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Make:  Sommer        Model: SSG-2
✅ Environmentally friendly: no antifreeze liquid needed.
✅ Perforated plates: optimal thermal flow between ground and sensor and melt water run-off
✅ Stable, durable aluminium construction
✅ No preparation of the measuring site is necessary
✅ Easy system integration
✅ Many interfaces: SDI-12, RS-485 (ASCII and MODBUS, 4-20mA


The snow scales SSG-2 is a measuring device, which measures the snow water equivalent (SWE) of the snow pack with a high level of precision and reliability. The installation is quick and easy. The fact that there is no anti-freeze needed makes the system environmentally friendly.


The snow water equivalent serves as an important parameter in monitoring snow and rainfall and in assessing snow quantities as well as for flood protection or water management. Various environmental authorities, weather services, hydrologists and water management use the snow scales accordingly. In comparison with the commonly used snow pillow, the snow scales does not use antifreeze and therefore can be installed in natural reserves without any risk.


The working principle of the SSG-2 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. This makes a total measuring surface of 2.8 x 2.4 m. The perforation of the panels prevents water accumulation, minimizes the difference in temperature between the scales and the ground and promotes uniform melting. The measurement is carried out on the centre plate, the surrounding plates serve as a stabilizing zone in order to compensate stress in the snow pack as well as to counteract the problem of ice bridges through the large measuring surface. The SSG-2 system provides more accurate measuring data compared to the snow pillow during periods of snow melt. Furthermore, the modular design of the snow scale facilitates quick and easy assembly on level ground up to an inclination of five degrees.





General Specification


Weight (Mass)

110 kg (242.5 lb)


Size L x W x H: 2800 x 2400 x 103 mm (110.24 x 94.49 x 4.06 inch)

Power Supply

9…28 VDC; Reverse voltage protection, overvoltage protection

Power Consumption

Power Consumption at 12 VDC: max. 50 mA active <1mA in sleep mode


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 Environment

Operating Temperature: -40…+60 °C (-40…140 °F)
Storage temperature: -40…60 °C (-40…140 °F)
Environmental humidity: 0…100 %rH

Protection Level

IP 68

Lightning Protection

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

Housing Material


Surface area

6.72 m²

Max. inclination

Snow water equivalent (SWE)

Measurement range: 0 … 1.000 mm SWE, 0 … 2.000 mm SWE , 0 … 3.000 mm SWE
Accuracy: 0…500 mmWC: ±1 mmWC , 500 mmWC … Full scale: ±0.2 % of reading
Resolution: 0.1 mmWC (0.1 kg/m²)
Measurement interval: 10 s…3 h

Temperature Measurement

Temperature sensor : Pt1000
Measurement range: -40…60 °C (-40…140 °F)
Accuracy: 0.2 °C (0.35 °F)
Resolution: 0.01 °C (0.02 °F)