Scintec - Model BLS450 Neo - Large Aperture Scintillometer
From Surface Turbulence Sensors - Large Aperture Scintillometers
The Scintec BLS450 Neo measures atmospheric turbulence and heat flux over path lengths between 100 m (with Path Reduction Aperture, otherwise 500 m) and 6000 m. As part of a meteorological station it can also be used to determine the evapotranspiration over extended areas.
Products Details
A scintillometer senses turbulence between an optical transmitter and a receiver. The operation principle is based on the modulation of light by atmospheric refractive index fluctuations in the air. The phenomenon is called scintillation and is the reason why stars twinkle at night.
Compared to conventional turbulence measurements with point sensors, scintillometers gather spatially representative results with lower statistical scatter and shorter averaging times. As a double-ended remote sensing system, scintillometers also allow access to terrains like forest or water without need to install in-situ sensors.
Unlike other large aperture scintillometers, the Scintec BLS Series uses LED arrays which produce wide emission angles. The wide emission angle virtually eliminates the need for transmitter alignment and provides more accurate measurement results. In addition, it facilitates the use on towers which are often prone to vibration.
The Neo Version (New Emission Option) operates at a wavelength of 850 nm and features a significantly reduced power consumption and increased LED lifetime.
Features
- maximum path length 6000 m
- LED array eases transmitter alignment
- built-in Receiver Alignment Monitor
- LED array allows transmitter to be mounted on vibrating towers
- measures turbulence over large spatial scales
- Signal Processing Unit performs all calculations
- 6 GB built-in data storage
- remote access
- infrared window heating available
Specifications
- Structure parameter of refractive index fluctuations (Cn2)
- Structure parameter of temperature fluctuations (CT2)
- Sensible heat flux
- Mean, standard deviation, minimum and maximum of intensity
- Scintillation index (at user-defined wavelength and path length)
- Fried diameter (at user-defined wavelength and path length)
- Raw intensity data
- Data quality code
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