WL-21Wind Speed andDirection Sensor

WIND SPEED & DIRECTION DATA LOGGER

COMBINED
WIND SPEED &
DIRECTION DISPLAY

Wind Speed
Live, Max, Average
0.3 - 50m/s
Wind Direction
360° No Blank Sector
8-Wind Compass Rose
Ambient Temperature
-30 - 60°C
-22 - 140°F
Barometric Pressure
500 - 1100 hPa
Beaufort Scale
All 12 Levels
Wind force Graph
Wind Chill
Selectable Units
With Timestamp
wireless anemoemter

PRECISE WIND SPEED &
DIRECTION SENSOR

Exceptional data accuracy. Ultra-long wireless range.
Trusted by The World’s Top Institutions

WIRELESS
WIND DATA
LOGGER

Record wind speed, direction, temperature, barometric pressure
Up to 1 year of long-term data recording (10s interval)
Data can easily export to Excel for wind site analysis
Selectable Intervals: 2s, 5s, 10s, 1min, 5 mins, 10 mins, 60 mins
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WL-21 wireless anemoeter

INDUSTRIAL GRADE WEATHER STATION

Scarlet WL-21 system measures and displays current/average/maximum wind speed, wind direction, temperature, wind chill, Beaufort scale, atmospheric pressure, and historic data graphic in high accuracy with multiple measurement units. Users are able to set wind speed threshold and receive instant alarm notification when wind speed exceeds the set threshold.

ABOUT WIND SPEED &DIRECTION SENSOR

WL-21 measures both wind speed and direction. The sensor has a wind cup on top to measure wind speed and a metal wind direction sensor on the bottom. The sensor is water-proof and dust-tight. It sends real-time measured data to the receiver. All Scarlet’ wind sensor has undergone a strict quality control to ensure accurate measurement.
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WL-21 wireless anemoeter

ROBUST WIND SENSOR COMPONENTS

Marine Grade Protection

IP67 certified watertight construction provides full protection against water and dust.

Robust Ball Bearings

Anti-corrosion stainless steel. Reliable for years of operation.

Replaceable Wind Cups

Lightweight material ensures fast response. Captures winds from all directions.

Enhanced Battery Life

Max 3 years of continuous operation

RELIABLE
WIRELESS ANEMOMETER

All Scarlet wireless wind anemometers are wind tunnel calibrated and CE & FCC certified.
Back 1-year global warranty.

Specifications-Wind Speed And Direction Sensor

The wireless module used on wind speed sensors only requires very low power consumption. The transmission power consumes 20-30 uA in normal condition and 35 mA peak current in every 2 seconds. The standard 3.6V Lithium battery can sustain the sensor for up to 3 years.

The transmission distance can reach as far as 500 meter in open space. The actual distance depends on the topology & obstacles. According to user experiences, the vertical transmission distance can be 200 meters in height. Harmonic disturbances are possible in theory, but so far we did not receive complaints about this.

Pairing between sensor & receiver is based on address.

The address is labeled on the sensor body. User can set receiver address by setting menus. All WL-21 were paired and tested before shipping. If the text instruction is still not clear, please visit this video.

Yes. Users can connect unlimited receivers to one wireless sensor.

Manufacturer and third party (issued by SGS) Lab certificates can be ordered on demand.

  • 500m Wireless Transmission Range
  • Instant Visual & Audible Wind Alarm
  • Data Recording Up to 1 Year 
  • Wind Data with Historical Graphs
  • Accurate Wind Speed, Temperature, Air Pressure Measurements
  • 3-years Sensor Battery Life
  • Low Power Consumption
  • Replaceable Wind Cups 
ItemDescription
Wind Speed Measurement Range0.3...50 m/s
Wind Speed Accuracy+/- 2 % FS
Wind Speed Resolution0.1 m/s
0.1 knots
0.1 MPH
0.1 km/hr
Units of Measurementm/s, knots, MPH,l km/hr
Temperature Measurement Range-30....+60 °C
Dimensions - Sensor262.5 x 183.5 x32mm
Dimensions - Display unit189.6 x 75.6 x 36.3mm
Receiver logging Interval2s, 5s, 10s, 1min, 5 mins, 10 mins, 60 mins
Display updatingevery 2 seconds
Data transmissionevery 2 seconds
Measurement interval2 seconds
Transmission frequency868MHz(default), 915MHz
Battery - sensor3.6V 18505 Lithium battery x1
Battery - display unit1.5V AA battery x3, Micro USB port
MountingMagnetic sensor mounting bracket
or 1/4" threaded hole

WL-21 Data Export Software
Download

Data Logging Anemometer-Find the Perfect Fit

WL-21
WR-3 Plus
WL-410/SD
WindPro
wireless anemometerwireless anemometer
Wireless RangeMax 500mMax 500m WL410: Max 500m
WL410XB: Max 1,300m
Max 1,300m
Web Portal: Unlimited
AlarmBuzzer, BacklightBuzzer, BacklightBuzzer + External warning deviceBuzzer + External warning device
Datalogging64MB Built-in Memory64MB Built-in Memory Optional:
4-20mA outputs
Phone App
Cloud-based storage
Wind DirectSensorYesNoOptionalOptional
Get a Quote >WR-3 Plus >WL410/SD >WindPro >

Our Customers

What Our Clients Say

The Scarlet wireless anemometer WL-21 is the best wind speed meter I ever used in my career life. It makes my job much easier and I can monitor wind speed in my office under bad weather conditions.

Michael Howes, Marine Superintendent & Advisor, BP Oil

I have been using WL-21 on all the lifts in my company for the last 6 months and couldn’t be happier with their performances and high quality.

Continental Multimodal Terminals

We are quite happy with the Scarlet WL-21 wireless wind speed meter. It works perfectly in our workshops. I highly recommend this wireless anemometer.

Arizona State University
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WL-21
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