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Vaisala Ceilometer CL31

Updated:2026-09-14

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Product Details

Vaisala Ceilometer CL31 Description:

CL31 Datasheets CL31 User guides

The CL31 was designed to deliver cloud baseheight and vertical visibility measurements in alltypes of weather — good or bad. It’s the perfectmonitoring tool for capturing accurate cloudand mixing layer height data meteorologists andaviation specialists need to generate detailedweather prediction models for operational andsafety planning. Advanced sensor and lidartechnology lets you capture three cloud layerssimultaneously, delivering detailed measurementsespecially for low clouds and low inversion layers,precipitation, and fog. Add the optional Vaisala SkyCondition algorithm, and you have an easy andcost-effective way to generate even more usefulinformation from your ceilometer.

Accurate, reliable cloud base heightand vertical visibility data to 25,000ft(7.6km)

Fast, accurate cloud and visibilitydetection is crucial to creating preciseforecasting, situational awareness,and air quality reporting. Even whenthe weather is at its worst, Vaisala’sCeliometer CL31 captures the detailedcloud layer data needed to buildprecision simulations of existingconditions. After all, the quality ofweather modeling is only as good as thedata you collect.

Key benefits:

  • Advanced single-lens optics and processing provides improved performance for cloud andmixing layer height measurements, especially for low clouds and low inversion layers,precipitation, and fog
  • Pulsed diode lidar for reliable operation andlong life expectancy
  • Full backscatter profiling with detailedaccuracy and reliability in all weather conditions up to 25,000ft (7.6km)
  • Fast measurement technology that delivers accurate detection of the fine cloud base structure such as the detection of thin stratus cloud patches below a solid cloud base
  • Complete, preconfigured delivery, includingmain assembly, sensors, and powerequipment for easy installation. Fits on thefoundation of earlier Vaisala ceilometers forquick upgrades

Applications:

Reliable cloud detection and reporting forcritical operational safety in meteorological andaviation settings

Inputting cloud height and sky condition sourcedata for numerical weather prediction models

Verification of numerical weather forecastingand dispersion models

Generating vertical profiling data toprovide comprehensive understanding ofthe atmosphere

Automatic monitoring of boundarylayer structures

Supporting air quality data processing systemsto study the interaction between pollutants andmeteorological factors

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