Guided Wave Radar Level Transmitter

Series 501E Guided Wave Radar (GWR) level transmitters are advanced, contact-based instruments used for continuous level and interface measurement of liquids and solids. Using Time Domain Reflectometry (TDR), they guide low-energy microwave pulses down a probe to the material surface, providing high accuracy, reliability, and immunity to changes in process density, pressure, temperature, or foaming conditions.

Guided wave radar transmitter works on the principle of time and travel (TDR). Radar wave travels at the velocity of light. The flying time is converted into level signal via the electronic components. The probe emits high frequency wave pulse which travels along a cable probe or a rod probe. When the wave pulse reaches the medium surface, it will be reflected and the returned pulses are received by the receiver, and then the distance signals will be converted into level signals. The reflected pulse signals travel along a probe rod or a probe cable and arrive at the electronic unit of the instrument, where the built-in microprocessor will process these signals there, recognize and pick up those real echoes which are reflected from the top surface of the measured medium. The recognition for real echoes is performed by the smart software. The flying distance of the signals from the top surface of the medium to the electronic unit is proportional to its flying time, represents the time of the whole route of the signals travelling (from the signals emitting surface to the top surface of the medium to the signals receiver (the same surface of the signal emission) is the velocity of the signals, it is equal to the velocity of light. A represents the height of the instrument mounting position (the height of the empty tank), it is a known number, and then, the level of the measured medium can be calculated.

crude oil, refined products, and liquefied gas in storage tanks, separators, and distillation columns, corrosive, acidic, or solvent-based substances in reactors and mixing tanks, boiler drums, lube oil tanks, and for, monitoring powder/solid levels in silos.