This measurement method provides direct, accurate and highly reliable continuous level measurement and level detection in almost any media - regardless of changing process conditions (such as density, conductivity, temperature, pressure, humidity and dust). The sensor can be used in small tanks as well as in large silos or in small or large nozzles.
- Combined precise level measurement and reliable level detection in one device
- Fast response time of 0.5 sec
- Suitable for liquids and powdery solids
- No influences due to fittings in the tank
For this purpose, electromagnetic pulses of high frequency but low energy, are guided along a conductive probe, which is immersed in the medium to be measured. When these pulses hit the surface of the liquids or solids, portions of the pulse energy are reflected back across the probe. The electronics calculates the level based on the time difference between the transmitted and reflected pulses. The sensor can provide the level as a continuous gauge over the analog output or convert the reading to a freely positionable switch output. The abbreviation TDR stands for the English name of the measurement method: "Time Domain Reflectometry".