WE-1100 Sonic Anemometer

: $1,695.00
: $1,295.00
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Availability:: Usually Ships in 2-3 Weeks
Product Code: WE-1100

WE-1100 Sonic Anemometer
• No Moving Parts
• No Periodic Maintenance
• Digital and Analog Outputs
• Automatic North Alignment (Optional)
• Ice-Free Operation (Optional)
• Two Year Warranty
• Field configurable

The Model WE-1100 Sonic Anemometers (P/N 102779) are designed for ambient wind sensing in harsh environment industrial applications as a direct replacement for conventional mechanical propeller and cup anemometers, both in terms of performance and cost. It requires no periodic maintenance or calibration.

The WE-1100 anemometer instruments operate on the principle of the measurement of the speed of sound in air. All electronics utilize the latest solid state surface mount technology, conserving power, size, and weight, with a power consumption of less than 0.5W for the unheated version. The WE-1100 Sonic Anemometers measure only 4 inches in diameter and 8 inches high. The body is slender and aerodynamic to assure that minimum turbulence is introduced into the measured air stream. Measurement interference is further reduced by the transducers being located out of the measurement air stream. This also serves to increase the reliability and longevity of the sensor as dust, debris, snow, rain, etc, will not impact directly on the transducers.

Standard digital outputs are RS-232C, RS-485 and SDI-12 which are easily interfaced to any commonly available data acquisition systems. A variety of standard analog outputs are also available for this anemometer instrument. With the flux-gate compass option, the wind direction output is automatically referenced to magnetic north.

The small size and surface area of these sonic anemometers allows them to be kept ice-free, even at relatively low power levels. The heated version of this anemometer instrument P/N 102729, includes the heating elements, which are factory-installed. The heater control box, P/N 102626, is ordered separately. The WE-1100 is now totally field configurable through a very user friendly, software interface, which is accessed through the serial port.

This sensor is ideal for applications requiring high reliability, NO maintenance, ruggedness, ice-free operation or portability.


PERFORMANCE P/N 102779 or 102729

Wind Speed

Range 0 to 65 m/s (0 to 145 mph)

Accuracy *

±0.5 m/s (1.1 mph) or 5%

Resolution 0.1


±0.2 m/s (0.45 mph) or 5%

Wind Direction

Range 0 to 360


Accuracy *

± 5° (Including compass error)




Measurement Format Two orthogonal axes,

North/South and East/West

Measurement Rate 2 Hz each axis

Operating Frequency 40 KHz

Signal Output DIGITAL: RS-232C, 100 ft @

9600 BPS & 50 ft @ 19.2

KBPS RS-485, 4000 ft @ 9600

BPS and SDI-12, 200 ft @

1200 BPS ANALOG: 0 -1, 0-

2.5, 0-5 or 1-5 VDC, over the

measurement range selected.

Power Requirements Sensor: 9 - 36 VDC @ 35mA

nominal, option dependent

Heater**115 VAC/60 Hz, 100W

Mean Time Between

80,000 hours

Failures (MTBF)


Temperature -40

° to 60°C (-40° to 140°F)

Humidity 0 to 100%


Weight 1.00 kg (2.2 lbs)

Size 203.2 mm (8.0 in) high by

101.6 mm (4.0 in) dia

Mounting P/N 102779 = 102778 mount

P/N 102729 = 102286 mount

to Ύ in IPS (1.05” or 26mm

OD) vertical pipe stub.


Weight 1.36 kg (3.0 lbs)

Volume 0.012 m

3 (0.44 ft3)

* This accuracy is maintained when the sensor is within

± 10 degrees of vertical

Options Configuration Guide

Contact the factory for options configuration for P/N 102729 heated version

Base Part Number 102779

Std. Digital Outputs RS-232C, RS-422/485 and SDI-12

Analog Output

Options None A0

0 - 1 Volt A1

0 - 5 Volt A2

0 - 2.5 Volt A3

1 - 5 Volt A4

Compass Option None C0

11709 C1

Digital Output

Options Standard D0

485 Tracker D1


Typical Complete Part Number: 102779-A0-C0-D0

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