Microwave level gauge with remote transducer

A microwave level meter for measuring height of a product in a tank in a process application, comprising:

• a microwave antenna directed into the tank toward the product;
• an electronics housing spaced apart from the antenna at a position proximate a side of the tank;
• a microwave waveguide coupled to the electronics housing and antenna and having a length which changes based upon temperature;
• microwave transducing circuitry coupled to the waveguide for sending and receiving microwave signals;
• and
• measurement circuitry which measures height of the product and provides an output based upon a microwave echo from the product and a microwave echo generated proximate the antenna, wherein the output provided by the measurement circuitry is indicative of a difference between a first distance travelled by microwaves reflected from the product and thereby causing the microwave echo from the product and a second distance travelled by microwaves reflected proximate the antenna and thereby causing the microwave echo generated proximate the antenna such that the output provided by the measurement circuitry disregards length variations in the waveguide.