Explanation of the criteria for classification and numbering of components     C53.1.03
(JUN 00)
Explanation of the dates on the component's description



1.   Purpose and objectives

     To measure snow depth without contacting the snow surface.

2.   Description

     The Acoustic Snow Depth Gauge utilizes a transmitter-receiver that operates on an ultrasonic wave reflection method. As a result, snow depth can be measured without actually coming into contact with the snow.

     The snow depth gauge supplies snow accumulation information for purposes such as weather reports, traffic control and water management purposes. Depths up to 5m can be measured.

3.   Input

     Actual snow depth.

4.   Output

     The snow depth on a digital data display, as a digital signal (BCD) or an analog signal (0V-5V DC and 4mV-20mV DC).

5.   Operational requirements and restrictions

     The instruments must be installed on an open flat site, clear of obstructions.

6.   Form of presentation

     A catalogue and instrument specifications are available.

7.   Operational experience

     About 50 sets were installed in Japan in 1999.

8.   Originator and technical support

     Yokogawa Denshikiki Co.,Ltd.

9.   Availability

     From the HOMS National Reference Centre for Japan.

10.  Conditions on use

     Hardware is for sale.


(First entered: 01 FEB 93

Last updated: 21 APR 00)