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Ultrasonic Anemometer 1D

Ultrasonic Anemometer 1D

For acquisition of the horizontal airflow and direction in tunnels,
tubes or similar applications.
Thanks to the high measuring rate, the instrument is also well-
suited for inertia-free measurement of gusts and peak values.
  • The measuring values are available as analogue signals and/or data telegram via a serial interface
  • Analogue output: Flow velocity with or without direction identification.
  • Digital output: Flow velocity with direction identification and virtual temperature.
  • The sensor arms are automatically heated in case of critical ambient temperatures, so that the function is guaranteed even with winterly 
    conditions.

Technical Data
Flow velocity
Measuring range 0...20 m/s
Accuracy ± 0,1 m/s, in the range of 0…5 m/s resp. ± of m.r., from > 5 m/s
Resolution 0,1 m/s
Direction identification
Messbereich: 1° / 181° (Info: 0° = calm)
Virtual Temperature
Measuring range - 40 .... + 70°C
Accuracy ± 0,5 K
Resolution 0,1 K
Data output, digital
Output Flow velocity, flow direction and virtual temperature as:
Instantan. value, gliding mean value 1sec; 10sec; 1min; 2min; 10min
Interface RS 485 / RS 422
Baud rate 1200, 2400, 4800, 9600, 19200 selectable
Output rate 1 per 100 msec to 1 per 25 sec selectable
Status recognition Heating, measurement section failure
Data output, analogue
Output Flow velocity with and without direction identification (no output of virtual temperature as analogue value) as: Instantan. value, gliding mean value 1sec; 10sec; 1min; 2min; 10min
Output signal 0 ... 20 mA (factory setting) or 4... 20 mA
Electr. output 1 Direction-independent, for ex. 0... 20 mA = 0... 20 m/s
direction-independent, for ex. 0...10...20 mA = -20...0...+20 m/s
Electr. Output 2 Load at current output max. 400 ohms
load at voltage output min. 4000 ohms
Output rate Update-rate 1 per 100 msec
Resolution 12 Bit
General
Internal measurement rate 400 measurements per second at 25°C
Temperature range Operating temp.: -40…+70 °C storage –50…+80 °C
Operating voltage P. supply electronics, 12…24 V AC/DC ± 10%; approx. 3 VA
p. supply heating, 24 V AC/DC ± 15%; max. 35 VA
Protection IP 66
Icing Acc. to THIES STD 012001
Corrosion 3 months salt spray- and condensation-test: no corrosion
EMC EN 55022 5/95 class B; EN 50082-2 2/96
Model V4A stainless steel for cover and transformer arms
Mounting Flange plate with boring
connection 3m cable via high-strength cable gland
Weight 2,5 kg

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