Enviromental measuring systems

Wind speed and direction sensor VMT 107A

Wind transmitter VMT107A is a combined sensor for wind speed and wind direction.

Small dimensions
Low-threshold starting speed
Resistant to all weather conditions
Anodized aluminum and plastic
Different output signal
Type calibrated in wind tunnel
Minimal maintenance
Suitable for national met office

General
Technical data
Documents
Video
Images

Wind transmitter VMT107A is a small dimensions, digital optoelectronic sensor for wind speed and wind direction mesurements. It is made from naturally anodized aluminium. Quality sealed ball bearings are used for both speed and direction measuring systems.

For wind speed part of the sensor a lightweight three-cup assembly (Robinson's cup) is used which, with a stroboscope disc and optoelectronic elements, gives frequency output proportional to the wind speed.

For the wind direction a square rudder is mounted on the axis of coding disc. In combination with the optoelectronic elements, this gives coded data on 6-bit Grey's coding system.

All electronic elements are protected against overvoltages by resistors and Zener diodes. Normal additional mechanical load (freezing) cannot damage the sensor.

On the bottom of VMT107A there are support for mounting the sensor and 10-pole connector.

Optional output: voltage, current, RS232, RS485 or SDI.

Product references

	WIND SPEED	WIND DIRECTION
Measuring range	0 m/s – 50 m/s	0° to 360°
Starting speed	0.5 m/s	0.5 m/s
Distance constant	aprox. 3m fluid flow past the sensor required to cause it to respond to 63,2%
Accuracy	+/- 0,5 m/s	+/- 2,75°
Resolution	0,1 m/s	5,5°
Sensitivity	20 imp/m
Measuring system	stroboscopic disk, optoelectronic transducer	optoelectronic transducer
Output signal	pulse signal frequency 1 kHz at 50 m/s	6-bit grey code
Optional ouput signal	voltage output 0…10V, current output 4…20 mA, RS232, RS485 serial communication (9600/8,N,1) or SDI
Power supply	12 VDC
Power consumption	12 mA
Operating temperature	-40 to + 60 ° C
Storage temperature	-50 to + 80 ° C
Connector	Souriau, 10-pole, weatherproof
Cable	9 wire, shielded
Dimensions	ϕ 300 x H 240 mm
Mass	400 g
Mounting	mounting bracket, hole ϕ 6mm
Material	body - anodized aluminium Robinson's cup - UV stabilized plastic

Title	Description	Filename
VMT 107A diagram	VMT 107A diagram	VMT_107A_shema.PDF
Datasheet VMT107A		VMT107A_EN.pdf
Order form		VMT107A_Order_form.pdf

Title	Description	Url
Wind speed factory test

Wind direction factory test

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