Laser Precipitation Monitor

The Thies Laser Distrometer is especially designed for the use in several applications, and the entire precipitation characterization. Thanks to the wide range of provided measurementparameters and its flexible configuration, the usage of a Distrometer is now advisable in numerous fields of applications. The laser based measuring approach guarantees a reliable and accurate measurement of all known kinds of precipitation. It is possible to measure the amount, the intensity also as the particle size, and the velocity of precipitation. A main advantage of this sensor is to measure particles down to 0,16 mm diameter. The reliable, maintenance-free laser-optic of the instrument detects and discriminates different kinds of precipitation, such as drizzle, rain, hail, snow, snow-grains, graupel (small hail/snow pellets),

and ice pellets. The system calculates intensity, volume (as water equivalent), and the spectrum of precipitation (diameter and velocity), as well as the meteorological visibility (MOR in rain), and the radar reflectivity (Z). State-of-the- art DSP technology and high quality optical components guarantee, precise measurements, and faithful results in real-time. All data are transmitted via a galvanicisolated RS485 interface for further processing. SYNOP codes acc. to table 4680/4677 and METAR acc. to table 4678 are fixed implemented.

Ultrasonic

Anemometer 2D a

The Ultrasonic-Anemometer detects the horizontal component of the wind speed and wind direction. The anemometer is free from wear and maintenance, and needs no further calibration. For winter operation the instrument is equipped with a heating. An alternative model with additional heating elements guarantees a reliable operation even under extreme or harsh climatic conditions. The electronics of the instrument is based on the latest DSP (digital signal processor) technology. The measuring principle allows an inertia-free measurement of the running variable dimensions with ultimate precision. The data output for wind direction and wind speed can be effected as instantaneous or gliding mean value (VDI 3786 sheet 2), alternatively as analogue or digital signal. The averaging procedure can be set alternatively in vectorial or scalar form. Another feature is to use the analogue channels as signal input, for example for external sensors for temperature and rel. humidity. The digital interface (RS422/485) with an integrated command interpreter allows the access to all data, and status information as well as the individual parameterisation of a user specific output data telegram.