*Large Aperture Scintillometer BLS450*
The Scintec BLS450 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.

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.

*FEATURES-1*
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

*FEATURES-2*
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*
Specifications

*SPECIFICATIONS-TABLE*
Data output (includes but is not limited to)
# (Description) # 
# 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 #   

*SPECIFICATIONS-TABLE*
General Specifications
# (Parameter) # (Specification) # (Remarks) #
# No. of transmitting disks # 1 # horizontally spaced #
# No. of LEDs # 444/18 # infrared/visible #
# Optical output power # 7.5 W peak # at 880 nm wavelength #
# Transmitter divergence # 16° # full width at half maximum #
# Receiver field of view # 8 mrad # receiver alignment automatically monitored #
# Corrections for absorption fluctuations and outer scale effect # no # 
# Crosswind measurement capability # no # 
# Path length # 100 / 500 to 6000 m # with / without Path Reduction Aperture #
# Pulse repetition rate # 1, 5, 25 Hz or continuous #
# Integration time # 1 sec to 60 min #
# Output ports # Ethernet, RS-232, analogue # ASCII #
# data Storage Capacity # 6 GB #
# Internal clock # date and time #
# Operating voltage # 10 to 15 VDC # AC power supply available #
# Power consumption: Transmitter "Long Path", "Boost" # 30 W / 7 W / 4 W / 2 W # continuous mode/25 Hz/5 Hz/1 Hz pulse repetition rate #
# Power consumption: Receiver SPU # 16 W #
# Operating temperature # -35°C to +50°C (-30°F to +120°F) #
# Dimensions and weight: Transmitter # 18 x 18 x 14 cm / 4.5 kg #
# Dimensions and weight: Receiver # 61 x 32 x 16 cm / 7.6 kg #
# Dimensions and weight: SPU # 33 x 23 x 18 cm / 8 kg #

The BLS450 uses one radiating disk, which makes it the most economical and lightest of the BLS series.
Selected Products
No products selected

(c) Scintec AG 2021