SSG-2 : Fluidless Snow Pillow for Ground Applications

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The SSG-2 Fluidless Snow Pillow (Snow Scale) is a precision Snow Water Equivalent measuring device which is developed for quick and easy installation and implementation in the field.

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Power supply

9...28 VDC; Reverse voltage protection, overvoltage protection

Power consumption at 12 VDC

max. 50 mA active

<1mA in sleep mode

Outputs

RS-485 SDI-12

Analog output 4…20 mA (14 bit, max. load 200 Ω)

Digital output (low: 0V, high: Vsupply, max. 30 mA at Vsupply-0.5 V)

Operating temperature

-40…60 °C (-40…140 °F)

Storage temperature

-40…60 °C (-40…140 °F)

Environmental humidity

0…100 %rH

Protection rating

IP 68

Lightning protection

Integrated protection against indirect lightning with a discharge capacity of 6 kA Ppp

Housing material

Aluminium

Size L x W x H

2800 x 2400 x 103 mm (110.24 x 94.49 x 4.06 inch)

Surface area

6.72 m²

Weight

110 kg (242.5 lb)

Max. inclination

5°

The SSG-2 Fluidless Snow Pillow (Snow Scale) is a precision Snow Water Equivalent measuring device which is developed for quick and easy installation and implementation in the field. A broad outer frame of plates minimizes the effects of ice bridging commonly experienced late in the measurement season. The use of lightweight aluminum materials minimizes thermal resistance improving heat flow throughout the device for better emulation of natural conditions.

The working principle of the SSG-2 is based on the measuring principle of load cells. The sensor con­sists of seven perforated plates, each plate measuring 31.44" x 47.16"(inches). The center panel and six surrounding panels allow water to percolate through the sensor. Water percolation minimizes thermal differences between the sen­sor and surrounding panels act to buffer the cen­ter panel, where SWE is measured, from stress concentrations that develop along the perime­ter of the sensor. This system allows accurate measurement even during periods of rapid snow settlement following large snow accumulations.