Learning Center
How does Time of Flight technology work?
Non-contacting pulse radar sends out a microwave signal that bounces off the product surface and returns to the sensor. The transmitter measures the time delay between the transmitted and received echo signal and the on-board microprocessor calculates the distance to the liquid surface using the formula:
Distance = (Speed of light x time delay) / 2
Once the transmitter is programmed with the tank reference height of the application – usually the bottom of the tank or chamber – the liquid level is calculated by the microprocessor.
Level = Tank Height – Distance
How does Time-domain reflectometry technology work?
High frequency microwave send out a microwave signal that is guided along a steel cable or rod. When they reach the product surface, the microwave pulses are reflected and received by the processing electronics. Level distance is directly proportional to the flight time of the pulse.
Distance = (Speed of light x time delay) / 2
Once the transmitter is programmed with the tank reference height of the application – usually the bottom of the tank or chamber – the liquid level is calculated by the microprocessor.
Level = Tank Height – Distance
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