1. The watershed in industrial measurement: essential differences in physical principles

▶ ultrasonic level gauge

operating principle:Ranging is achieved by emitting sound wave pulses and receiving echoes, calculating the time difference

Applicable scenarios

Open or closed container (such as sewage treatment tank) with normal pressure, normal temperature and no strong interference

Core limitations

• Sound waves are susceptible to interference from medium density, temperature, steam, foam, etc.

• The measuring range is usually ≤15 meters, and the accuracy is significantly affected by environmental fluctuations.

▶ radar level gauge

operating principle:Emit high-frequency electromagnetic waves (6GHz/26GHz/80GHz) and calculate distance through changes in echo frequency

Technical advantages

• Strong microwave penetration: can penetrate dust, steam, foam (attenuation ≤30dB is still effective for measurement)

• No dependence on propagation media: can work stably in vacuum to high-pressure environments

2. Comparison of 6 key parameters: must-see hard indicators for model selection

(Data source: Doweston Laboratory Measurement Report DWS-2024-LLT003)