Get to know the first-of-its-kind sensor combining standard ceilometer measurements with advanced depolarization and particle differentiation.
The Vaisala CL61 ceilometer is a first-of-its kind technology that combines standard ceilometer measurements, like cloud base and ceiling heights, with new depolarization capabilities. Depolarization allows for precise particle and precipitation type differentiation, enabling dramatically improved situational awareness and forecasting.
CL61 is also easy to integrate, cost-effective, and backed by Vaisala’s globally trusted sensor technology and service capabilities. All this makes CL61 unique among ceilometers — an outstanding, cost-effective tool for improving decision-making and safety across several key applications.
See more than ever before — when it matters most. CL61 uses attenuated backscatter profiles measured in 2 polarization directions to calculate the depolarization ratio. The depolarization measurement not only enables the liquid/solid differentiation, but also makes it possible to detect dust, sand and volcanic ash. Improved optical system allows high signal to noise ratio and enables reporting of detailed vertical profiles for the full range, up to 15.4 km (9.6 mi).
With Vaisala, our technology is proven and backed by decades of experience in ceilometer development. With the CL61 single-lens technology, traceable calibration, depolarization, and ultrapure profiles, you receive accurate, research-grade data and professional support to improve your forecasting.
Even with its new depolarization measurement, the CL61 lidar ceilometer comes in at a fraction of a cost compared to other research lidars. Its low price point allows for the option to deploy multiple instruments in order to improve measurement coverage.
The CL61 sensor is simple to set up, and operates autonomously any time, without the need for calibration. Rely on uninterrupted depolarization profiling and data around the clock, and in all weather conditions.
CL61’s unique depolarization capability provides outstanding benefits unavailable with any other ceilometer:
To do this, CL61 uses attenuated backscatter profiles measured in two polarization directions to calculate the depolarization ratio. Its optical system allows for a high signal-to-noise ratio and enables reporting of detailed vertical profiles for the full range, up to 15.4 km (9.6 mi).
Today, CL61 is widely trusted and used for some of the most innovative aviation applications, including real-time monitoring of ongoing volcanic activity and comprehensive windshear solutions.
CL61’s unrivaled atmospheric data makes any airport more informed, safer, and more efficient.
CL61 provides value no other ceilometer can — improving forecasting and the effectiveness of meteorological agencies.
Unrivaled visibility into atmospheric boundary layer (ABL) and pollutants improves urban and industrial projects anywhere.
Learn more about the high-performance light detection and ranging (LiDAR) instrument with depolarization measurement capable of unattended operation 24/7 in all conditions.
Ceilometers are robust and cost-effective lidar-based remote sensing instruments. In addition to their traditional use in detecting cloud base heights in aviation, ceilometers are increasingly used for vertical atmospheric profiling for several applications.
Vaisala introduces the depolarization measurement capability to a high-end profiling ceilometer, setting a new standard in analysis and applications.
Accurate calibration is fundamental to the high measurement accuracy of Vaisala Lidar Ceilometer CL61. CL61 distance measurement is calibrated against a reference that is traceable to international standards (SI units).
Find additional resources, documents, and information about CL61 here.