Honeywell’s SmartLine® Guided Wave Radar Level meters use TDR (Time Delay Reflectometry) to measure distance, level, interface, volume, and mass. Higher signal dynamics and sharper pulse than conventional TDR devices ensure better performance.
What is it?
The SmartLine Guided Wave Radar Level Meter can measure the level of a wide range of liquid products in a variety of facilities within the indicated pressure and temperature range including LPG and LNG. It can be used in mixing tanks, distillation tanks, process tanks, separators, solid silos (inventory) and storage tanks. No calibration or commissioning required when installed. It can also be used for liquid interface level measurement.
It can measure the level and the interface simultaneously, since it has an optional second analog output. Finally, the level meter can measure powders and granules of materials with dielectric constants of 1.6 and even lower. A variety of rigid and flexible probes allow measurement in silos up to 35 m (115 ft) in height.
How does it work?
The TDR method uses low intensity electromagnetic pulses along a rigid or flexible conductor. These pulses move at the speed of light, and when they reach the surface of the product to be measured, they are reflected with an intensity that depends on the dielectric constant of the product (for example, the water has a high dielectric constant and reflects the Pulse of New to the meter converter at 80% of its original intensity). The device measures the time from when the pulse is transmitted until it is received. The time value is converted into an output current of 4-20 mA and / or a digital signal corresponding to the level.
What problems does it solve?
The SmartLine guided wave radar level meter is used in applications where level sensors may have been used with technologies such as capacitive, hydrostatic pressure or ultrasound. Immune to changes in conductivity, density, pressure and temperature, the level meter offers better reproducibility and accuracy. Since the signal travels up and down the probe, it is not affected by the angle of repose of a granular material.
