034B-ET Wind Set for ET Station
Reliable, Accurate Wind Measurements
Configured for use wiith Campbell ET stations
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications

Overview

The 034B-ET, manufactured by Met One, combines a three-cup anemometer and vane into a single integrated package to measure wind speed and direction. This wind set is constructed out of lightweight aluminum and is designed for continuous, long-term operation for your applications.

For this version of the 034B Wind Set, the cable terminates in a connector and is the ideal length for attachment to the ET107 or ET106 ETo Weather Station. 


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Detailed Description

The 034B-ET monitors wind speed using a three-cup anemometer that contains a sealed magnetic reed switch. Rotation of the cup wheel produces a pulse that is directly proportional to wind speed. The frequency of the pulse is measured by the datalogger pulse count channel, then converted to engineering units (mph, m/s, knots).

Wind direction is sensed with a potentiometer. With the precision excitation voltage from the datalogger applied to the potentiometer element, the output signal is an analog voltage that is directly proportional to the azimuth of the wind direction.

Compatibility

The 034B-ET is a replacement part for the ET107 and ET106.

Specifications

Operating Temperature -30° to +70°C
Cable Length 170.18 cm (67 in.)
Weight 907 g (2 lb)

Wind Speed (Anemometer)
Range 0 to 75 m/s (0 to 167 mph)
Accuracy < 10.14 m/s (22.7 mph) 0.1 m/s (0.25 mph)
Accuracy > 10.14 m/s (22.7 mph) ±1.1% of true
Resolution (0.7998 m s-1) / (scan rate in seconds) or (1.789 mph) / (scan rate in seconds)
Starting Threshold 0.4 m/s (0.9 mph)
Sensor Output Pulsed contact closure
Anemometer Radius 10.7 cm (4.2 in.)
Anemometer Height 24.4 cm (9.6 in.)

Wind Direction (Vane)
Mechanical Range 360°
Electrical Range 356° (4° open)
Accuracy ±4°
Damping Ratio 0.25
Resolution < 5°
Potentiometer Resistance 0 to 10 kΩ (open at crossover)
Vane Length 33.5 cm (13.2 in.)

Frequently Asked Questions

Number of FAQs related to 034B-ET: 1

  1. If a sensor automatically ships with a calibration sheet, what information is included on it?

    The information included on a calibration sheet differs with each sensor. For some sensors, the sheet contains coefficients necessary to program a data logger. For other sensors, the calibration sheet is a pass/fail report.

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