Gill Instruments

WindUltra

ClimateMeteorological Station & Sensors

Compact, lightweight and robust; Gill’s smallest and lightest ultrasonic anemometer

Compact ultrasonic 2-axis anemometer
Low power wind sensor RS485 NMEA MODBUS
Best ultrasonic wind sensor for harsh environments

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Overview

The WindUltra is Gill’s ultra-compact, solid-state, 2-axis ultrasonic wind sensor designed for high-accuracy measurement of wind speed (up to 75 m/s or ~270 km/h) and full 360° wind direction, without any moving parts. It’s built to be tough: tested to high environmental protection standards (IP66, IP68, IP69k), with integral heating to handle temperatures down to about -40 °C. It’s lightweight (≈ 150 g sensor + pole-mount accessory) and offers fast, flexible mounting options (1″ or ~1.75–2″ pole mounts) for rapid alignment. Outputs include industry-standard digital protocols such as RS-485, MODBUS, NMEA, and SDI-12, making it suitable for marine, UAV / drone, smart city, renewable energy, and harsh environment monitoring applications.

Typical Applications

Automatic weather stations
Ventilation and building automation
Marine and coastal locations including ports and data buoys
Smart cities and loT systems

Key Features

Accurate wind speed and direction measurement, up to 75m/s
Robust and compact, corrosion free design with configurable heating
Data formats available include ASCII, Modbus, NMEA and SDI-12
Innovative mounting design to ensure simple, secure installation.
Support available including set-up software and easy-to-access technical support

Benefits

Able to provide high quality measurements in difficult environments
Ideal for restricted locations with low profile, compact design
Easy to set up, install, andalign with free-to-use tools and features
Suitable for use in environments where low level heating would be acceptable, with user defined heater activation temperature settings.

Specifications


WIND SPEED
Range	0 -75 m/s (168mph, 270km/h)
Accuracy	0 -20m/s < 2% RMSE or 0.1m/s RMSE (whichever is greater) >20m/s < 3%RMSE
Resolution	0.01 m/s
Threshold	0.01 m/s
Respond time	0.125 seconds

WIND DIRECTION
Range	0 - 360°
Accuracy	0 - 20 m/s < 1° RMSE >20 m/s < 2° RMSE
Resolution	1°

DATA OUTPUT CONFIGURATION
Output rate	Polled or 1, 2, 4 or 8Hz in continuous mode
Parameters	Polar wind and gust speed and direction, Signed U & V vectors, Supply voltage
Wind speed units	m/s, knots, mph, km/h, ft/min
Wind direction units	Degrees

POWER SUPPLY
Voltage	5-30 VDC, 12 VDC optimum
Power	< 100 mW to 800 mW @ 70 m/s unheated <7.6 W heated
Heating operation	M12 input: available 10 to 30 VDC
Over voltage protection	To 38 VDC & reverse polarity

MECHANICAL
Materials	Thermoplastic and marine-grade stainless steel
Size	84 mm diameter With 1" pole mount: 189mm height or With 2" pole mount: 107mm height
Weight	With 1" pole mount: 270g or With 2" pole mount: 260g

ENVIRONMENTAL
Operating temp.	-40°C to +70°C
Storage temp.	-40°C to +80°C
Operating humidity	< 5% to 100% RH
Rainfall	300 mm/hr

TEST & REGULATORY STANDARDS
Protection class	IP69k, IP68 & IP66 EN 60529: 1992
EMC	BS EN 61326: 2013 BS EN 60945: 2002 & FCC
Regional markings	CE, UKCA, FC Part 15
RoHS compliant	Yes

PROTOCOLS & INTERFACES
Polled ASCII	RS-485, configurable output string
Broadcast ASCII	RS-485, configurable output string
Modbus RTU	RS-485, 32-bit float, 32-bit and 16-bit integer registers
NMEA 0183	RS-422, configurable output string
SDI-12	SDI-12
Baud rate	1200 to 115200