Best Radar & Ultrasonic Level Transmitters in 2026
Continuous level measurement keeps tanks, silos, and process vessels running safely and efficiently. Non-contact radar and ultrasonic level transmitters measure liquids and solids without touching the medium. This complete guide explains the technologies and compares the real Marmonix level transmitter models so you can choose the right one in 2026.
Radar vs Ultrasonic Level Measurement
Ultrasonic transmitters send sound pulses and time the echo; they are economical and reliable for clean liquids and open channels but can be affected by vapour, foam, and temperature. Radar (26 GHz) transmitters use microwaves, so they are largely immune to vapour, temperature, and pressure — ideal for demanding process conditions and longer ranges.
Key Specifications to Compare
- Technology: radar (26 GHz) or ultrasonic.
- Range (up to 70 m on Marmonix radar units).
- Medium: liquids, solids, foam, vapour.
- Contact vs non-contact mounting.
Marmonix Level Transmitters Compared
| Model | Technology | Range | Best for |
|---|---|---|---|
| MRL-3100 | 26 GHz radar | Up to 70 m | General process level |
| MRL-3300 | 26 GHz radar | Up to 70 m | Demanding liquids & solids |
| MRL-3500 | 26 GHz non-contact radar | Up to 70 m | Vapour/foam & harsh media |
| MLS-2204 | Ultrasonic | — | Economical clean-liquid level |
Model Strengths
MRL-3100, MRL-3300, and MRL-3500 — 26 GHz high-frequency radar transmitters measuring up to 70 m, largely immune to vapour, temperature, and pressure for reliable process-level measurement. MLS-2204 — an economical ultrasonic transmitter that times the pulse echo, well suited to clean liquids and open channels. Browse the Marmonix level measurement range.