
l Protection Level: IP65, IP67, IP68 (optional)
l Explosion-proof Rating: Exd II CT6 Gb
