Scintec - Model SLS20 ES -Surface Layer Scintillometer

Each SLS Series Scintillometer consists of a laser transmitter pointing at a receiver. Temperature fluctuations in the air cause variations of the light intensity captured at the receiver. The scintillometer evaluates such variations to yield turbulence information.

The line averaging over the optical path results in spatially representative data and outstanding temporal resolution – a critical edge over data collected from conventional point sensors. The scintillometer provides high sensitivity and accuracy – without mechanical flow distortion or any moving part.

The proprietary displaced-beam technique of the SLS Series Scintillometers opens up access to mechanical turbulence quantities (momentum flux, kinetic-energy dissipation rate) without need to feed in any external wind data.

The Scintec SLS20 ES is fully eye-safe (laser safety Class 1).

• heat flux, momentum flux by purely optical means
• suitable for stable and unstable conditions
• high temporal resolution
• crosswind option available
• easy installation and operation
• beam-displacement calibration
• spatially averaging technique
• no flow distortion
• window heating

• Structure parameter of refractive index fluctuations (C_n²)
• Inner scale of refractive index fluctuations (l₀)
• Structure parameter of temperature fluctuations (C_T²)
• Dissipation rate of turbulent kinetic energy
• Sensible heat flux
• Momentum flux
• Obukhov length
• Path-average wind speed perpendicular to he beam axis (with crosswind extension)
• Mean, standard deviation, minimum and maximum of intensity
• Correlation coefficient of intensity
• Data quality code