Vaisala WMT52 Technical data

WMT52 Ultrasonic Wind Sensor for Accurate and Stable Measurement

Applications

The WMT52 is ideal for use in marine applications as the housing with the mounting kit is water resistant. The WMT52 is also suitable for wind energy and environmental monitoring, for example, for measuring the distribution of air pollution and road tunnel ventilation.

Easy to install

The WMT52 is delivered fully assembled and congured from the factory. With the Vaisala Conguration Software Tool you can change the settings, such as averaging times, output mode, update intervals, measured variables and message contents.

The Vaisala WINDCAP® Ultrasonic Wind Sensor WMT52 - stable and inexpensive wind measurement for demanding applications.

Features/Beneﬁts

Measures horizontal wind

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speed and wind direction

Triangular design ensures

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excellent data availability

No moving parts

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Maintenance-free

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Optional heating available

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Compact, durable and robust

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Low power consumption

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IP66 housing with mounting kit

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Applications: marine, wind

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energy, environmental monitoring

Proven Vaisala performance

The Vaisala WINDCAP® Ultrasonic Wind Sensor WMT52 incorporates decades of Vaisala experience in wind measurement using ultrasound to determine horizontal wind speed and direction.

With no moving parts, the WMT52 has high sensitivity as the measurement time constant and starting threshold are virtually zero. This makes it superior to the conventional mechanical wind sensors.

The WMT52 is designed to operate without periodic eld calibration and maintenance.

The WMT52 can be mounted either on top of a pole mast or on a cross arm.

When using the optional mounting kit, the north alignment needs to be performed only once.

Heating

The optional heating available in the WMT52 assists measurements in the freezing weather conditions and during snowfall.

As the heating circuit is independent of the operational power, separate supplies can be used. Heating is switched on automatically at low temperatures, well before the freezing point.

Low power consumption

The WMT52 has very low power consumption; during the idle mode the device typically consumes about 2 ... 3 mW.

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Technical data

Ø 114 (4.49)

Ø 115 (4.53)

139 (5.48)

99 (3.9)

32 (1.3)

Wind

WIND SPEED

Range 0 ... 60 m/s Response time 250 ms Available variables average, maximum, and minimum Accuracy

0 ... 35 m/s ±0.3 m/s or ±3 % whichever is greater 35 m/s ... 60 m/s ±5 %

Output resolution 0.1 m/s (km/h, mph, knots)

WIND DIRECTION

Azimuth 0 ... 360° Response time 250 ms Available variables average, maximum, and minimum Accuracy ±3° Output resolution 1°

MEASUREMENT FRAME

Averaging time 1 ... 3600 s (=60 min), at one second steps

on the basis of samples taken

at 4 Hz rate (conﬁgurable)

Update interval 1 ... 3600 s (=60 min), at one-second steps

General

Self-diagnostics separate supervision message,

unit/status ﬁelds to validate

measurement quality

Start-up automatic, <10 s from power on to

the ﬁrst valid output

Serial data interface SDI-12, RS-232, RS-485, RS-422,

USB connection

Communication protocols SDI-12 v1.3, ASCII automatic &

polled, NMEA 0183 v. 3.0

with query option Baud rate 1200 ... 115 200 Operating temperature -52 ... +60 °C (-60 ... +140 °F) Storage temperature -60 ... +70 °C (-76 ... +158 °F) Dimensions

height 139 mm (5.7") diameter 114 mm (4.49")

weight 510 g (1.12 lb) Housing IP65 Housing with mounting kit IP66 Vibration IEC 60945 paragraph 8

Power supply

Operating voltage 5 ... 32 VDC Power consumption on average

minimum 0.1 mA at 12 VDC maximum 14 mA at 5 VDC typical 3 mA at 12 VDC

(default measuring intervals)

Heating voltage 5 ... 32 VDC / 5 ... 30 VAC

RMS

Accessories

Mounting kit 212792 Bird spike kit 212793 Surge protector for sensor WSP150

Electromagnetic compatibility

Complies with EMC standard: EN61326-1, Industrial Environment IEC standards IEC 60945/61000-4-2 ... 61000-4-6

Dimensions

Dimensions in mm (inches)

mounting kit

WINDCAP® is a registered trademark of Vaisala.

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For more information, visit www.vaisala.com or contact us at sales@vaisala.com

This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners. All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. The reproduction, transfer, distribution or storage of information contained in this brochure in any form without the prior written consent of Vaisala is strictly prohibited. All speciﬁcations — technical included — are subject to change without notice.