Guided Wave Radar Level Transmitter
Radar Level Measurement
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.
- 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
- 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.
Industrial tank-side level display
GPB80
Guided Wave Radar Level Measurement Module
Steel Industry
Used in high-temperature and high-pressure processes for measuring molten metal levels with precision and stability.
Chemical Industry
Suitable for monitoring liquid and solid levels under general process conditions, providing accurate readings in tanks and silos.
Energy Industry
Works reliably in extreme temperature and pressure environments to measure the level of high-temperature combustion materials.
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
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
Measures the level of granular materials and powders, and controls liquid additives in feed mixing and production systems.
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
Works in processes involving stirred or corrosive liquids and vapor, monitoring the level of liquid ingredients and powdered materials with precision.
