The rod-type guided wave radar level gauge is a contact-type level measurement instrument based on the time-domain reflectometry (TDR) principle. It transmits high-frequency microwave pulses through a rigid probe rod. When the pulse encounters the surface of the measured medium, it generates a reflection. By measuring the time difference between the transmission and the reflection, the liquid level height is precisely calculated.

• Range and Structure: The maximum range is usually no more than 6 meters, as longer probes are inconvenient for transportation and installation. It uses a rigid probe with a sturdy structure.
• Interference Resistance: The rigid probe concentrates energy and has extremely strong interference resistance. It is particularly suitable for applications with liquid surface fluctuations, foam, boiling, or stirring, effectively suppressing false echoes caused by steam, dust, and liquid surface fluctuations.
• Applicable Media: It can measure liquids, slurries, and solid particles with a dielectric constant of ≥1.4. It is especially suitable for measuring media with low viscosity and low adhesion (generally viscosity ≤500cst).
• Measurement Accuracy: High accuracy, typically <0.1%, with a resolution of up to 1mm and repeatability of approximately ±3mm.
• Installation and Maintenance: Installation is relatively simple, requiring the probe to be vertical and avoiding obstacles. Daily maintenance is minimal, but it is necessary to check for any adhesions on the probe.

To help you see more clearly the differences between it and the "cable brothers", I have compiled a comparison table:

• Process industry: Small storage tanks, reactors, separators, etc. in petrochemical, pharmaceutical, food and beverage industries.
• Complex working conditions: Suitable for environments where the liquid surface has stirring, fluctuation, foam, or where there is steam or dust inside the tank.
• Low dielectric constant liquids: For liquids with a low dielectric constant, a double probe measurement method can be adopted to improve measurement accuracy and reliability.

The rod-type guided wave radar level gauge, with its outstanding anti-interference ability, high precision and reliability brought by the rigid probe, has become the ideal choice for medium and small range, liquid surface fluctuation or complex working conditions such as the presence of foam.