RF Admittance Level Meter and Radar Level Meter for different application areas
The frequency admittance level meter emits a certain high frequency radio wave on the probe to analyze and determine the change of the level in the container. The radio frequency admittance level meter changes the frequency of the detected material, and the frequency of the radio wave also changes.
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One: RF admittance level meter analysis
1, the working principle of the RF admittance level meter
The RF admittance level meter emits a certain amount of high frequency radio waves on the probe to analyze and determine the change in the level of the container. The radio frequency admittance level meter changes the frequency of the detected material, and the frequency of the radio wave also changes. The probe and the vessel wall of the RF admittance level gauge form a two-stage capacitor with a fixed spacing. The insulating material of the probe and the surrounding air provide an insulating medium. When the air is replaced by other media, the capacitance of the probe and the walls of the vessel will change, and this change will cause a change in the radio waves acting on the RF admittance level probe. This change is detected by the internal line of the RF admittance level meter and compared to the set value to determine the amount of change. When it is the same as the set value, the switching amount signal is output.
2. Technical advantages of RF admittance level meter
The probe of the RF admittance level meter can be applied to dust and solid particulate matter, and provides high sensitivity, stability and durability for liquid and mud effects. High sensitivity and anti-hanging.
3, RF admittance level meter for occasions
RF admittance level gauges are widely used, and several typical occasions are as follows: chemical plastic film; feed/cereal rubber drug; liquid waste water sand; food mud cement; powder coating/clothing coal; granular solid oil pulp.
Two: guided wave radar level gauge analysis
1. Working principle of guided wave radar level gauge
The guided wave radar level gauge is a radar level gauge based on the time domain reflection principle (TDR). The electromagnetic pulse of the radar level gauge propagates along the wire rope or probe at the speed of light. When encountering the surface of the measured medium, the radar Part of the pulse of the level meter is reflected to form an echo and returns to the pulse emitting device along the same path. The distance between the emitting device and the surface of the measured medium is proportional to the propagation time of the pulse therebetween, and the liquid level is calculated.
2. Technical advantages of guided wave radar level gauge
The radar level gauge measures the continuous level of liquid, particles and slurry. Measurements are not affected by changes in the medium, temperature changes, inert gases and vapors, dust, foam, and the like. The radar level gauge has an accuracy of 5mm, a range of 30 meters, a high temperature of 250 degrees, and a high pressure of 40 kilograms.
3. Scope of application of guided wave radar level gauge
The radar level gauge is suitable for acid-base storage tanks, slurry storage tanks, solid particles and small oil storage tanks in explosion hazardous areas. All kinds of conductive, non-conductive media, corrosive media. Such as coal bunkers, ash silos, oil tanks, acid tanks, etc.
Huajiang Automation can provide you with the most professional selection suggestions and the most reliable instruments. If you have any questions, we will have professional technicians to help you answer them. I hope to help you!
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