7 
Introduction (continued)  Step One 
 
 
REFLECTIVE TECHNOLOGY 
Condensation is the most common variable in liquid level applications.  Condensation attenuates the acoustic 
signal of ultrasonic sensors with horizontal transducers, weakening their signal strength and signal to noise 
ratio by up to 50%, and substantially reducing their measurement reliability.  At the core of Reflective 
Technology™ is a simple fact.  Unlike flat horizontal surfaces, significant water droplets cannot adhere to 
smooth vertical surfaces.  By orienting the transducer vertically, condensation runs off the transducer and does 
not affect sensor performance.  The unimpeded transmit and receive signals are redirected to and from the 
liquid off a 45º reflector, delivering reliable level measurement.   
FLAT TRANSDUCER  REFLECTIVE TRANSDUCER 
 
Signal Attenuation  Reliable Measurement