1. Principle: The radar level gauge uses electromagnetic waves (usually microwave or radio frequency) to measure the liquid level, while the guided wave radar level gauge uses a guided wave tube or rod to spread microwave signals to measure the liquid level.
2. Scope of application: Radar level gauge is widely used for measuring liquid, solid and powdery materials, while guided wave radar level gauge is mainly used for measuring liquids, especially liquids with high viscosity, corrosiveness or foam.
3. Accuracy: The guided wave radar level gauge usually has higher measurement accuracy than the traditional radar level gauge, especially under complex process conditions, such as bubbles, dust and steam in the liquid.
4. Installation requirements: The guided wave radar level gauge needs to be installed with a guided wave tube or rod, which may require a large installation space and specific installation requirements. In contrast, radar level gauges are usually easier to install and maintain.
5. Price: Guided wave radar level gauge is usually more expensive than radar level gauge.
To sum up, choosing the appropriate level gauge depends on the specific application scenarios and requirements. Guided wave radar level gauge may be a better choice if it is necessary to measure a variety of material types or requires high measurement accuracy. However, if a more general liquid level measuring device is needed, which is easy to install and maintain, radar liquid level gauge may be more suitable.