Snow Depth Sensor
Snow depth is the total depth of snow on the ground during a specified time. It is measured, because winter precipitation is stored in the snow pack and released latter in the year as snow melts. Snow depth must be coupled with snow density to determine the quantity of water being stored in the snowpack.
The Judd Communications ultrasonic depth sensor works by measuring the time required for an ultrasonic pulse to travel to and from the snow/soil surface. An integrated temperature probe provides an air temperature measurement for properly compensating for the speed of the acoustic signal An embedded micro-controller calculates a temperature compensated distance and performs an error checking routine. Both distance and air temperature are output digitally. Measurement errors are typically within a single centimeter.
We are currently migrating to the SCXL-MaxSonar sensor provided by Maxbotix.