Overview
The Model 81005 Ultrasonic Anemometer is a 3-axis, no-moving-parts wind sensor. It is ideal for applications requiring fast response, high resolution and three-dimensional wind measurement. The sensor features durable corrosion-resistant construction with 3 opposing pairs of ultrasonic transducers supported by stainless steel members. Each 81005 is individually wind-tunnel calibrated. Wind and sonic temperature data is available on four voltage output channels. Serial RS-232 and RS-485 outputs are available as well. The sensor installs on standard 1 inch pipe.
Read MoreBenefits and Features
- Voltage output signals or serial output are available using RS-232 or RS-485 connections.
- Operating parameters may be edited using ordinary terminal software on a PC.
- All parameters are stored in non-volatile memory.
- Superior resistance to adverse environmental conditions
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Technical Description
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The 81005 measures wind velocity based on the transit time of ultrasonic signals sent between the transducers. Depending on its orientation and magnitude, air flow alters the sonic signal transit time. By measuring the transit time in each direction along all three paths, the three dimensional wind velocity and speed of sound may be calculated. From speed of sound, sonic temperature is derived. Speed of sound and sonic temperature are corrected for crosswind effects. Measurement data are available as voltage output signals, serial output using RS-232 or RS-485 connections. Both voltage and serial output may be configured for a variety of output formats. Operating parameters may be edited using ordinary terminal software on a PC. Simple menus make it easy. All parameters are stored in nonvolatile memory. Superior environmental resistance is achieved by using UV stabilized thermoplastic, stainless steel, and anodized aluminum components. Electrical connections are made via an easily accessible junction box. The unit mounts on standard 2.54 cm (1 inch) pipe.
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Specifications
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Wind Speed
- Range: 0 to 40 m/s (0 to 90 mph)
- Resolution: 0.01 m/s
- Threshold: 0.01 m/s
- Accuracy: ±1% rms ±0.05 m/s (0 to 30 m/s) ±3% rms (30 to 40 m/s)
Wind Direction
- Azimuth Range: 0.0 to 359.9 degrees
- Elevation Range: ±60.0 degrees
- Resolution: 0.1 degree
- Accuracy: ±2° (1 to 30 m/s) ±5° (30 to 40 m/s)
Speed of Sound
- Range: 300 to 360 m/s
- Resolution: 0.01 m/s
- Accuracy: ±0.1% rms ±0.05 m/s (0 to 30 m/s wind)
Sonic Temperature
- Range: -50 to +50 ºC
- Resolution: 0.01 ºC
- Accuracy: ± 2 ºC (0 to 30 m/s wind)
Voltage Output
- 4 channel Range: 0 to 5000 mV
- Resolution: 12 Bit
- Accuracy: ± 0.1% of full scale
General
- Air sample column: 10 cm high X 10 cm diameter
- Air sample path: 15 cm
- Output rate: 4 to 32 Hz (selectable)
- Output formats: Serial data (selectable) RS-232 and RS-485
- Baud Rates: 1200 to 38400
- Power Supply: 12 to 24 VDC, 110 mA
- Dimensions: Overall height 56 cm Support arm radius 17 cm
- Mounting: 34 mm (1.34 in) diameter (standard 1 inch pipe)
- Weight: Sensor weight 1. 7 kg (3.8 lb)
Compatibility
Mounting
The Ultrasonic Wind Monitor can be attached to a CM202, CM204, or CM206 crossarm via a CM220 Right Angle Mounting Bracket. Alternatively, the Wind Monitors can be attached to the top of our stainless-steel tripods via the CM216 Sensor Mounting Kit.
Datalogger Considerations
The 81005 data are available as voltage output signals or serial output using RS-232 or RS-485 connections. Both voltage and serial output may be configured for a variety of output formats.
Compatible Contemporary Dataloggers
| CR200(X) Series | CR800/CR850 | CR1000 | CR3000 | CR5000 | CR7X | CR9000X |
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Compatible Retired Dataloggers
| CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 |
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* Datalogger may require the use of a VDIV2.1