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URDH-L TyPe Continuous Wave Radar Level Gauge
2025-12-20
Product Introduction：
This type of radar level gauge is a frequency-modulated continuous-wave(FMCW)model, operating at a frequency of 80GHz. Compared with pulsedradar level gauges,it has a wider range of applications and offers advantagessuch as high accuracy, strong penetration, small beam angle, small lens an-tenna, and easy installation.
Principle ：
The general principle of the frequency-modulated continuous wave (FMCW)radar level gauge is that the radar emits electromagnetic waves downwardfrom the top of the tank. When the electromagnetic waves encounter the sur-face of the medium, they are reflected. The reflected waves are received bythe radar. The frequency difference 8f between the received signal and the transmitted signal is in a certain proportional relationship with the distanceR to the surface of the medium: R= C(speed) *8f (frequency difference)/2/K (frequency modulation slope). Since the speed of light C and the frequencymodulation slope K are known, as long as the frequency difference 8f is calcu-lated, the distance R from the radar installation position to the surface of thematerial can be obtained. Then,by subtracting the space distance from theradar to the material surface (referred to as the empty height) from the totalheight of the tank, the height of the material level can be obtained.
Radar level meters have the following characteristics:
Accuracy and resolution:
High accuracy (typically 2 mm to 20 mm level, depend-ing on the range and environment)
Output signal:
4-20 mA/HART, RS485/Modbus,pulse or switch quantity (dependingon configuration)
Process connection: Flange mounting(picture is of the flange type),threaded orclamp-style interface
Protection rating: Common protection ratings are IP66/67,suitable for harsh indus-trial environments
Process temperature/pressure: High-temperature and high-pressure resistant typesare available as options. The conventional type adapts to a wide temperature range(-40C to +80C depending on the model)
Advantages of the URDH-C type frequency-modulated continuous wave radar level meter:
Strong anti-interference capability:
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High accuracy and good repeatability:
Continuous wave/microwave rangingtechnology offers millimeter to centimeter level accuracy and stable repeatability,suitablefor process control and inventory management.
Penetrating/Small Blind Zone Design:
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Wide Range and Flexible Installation:
Itcan cover a wide range(from small ranges to tens of meters), and supports flange,threaded,or clamp installation,suitable forvarious tank types and working conditions.
Fast Response and Real-time Monitoring:Real- time output (4-20 mA,HART,RS485/Modbus,etc.)facilitates online monitoring and integration with process control systems
Low Maintenance and Long Service Life:No mechanical moving parts,good resistance to dirt,long maintenance intervals,and low long-term operating costs.