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Press Release | Environment

Press Release: New snow water equivalency (SWE) sensor improves on traditional snow pillows

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Edmonton, AB (November 16, 2010) – Campbell Scientific Canada, measurement and data acquisition leader for more than 30 years, is pleased to present the new GMON3 Snow Water Equivalency Sensor. The innovative design of the GMON3 makes it an excellent sensor for non-contact SWE measurement applications.  Values can be transmitted in real-time with the addition of a wireless communication option.

The GMON3 obtains a measurement by monitoring gamma rays that are naturally emitted from the ground. As snow accumulates on top of the ground, the GMON3 measures an attenuation of the normal background radiation levels. The higher the water content, the higher the attenuation of the gamma radiation.

The new sensor measures with an accuracy of ±15 mm from 0-300 mm and ±15% from 300-600 mm, operating within temperatures from -40°C to +40°C. The GMON3 can output an RS-232 (1200 to 115200 BAUD) signal interface to Campbell Scientific dataloggers or other recording devices. It is effective with any type of snow or ice.

For more information about the GMON3 visit

Campbell Scientific (Canada) Corp. (CSC) is an ISO 9001 certified, 100 percent Canadian owned provider of quality sensors, measurement instruments and data acquisition systems. CSC is a leader in system design, service, support, integration, calibration, and training.


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