Guided Wave Radar Level transmitter

Accurate, Stable, Contactless Level Measurement for Complex Industrial Media
Our Guided Wave Radar Level Transmitter is engineered for plants that need stable, repeatable level measurement regardless of changing process conditions. Instead of relying on free-space radar, it directs the microwave pulses along a guided probe—either a cable, rod, or coaxial tube—to ensure clean, dependable echo signals even when the tank contains vapor, foam, turbulence, low-dielectric liquids, or internal obstructions.
This guided-wave design provides exceptional measurement stability, especially in applications where free-space radar may struggle: narrow tanks, agitation, low DK liquids, variable conductivity, or heavy buildup environments. Because the measurement is guided, reflections remain consistent, making it a trusted solution for chemical processing, storage tanks, corrosive media, water treatment, silos, and pressurized vessels.
Built to handle high temperature, high pressure, low dielectric media, and dusty solids, it gives procurement engineers a robust, low-maintenance level transmitter that performs reliably with fewer installation constraints and less need for recalibration over time.
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  • High-frequency 26 GHz radar: Concentrated beam angle cuts through vapor, dust, and tank obstructions—ensuring stable signals and reliable readings.

  • True non-contact measurement: No moving parts and no contact with the medium means less maintenance, no corrosion risk, and long-term measurement stability.

  • Multiple antenna designs for every application: Rod, cone, horn, and PTFE-shielded antennas support corrosive liquids, high-viscosity media, powders, and bulk solids.

  • Short blind zone: Ideal for small storage tanks and applications requiring high accuracy near the upper range.

  • Wide measurement range: From compact 10-meter vessels to tall silos up to 80 m, one platform covers nearly all level measurement needs.

  • Advanced echo processing: Smart signal interpretation separates real echoes from noise—improving reliability in dust, foam, and turbulence.

  • Built for harsh process conditions: Options support high temperatures, high pressure, heavy dust, condensation, and corrosive atmospheres.

  • Flexible installation options: Threaded or flanged connections available; fits metal or non-metal tanks without modifications.

  • Universal communication compatibility: Standard 4–20 mA, HART, and Modbus outputs integrate easily with existing control systems and PLC/DCS networks.

  • Explosion-proof and high-protection housing: Certified models allow safe use in hazardous or classified areas with gas, vapor, or dust.

General Performance

  • Technology: Guided Wave Radar (TDR)

  • Frequency: 100 MHz – 1.8 GHz

  • Measurement Range:

    • Cable probe: up to 30 m

    • Rod / coaxial probe: up to 6 m

  • Repeatability: ±3 mm (rod/coaxial), ±10 mm (cable)

  • Resolution: 1 mm

  • Response speed: ~0.2 s

  • Output: 4–20 mA / HART

  • Probe types: Single cable, double cable, single rod, coaxial tube

  • Dielectric constant: Works with εr ≥ 1.4

Process Conditions

  • Process temperature:

    • Standard: –40 to +130 °C

    • High-temperature: up to +250 °C (some models up to +400 °C)

  • Process pressure: –1 to 40 bar

  • Protection: IP65–IP68 housing

  • Power: 24 V DC (two-wire or four-wire), 220 V AC (four-wire)

Explosion-Proof Certifications

  • Ex ia IIC T6 Ga (intrinsically safe)

  • Ex d[ia] IIC T6 Gb (explosion-proof)

➤ RD701 — General Purpose Liquids & Solids (Single cable or single rod)

  • Measuring range: up to 30 m (cable), 6 m (rod)

  • Accuracy: ±10 mm

  • Process temp: –40 to +250 °C

  • Best for: general liquids, process tanks, basic solid applications

  • Applications: water, oils, fuels, solvents, powders, grains

➤ RD702 — Corrosive Medium Measurement (Full PTFE sealing cable/rod)

  • Measuring range: 20 m

  • Accuracy: ±10 mm

  • Temp: –40 to +200 °C

  • Best for: acids, bases, chemical solvents, aggressive liquids

  • Applications: chemical plants, acid/alkali tanks, corrosive process vessels

➤ RD703 — Solid Powder Measurement (Double cable)

  • Measuring range: 30 m

  • Accuracy: ±10 mm

  • Temp: –40 to +150 °C

  • Best for: powders with dust, aeration, or bridging

  • Applications: cement silos, ash bins, limestone, grain silos

➤ RD704 — Low Dielectric / Difficult Liquids (Coaxial tube)

  • Measuring range: 6 m

  • Accuracy: ±5 mm

  • Temp: –40 to +250 °C

  • Best for: low εr liquids

  • Applications: deionized water, condensate, deoxygenated water, solvents

➤ RD705 — High Temperature & High Pressure (Single cable/rod)

  • Measuring range: 15 m

  • Temp: –40 to +400 °C

  • Pressure: up to 40 MPa

  • Best for: sealed tanks, reactors, HP/HT processes

  • Applications: high-pressure boilers, chemical reactors, high-temp liquids

Liquids

  • Water, condensate, DI water

  • Hydrocarbons, oils, fuels

  • Acids, alkalis, corrosive chemicals

  • Food-grade liquids

  • Coating materials, solvents, additives

Solids / Powders

  • Plastic pellets, resin granules

  • Cement, sand, minerals, ore

  • Grain, feed, agricultural products

  • Fly ash, coal powder

  • Limestone, gypsum

Challenging Environments

  • Steam-filled vessels

  • Heavy condensation

  • Tanks with internal obstructions

  • Vessels requiring foam suppression

  • Low dielectric materials

  • Tall or narrow vessels

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