User Manual

2-20 ADS TRITON+ Manual
Surface Combo Sensor
Ultrasonic Depth Sensor
This sensor first transmits an ultrasonic signal downward from one
of the crystals on the sensor face that bounces off the flow surface
and returns to the other crystal. T he monitor measures the travel
time elapsed between transmission and reception of the reflected
sound s i gnal. Based on the elapsed time and the speed of sound, the
monito r determines the range. The range represents the distance
between the sensor face and flow surface. The monito r calculates
the depth o f t he flow by subtracting the range from the pip e
diameter. It compensate s for the speed of sound in the air using the
temperatur e recorded by a temperature sensor housed within t he
ultra s onic d epth sens or.
The ultrasonic d e pth sensor is located in the front, horizontal
portion of the sensor and has two downward-facing ultrasoni c
crystals covered with a clear, moisture-she dding Teflo n
®
coating.