Snow Scale SSG-20

Description

The SSG Snow Scale is a precision Snow-Water-Equivalent measuring device which is developed for quick and easy installation and implementation in the field. The SSG uses specially designed aluminium plates for SWE measurement which guarantee accurate measuring values. A broad frame of panel minimises the effects of ice bridging. The use of lightweight aluminium materials minimize thermal resistance improving heat flow throughout the device for better emulation of natural conditions. The SSG has an analogue 4 - 20 mA output. Therefore integration and connection to weather stations or other signal processing systems are kept easy and simple.

Function

The working principle of the SSG is based on the measuring principle of load cells. The sensor consists of seven perforated panels of a size of 80 x 120 cm each. The center panel and six surrounding panels allow water to percolate through the sensor. The perforated panels minimizes thermal differences between the sensor and the ground. The surrounding panels act to buffer the center panel, where the SWE is measured from stress concentrations which are developed along the perimeter of the sensor. This system allows accurate measurements even during periods of rapid

Installation Guide

The SSG is designed for modular and easy installation and maintenance in the field. The snow scale consists of an instrumented center panel surrounded by six panels that act to buffer the center panel from edge stress condition (Refer to Datasheet Figure 1). For the assembling an even underground is necessary. To avoid significant influence on the weight measurement a maximum inclination of 5° should not be exceeded. The snow scale can be sunk in the ground or mounted lying on the surface. The seven aluminium plates are simply screwed on a frame which consists of six flat profiles and two L-profiles. The SSG is supported by angle beams to provide strength and stiffness.