ABB LWT310 vs LWT320 Guided Wave Radar Level Transmitters

ABB LWT310 and LWT320 are guided wave radar level transmitters in the LWT300 series. They measure level by sending electromagnetic pulses along a probe and evaluating the reflected signal from the material surface.

Both models can be used in industrial level measurement, but their probe dimensions, process interfaces, and mechanical capabilities differ. These details matter when selecting a transmitter for a storage tank, process vessel, or solids-handling application.

The main difference is the mechanical design of the probe and process interface. The LWT310 uses a smaller threaded interface and slimmer probe options, while the LWT320 has a larger threaded interface and stronger probes for applications involving greater mechanical pull forces.

Both models are also available with flanged connections. The complete order code determines the actual process connection, probe type, material, output, and other options.

The LWT310 is worth evaluating for liquid level measurement where its probe design, process connection, and operating limits meet the application requirements. Its coaxial probe option may also be useful in suitable installations where the probe configuration is appropriate.

The ABB LWT320 is specifically recommended for solids applications in the manufacturer's reference documentation because it can withstand a higher pull force. This can be important where the probe is exposed to mechanical loading from bulk material.

However, model selection should not be based on whether the material is simply a liquid or a solid. Vessel geometry, probe length, material properties, mechanical loading, process temperature, pressure, and installation clearances also need to be considered.

Guided wave radar performance depends on selecting a suitable probe for the vessel and material. Before ordering, check:

• Required measurement range and probe length

• Cable, rod, or coaxial probe requirements

• Process connection size and vessel opening

• Material compatibility with the measured medium

• Potential contact with internal structures

• Process pressure and temperature limits

• Required output and communication protocol

For solids, pay particular attention to mechanical forces on the probe. For liquids, assess the vessel geometry, internal obstructions, and whether the chosen probe configuration is suitable for the process.

For industrial level measurement, the ABB LWT300 series can be evaluated alongside other guided wave radar transmitters and non-contact radar level instruments. The choice depends on the material, vessel design, installation constraints, and required measurement performance.

When requesting a quotation for an LWT310 or LWT320, provide the complete model code, probe type and length, process connection, medium, operating temperature and pressure, and required communication output. This allows the supplier to verify the correct configuration rather than quoting by model number alone.

ABB LWT310 and LWT320 share the same guided wave radar measurement principle but differ in their process interfaces and probe strength. The LWT310 offers smaller-interface options, while the LWT320 is recommended for solids applications requiring greater resistance to probe pull forces.

The correct choice should be based on the actual mechanical and process conditions, with the complete model code verified against ABB's technical documentation.

Suggested RFQ information: Medium, measurement range, probe type and length, vessel connection, operating pressure and temperature, required output, and complete model code.