Rugged, Reliable
Passive no-contact detector, ideal replacement for snow pillow
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The CS725 measures snow-water equivalent (SWE) by passively detecting the change in naturally occurring electromagnetic energy from the ground after it passes through snow cover. It is mounted above the ground and has no contact with the snow. As the snow pack increases, the sensor detects the attenuation of the electromagnetic energy from the ground, and SWE can be calculated. The measurement area of the CS725 is 50 to 100 square meters (540 to 1,075 square feet), making it an excellent replacement sensor for the traditional snow pillow and snow scale.

Benefits and Features

  • Performance not affected by rainfall or snowfall
  • Effective with any type of snow or ice
  • Excellent replacement for traditional snow-pillow sensors
  • Non-contact measurement
  • Does not cause the melt of light snow
  • Greatly reduces the need for site visits
  • No site preparation or earthworks required for setup
  • 5-10 times the measurement area of the nearest competitor
  • Not affected by snow bridging
  • Will not cause snow drifting
  • Seven-year maintenance cycle
  • No antifreeze chemicals used (i.e., glycol)


Similar Products

Detailed Description

The CS725 is powered using 12 Vdc and can either operate in a stand-alone mode, or be easily interfaced to a datalogger. With the addition of a wireless communication option, SWE values can be transmitted in real-time from remote sites.


  • Measurement Range: 600 mm maximum water equivalent
  • Accuracy:
    ±15 mm from 0 to 300 mm
    ±15% from 300 to 600 mm
  • Resolution: 1 mm
  • Coverage Beam Angle: 60°
  • Operating Temperature: -40° to +40°C
  • Power Requirements:
    11 to 15 Vdc
  • Power Consumption: 180 mA
  • Output Format: RS-232 (1200 to 115200 bps)
  • Maximum Cable Length: 30 m
  • Cable Type: four conductor, two-twisted pair, 22 AWG, Santoprene jacket
  • Length: 62 cm (24.4 in.)
  • Diameter: 12.7 cm (5 in.)
  • Main Body Weight: 9 kg (20 lb)
  • Collimator Weight: 25 kg (55 lb)
  • Total Weight: 34 kg (75 lb)


Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X

Compatible Retired Dataloggers

None of our retired dataloggers are compatible.