Wind Speed and Wind Direction / ICEFREE3A
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This product is no longer available. Some accessories, replacement parts, or services may still be available.
This product is no longer available. Some accessories, replacement parts, or services may still be available.
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Overview
The ICEFREE3A anemometer is an electrically heated wind-speed sensor, designed for ice-prone sites. The sensor provides an electrical output signal with frequency directly proportional to wind speed.
The ICEFREE3A is manufactured by Renewable NRG Systems and has an 8 m (26 ft) cable.
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Technical Description
The ICEFREE3A monitors wind speed using a three-cup anemometer. Rotation of the cup wheel produces a sine-wave that is directly proportional to wind speed. The frequency of the sine wave is measured by the data logger pulse count channel, then converted to engineering units (mph, m s-1, knots).
Wiring Information
Gray Cable
- Clear - Signal
- Black - Reference
- Shield - Shield
Red Cable
- Black - Heater
- White - Heater
Specifications
| Sensor | 3-cup anemometer |
| Measurement Description | Wind speed |
| Range | 0 to 90 m s-1 (0 to 200 mph) |
| Sensor to Sensor Variation | 99.7% of sensors fall within 4.3% of stated transfer function (based on over 800 samples) |
| Distance Constant | 7.6 m (25 ft) for 63% recovery |
| Sensor Output Signal Range | 0 to 155 Hz |
| Operating Temperature Range | -40° to +60°C |
| Operating Humidity Range | 0 to 100% RH |
| Supply Voltage | 24 V ac/dc |
| Supply Current Inrush | 8 A (maximum) |
| Supply Current Steady State | 1 A at 20°C, 4 A under maximum thermal load (head frozen in clear ice then powered on) |
| Body Diameter | 7.0 cm (2.75 in.) |
| Swept Diameter of Rotor | 12.7 cm (5 in.) |
| Cable Length | 8 m (26 ft) |
| Overall Assembly Height | 22.4 cm (8.82 in.) |
| Weight | 1.45 kg (3.2 lb) |
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.