Description: The Ultrasonic sensor is a low cost non-contact snow level sensor that measures the distance from the sensor to the snow level by sending a high-frequency pulse (typically between 20kHz to 200kHz), listening for the echo to return. Knowing the speed of sound, the sensor can determine the distance to the object. The reflected acoustic wave is received at the transducer, where it is converted into an electrical signal (analog or digital) and recorded by a data logger. The ultrasonic sensor pulse is transmitted in a cone (up to 22°) with a range of about 10m
Costs USD Lower: $500
Costs USD Upper: $1,500
Accessories: HS-L01
Advantages: meaning the sensor can never be further than 10m from the surface of the snow pack to make a reliable measurement. The ultrasonic sensor also has a dead zone which typically is between 30 and 45cm from the sensor. The dead zone is designed to prevent spurious reading from sensor ringing caused by the high amplitude pulse. Ultrasonic sensors are effected by air temperature and air density. Most manufacturers account for this through built in temperature compensation. Often ultrasonic sensors are mounted to mast or poles over the snowpack."
Disadvantages: Relatively inexpensive. Easy to install.
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