The peak microwave power of most process radar level transmitter is less than a milliWatt. This level of
power is sufficient for tanks and silos of 40 metres or more.
An increase in the microwave power will produce higher amplitude echoes. It adversely will produce
higher amplitude false echoes and ringing noise as well as a higher amplitude echoes off the product
surface. The average required power depends on the pulse duration and pulse repetition frequency of
pulse radar transmitters.
The low power output from microwave radar transmitter means it is an extremely safe method of level
measurement.