Gill Instruments

WindObserver II

ClimateMeteorological Station & Sensors

Gill WindObserver II – Tough Design, Accurate Wind Data, Zero Maintenance

Heated ultrasonic anemometer option
High-precision ultrasonic wind sensor
Solid-state wind speed and direction sensor

Quantity

Overview

The Gill WindObserver II is a durable ultrasonic anemometer built for precise and maintenance-free wind measurement in demanding environments. Using advanced ultrasonic technology, it measures both wind speed and direction without any moving parts, ensuring consistent accuracy and long service life. The sensor is housed in robust stainless steel for maximum resistance to corrosion and is rated IP66, offering protection against dust and heavy rain. Designed for industrial, marine, and meteorological use, the WindObserver II provides digital output options such as RS422 and RS485, allowing easy integration into data systems. With its strong construction, reliable performance, and ability to operate in extreme weather, the WindObserver II is a trusted solution for professional wind monitoring applications.

Key Features

Precision Ultrasonic Anemometer
0-65m/s Wind Speed
0-360º Wind Direction
Free data logging software
Optional De-Icing System
Stainless Steel construction
Lloyds Register Type Approved
Averaging/gusts to WMO guidelines

Typical Applications

Aircraft Landing Systems
Marine Vessel Dynamic Positioning Systems
Ports and Harbours
Road and Rail Monitoring and Safety Systems
Wind Turbine Control Systems
Building Control and Structural Safety
High Altitude Weather Monitoring
Power Generation and Transmission Safety

Specifications


WIND SPEED
Range	0 - 65 m/s (0-145mph)
Accuracy	±2% @12 m/s
Resolution	0.01 m/s
Starting Threshold	0.01 m/s
Offset	0.01 m/s

WIND DIRECTION
Range	0 - 360°
Dead band direction	None
Accuracy	±2° @12 m/s
Resolution	1°

MEASUREMENT
Ultrasonic output rate	1Hz, 2Hz, 4Hz, 5Hz, 8Hz or 10Hz
Parameters	UV, Polar, NMEA, Tunnel
Units	m/s, knots, mph, km/h, ft/min
Average (Selectable)	Rolling average - 1, 2, 10 m.n, Gust - 3s
Block average	0-3600s

DIGITAL OUTPUT
Communication	RS422/RS485 full duplex/half duplex
Baud rates	1200, 2400, 4800, 9600, 19200, 38400
Formats	8-bit data; odd, even or no parity
Anemometer status	Supplied as part of standard message

ANALOGUE OUTPUT
Quantity	3 (Speed, direction, status or sonic temp)
Scale	Multiples of ±10 m/s up to ±70 m/s
Type	±2.5 V, 0-5 V or 4-20mA
V output resistance	60 Ohms
4-20mA loading	10-300 Ohms

MECHANICAL
External Construction	Stainless steel 316
Size	381mm x 213mm
Weight	1.4kg

ENVIRONMENTAL
Protection Class	IP66 (NEMA4X)
Humidity	< 5% to 100% RH
Operating Temperature	-55°C to +70°C (Heated option)
Precipitation	300mm/hr
EMC	EN 60945: 2002, EN 61326-1: 2013
Icing	MILSTD810F Method 521.2 Procedure I

POWER REQUIREMENT
Anemometer only	9-30 VDC (40mA @12 VDC)
Heating (optional)	3A @24 VAC or DC

APPROVALS
Standards	Traceable to national standards Lloyds Register type approval
Site Calibration	None required. Integrity check unit (Zero wind) supplied as optional extra