Vaisala WXT520 Technical data

Vaisala Weather Transmitter WXT520 Access to Real Time Weather Data

www.vaisala.com

The WXT520 has an automatic control circuit that switches the heating on at low temperatures.

Features/Beneﬁts

Measures 6 most

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essentialweather parameters

Accurate and stable

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Low power consumption

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– works also with solar panels

Compact, light-weight

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Easy to install with one-bolt

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mounting method

No moving parts

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Heating available

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Vaisala Conﬁguration Tool

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for pc

USB connection

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IP66 housing with mounting kit

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Applications: weather stations,

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dense networks, harbors, marinas

WXT520

The Vaisala Weather Transmitter WXT520 measures barometric pressure, humidity, precipitation, temperature, and wind speed and direction.

To measure wind speed and direction, the WXT520 has the Vaisala WINDCAP ultrasound to determine horizontal wind speed and direction. The array of three equally spaced transducers on a horizontal plane is a Vaisala specic design. Barometric pressure, temperature, and humidity measurements are combined in the PTU module using capacitive measurement for each parameter. It is easy to change the module without any contact with the sensors.

The WXT520 is immune to ooding clogging, wetting, and evaporation losses in the rain measurement.

sensor that uses

Measuring acoustic precipitation

The WXT520 precipitation measurement is based on the unique Vaisala RAINCAP detects the impact of individual rain drops. The signals exerting from the impacts are proportional to the volume of the drops. Hence, the signal from each drop can be converted directly to the accumulated rainfall.

The WXT520 measures accumulated rainfall, rain intensity and duration of the rain — all in real time.

The Vaisala RAINCAP only maintenance-free precipitation sensor on the market.

Sensor, which

Sensor is the

Technical data

°C

-0.7

0.7

0.6

0.5

0.4

0.3

0.2

0.1

-0.1

-0.2

-0.3

-0.4

-0.5

-0.6

0-60

-40

-20 20

-80

Wind

SPEED

range 0 ... 60 m/s response time 250 ms accuracy

0 ... 35 m/s ±0.3 m/s or ±3%,

whichever is greater

35 m/s ... 60 m/s ±5% output resolutions and 0.1 m/s, 0.1km/h, units 0.1 mph, 0.1 knots

DIRECTION

azimuth 0 ... 360° response time 250 ms accuracy ±3°

output resolution and unit 1°

Liquid precipitation

RAINFALL

output resolutions and

units 0.01 mm, 0.001 inches

accuracy 5%*

RAINFALL DURATION

output resolution and

unit 10 s

RAIN INTENSITY

range 0 ... 200 mm/h (broader range with

output resolutions and

units 0.1 mm/h, 0.01 inches/h

HAIL

output resolutions and

units 0.1 hits/cm2, 0.01 hits/in2, 1 hits

HAIL DURATION

output resolution and unit 10 s

HAIL INTENSITY

output resolutions and units * Due to the nature of the phenomenon, deviations caused by spatial variations may exist in precipitation readings, especially in a short time scale. The accuracy speciﬁcation does not include possible wind induced errors.

cumulative accumulation after the

latest automatic or manual reset

counting each ten-second increment

whenever water droplet is detected

one-minute running average

in ten-second steps

reduced accuracy)

cumulative amount of hits against

the collecting surface

counting each ten-second increment

whenever hailstone is detected

one-minute running average

in ten-second steps

0.1 hits/cm2h, 1 hits/in2h, 1 hits/h

Air temperature

Range -52 ... +60 °C (-60 ... +140 °F) Accuracy for sensor at +20 °C ±0.3 °C (±0.5 °F) Accuracy over temperature range (see graph below)

Output resolutions and units 0.1 °C, 0.1 °F

Barometric pressure

Range 600 ... 1100 hPa Accuracy ±0.5 hPa at 0 ... +30 °C (+32 ... +86 °F)

±1 hPa at -52 ... +60 °C (-60 ... +140 °F) Output resolutions and units

0.1 hPa, 10 Pa, 0.0001 bar,

0.1 mmHg, 0.01 inHg

Relative humidity

Range 0 ... 100 %RH Accuracy ±3 %RH within 0 ... 90 %RH

±5 %RH within 90 ... 100 %RH

Output resolution and unit 0.1 %RH

General

Operating temperature -52 ... +60 °C (-60 ... +140 °F) Storage temperature -60 ... +70 °C (-76 ... +158 °F) Operating voltage 5 ... 32 VDC Typical power consumption 3 mA at 12 VDC (with defaults) Heating voltage 5 ... 32 VDC / 5 ... 30 VAC

RMS

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

USB connection, Weigth 650 g (1.43 lb) Housing IP65 Housing with mounting kit IP66

Electromagnetic compatibility

Complies with EMC standard EN61326-1; Industrial Environment IEC standards

IEC 60945/61000-4-2 ... 61000-4-6

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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.