Continuous Wave Radar Level Gauge Without Direct Contact With The
Medium Continuous wave radar level gauge is a common liquid level
measurement instrument. It uses radar technology to emit continuous
microwave signals and calculates the liquid level by measuring the
intensity of the signal's echo. Product Advantages - Non-contact Measurement: The antenna does not come into contact
with the medium, making it suitable for corrosive,
high-temperature, high-pressure, viscous, and easily crystallizing
complex media.
- High Precision: The measurement accuracy is usually within ±1 to
3mm, far exceeding non-contact methods such as ultrasonic.
- Almost Unaffected by Working Conditions:
- Unaffected by Pressure and Temperature Changes: The speed of
electromagnetic wave propagation is hardly disturbed by these
factors.
- Unaffected by Changes in Gas Phase Medium Composition and Density:
A significant advantage over ultrasonic.
- Strong Resistance to Steam, Dust, and Foam: Especially
high-frequency (such as 26GHz, 80GHz) radars, with small beam
angles, concentrated energy, and stronger penetration.
- No Moving Parts, High Reliability, and Low Maintenance.
Comparison with Pulse Radar Level Gauges | Characteristics | Continuous Wave Radar | Pulse Radar |
|---|
| Working Principle | Transmits waves with continuously varying frequencies and measures
the frequency difference between the transmitted and received
waves. | Transmits short pulses and measures the time difference between the
transmitted and received waves. | | Signal Processing | Processed in the frequency domain, requiring high signal quality
and relatively complex circuits. | Processed in the time domain, with an intuitive principle and
relatively simple circuits. | | Accuracy | Extremely high. The accuracy of measuring the frequency difference
can be very high, so it is usually more accurate than pulse radar. | High, but may be slightly inferior to FMCW in measuring extremely
short distances or requiring extremely high accuracy. | | Dead Zone | Minimal or almost non-existent. As it is a continuous wave, it can
measure very short distances. | Has a certain dead zone (cannot measure near the antenna), as the
receiver needs to be turned off during pulse transmission. | | Cost | Usually higher (especially in high-frequency bands). | Usually lower, with good cost performance. | | Application Focus | Applications with extremely high requirements for accuracy and
reliability, such as trade settlement, fine chemicals, and small
container measurements. | Strong versatility, suitable for most industrial liquid and
material level measurements, and is one of the market mainstreams. |
Continuous wave radar level gauges, with their blind spot-free
feature, ultra-high precision and outstanding reliability, are the
"high-end" solution in industrial liquid level measurement.
Although their cost is usually higher than that of pulse radar,
they are the irreplaceable choice in demanding measurement points,
small containers or situations requiring extremely high measurement
stability, such as safety interlocks and trade handovers. |
