Radar Vs. Ultrasonic Level Transmitters: How To Choose The Right Solution?

1. Technology Comparison

Feature Radar Level Transmitter Ultrasonic Level Sensor

Principle Microwave reflection Sound wave reflection

Media Liquids/Solids/Interface Primarily liquids

Range 0~65cm 120cm (high precision) 0~15m (environment-sensitive)

Environment High temp/pressure/vapor/dust Not for vacuum/high temp

2. Key Differences

✅ Accuracy:

Radar: ±1mm (26GHz/80GHz models)

Ultrasonic: ±0.25%~0.5% FS (affected by temp/humidity)

✅ Extreme Conditions:

Radar: -40~1000°C / 3Mpa

Ultrasonic: -40~80°C / atmospheric pressure

✅ Interference Resistance:

Radar: Unaffected by foam/vapor/dust

Ultrasonic: Sensitive to airflow/humidity

3. Selection Guide

Choose Radar When:

High accuracy is critical (e.g., custody transfer)

Harsh conditions (high temp/pressure/corrosion)

Foam/vapor/turbulence exists

Choose Ultrasonic When:

Budget is limited for mild conditions (water tanks)

Media is non-volatile with stable temp/pressure