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Scientific Sales, Inc.
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Model WE-1100 - Sonic Anemometer

Model WE-1100 -Sonic Anemometer

The Model WE-1100 Sonic Anemometer (P/N 102779) is 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.

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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 WE-1100 operates 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 measures only 4 inches in diameter and 8 inches high, and 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. With the flux-gate compass option, the wind direction output is automatically referenced to magnetic north.

The small size and surface area of this anemometer allows it to be kept ice free even at relatively low power levels. The heated version of this anemometer 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
Repeatability
±0.2 m/s (0.45 mph) or 5%

Wind Direction

Range 0 to 360°
Accuracy *
± 5° (Including compass error)
Resolution
±1.0°

ELECTRICAL

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)
ENVIRONMENTAL

Temperature -40
° to 60°C (-40° to 140°F)
Humidity 0 to 100%

PHYSICAL

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 ¾ in IPS (1.05” or 26mm
OD) vertical pipe stub.

SHIPPING

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
NMEA D2

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

Model WE-1100 -Sonic Anemometer

WE-1100 Sonic Anemometer

Specifications