Guided Wave Radar Level Transmitter
  • Guided Wave Radar Level Transmitter
  • Guided Wave Radar Level Transmitter
  • Guided Wave Radar Level Transmitter
  • Guided Wave Radar Level Transmitter
  • Guided Wave Radar Level Transmitter

    • Radar Level Measurement

    Guided Wave Radar Level Transmitter

    Level sensor for continuous level measurement in liquids and solids with guided wave radar (GWR)

    Guided wave radar level transmitters use TDR (Time Domain Reflectometry) technology for continuous, contact-based measurement of liquids and solids. They can be fitted with cable, rod, or coaxial probes to suit different process conditions and require little to no maintenance.

    They work reliably even in environments with condensation, foam, buildup, crystallization, or steam. Each transmitter is built with millimeter-wave and waveguide technology optimized for industrial use, offering high accuracy and stable performance over time. They’re also suitable for measuring liquid interfaces and for conditions with heavy vapor or weak signal reflections. Thanks to their advanced signal processing, these level sensors stay accurate even in complex applications. The nonlinear output function can convert radar signals into useful data such as volume, weight, or flow for easy system integration.

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    Parameters
    • Measured Variable Level and interface level
    • Measuring Range 0.15–6 m (rod or coaxial probe) / 0.15–30 m (cable probe)
    • Minimum Dielectric Constant ≥ 1.6
    • Minimum Interface Thickness > 50 mm
    • Ambient Temperature −40 °C to +80 °C
    • Response Time ≤ 3 s
    • Measuring Accuracy Surface level ±3 mm / Interface level ±3 mm
    • Process Connection G¾ thread / Flange ≥ DN25
    • Process Pressure −100 to 4000 kPa
    • Power Supply 12–28 V DC
    • Signal Output 4–20 mA HART
    • Protection Rating IP66 / IP67
    • Explosion Protection Ex ia ⅡC T6 Ga
    • Communication Interface 4–20 mA / HART / RS485 / TTL / FDT / DTM
    • Process Temperature −40 °C to +200 °C
    • Dimensions (L × W × H) 123 × 100 × 254 mm
    • Weight Approx. 2 kg
    Dimension Diagram
    Dimension Diagram
    Features
    • Comprehensive Certifications
      Guided wave radar level transmitters support HART 7.0 and the FDT/DTM framework, which allows easy connection and stable communication with control systems.
    • Flexible Data Output
      After calibration, the transmitters can be set to output different process values such as level, volume, weight, or flow, depending on the application needs.
    • High Accuracy and Stable Performance
      Provide contact-based level and interface measurement with ±2 mm accuracy. The blind zone is small, less than 10 cm at the top and about 1 cm at the bottom for liquids, so it can still measure precisely even in small tanks.
    • Interface Measurement
      Equipped with specialized chips, optimized antennas, and smart signal processing, the transmitters can accurately measure the interface between two immiscible liquids.
    • Adaptable to Various Process Conditions
      Available with cable, rod, or coaxial probes and different wetted material options. Works well with liquids and solids in industries such as chemical, petrochemical, pharmaceutical, steel, energy, environmental protection, and shipbuilding.
    Optional Products
    Industrial tank-side level display, GPB80

    Industrial tank-side level display
    GPB80

    Guided Wave Radar Level Measurement Module

    Guided Wave Radar Level Measurement Module
    Videos
    Assembly instruction of guided wave radar level transmitter
    Assembly instruction of guided wave radar level transmitter
    Calibration of guided wave radar level transmitter at factory
    Calibration of guided wave radar level transmitter at factory
    Applications
    Steel Industry

    Steel Industry
    Used in high-temperature and high-pressure processes for measuring molten metal levels with precision and stability.

    Chemical Industry

    Chemical Industry
    Suitable for monitoring liquid and solid levels under general process conditions, providing accurate readings in tanks and silos.

    Energy Industry

    Energy Industry
    Works reliably in extreme temperature and pressure environments to measure the level of high-temperature combustion materials.

    Petroleum Industry

    Petroleum Industry
    Works well in tanks containing stirred, corrosive, or vapor-filled liquids. The radar signal can pass through foam, steam, or floating roofs to detect the real level of crude oil or similar products.

    Food Industry

    Food Industry
    Fits standard temperature and pressure conditions, ideal for slightly corrosive or vapor-prone liquids, and ensures stable measurement even in small-capacity tanks.

    Feed Industry

    Feed Industry
    Measures the level of granular materials and powders, and controls liquid additives in feed mixing and production systems.

    Cement Industry

    Cement Industry (slurry and liquid processes)
    Used in medium-temperature or pressure processes with stirring or mild corrosion, measuring the level of cement slurry and high-temperature materials in storage tanks.

    Pharmaceutical Industry

    Pharmaceutical Industry
    Works in processes involving stirred or corrosive liquids and vapor, monitoring the level of liquid ingredients and powdered materials with precision.
      1. Guided Wave Radar Level Measurement Module
      2. Guided Wave Radar Level Measurement Module
        Measured Variable
        Level and interface level
        Measuring Range
        0.15–6 m (rod or coaxial probe) / 0.15–30 m (cable probe)
      3. Guided wave radar measurement modules are used in level transmitters for liquids and solids. They work based on TDR (Time Domain Reflectometry) technology and can be combined with cable, rod, or coaxial probes to provide continuous and low-maintenance measurement.
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    Other Radar Sensors

    Guided wave radar level transmitters can be equipped with metal rods or cables designed to withstand high temperatures and pressure, as well as corrosion-resistant probes made from materials like 316L stainless steel or Hastelloy. The measuring signal travels directly through the waveguide, so it isn’t affected by steam or corrosive gases in the environment. This design keeps the measurement stable and accurate even in demanding environments, where high temperatures, pressure, or corrosive gases would normally affect other types of sensors.

    Guided wave radar transmitters provide more stable readings because the signal travels directly through the probe that’s in contact with the medium. Foam or vapor doesn’t interfere with the measurement, so the readings stay consistent. FMCW (Frequency Modulated Continuous Wave) radars don’t make direct contact with the medium, so their signal can be affected by foam or steam. When this happens, the readings may become slightly less stable or show small variations.

    In liquids that contain gas, guided wave radar transmitters stay accurate thanks to automatic compensation that adjusts for signal interference. In thicker or highly viscous liquids, material can build up on the probe over time, which may affect the measurement accuracy. To keep the readings consistent and reliable, the probe should be cleaned regularly, and the sensor needs to be properly maintained to ensure stable performance in the long run.