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NRG Icefree3 heated anemometer
The IceFree3 signal output is a variable amplitude sine wave, where frequency is proportional to wind speed. Patented off-axis correction minimizes errors in measuring up-slope or down-slope winds. The internal heater is powered by 24 VAC and allows for an operating temperature range of -40°C to 80°C (-40 °F to 176 °F). The optional 120/240 VAC to 24 VAC Transformer – IceFree3 Sensors is available to step down 120/240 VAC grid power.
The IceFree3 Heated Anemometer comes with a 10 m potted cable that can be extended to your desired length using the Power Cable Kit – IceFree3 Sensor 2C, sold separately and available in 10 meter increments up to 90 meters.
10m (33') cable (#3447) |
10m (33') cable, Calibrated (#2578) | |
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DESCRIPTION |
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| Sensor type | 3 cup heated anemometer | 3 cup heated anemometer |
| Applications |
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| Sensor range | Maximum rated wind speed is 90 m/s (200 miles per hour) | Maximum rated wind speed is 90 m/s (200 miles per hour) |
| Instrument compatibility | All NRG loggers | All NRG loggers |
OUTPUT SIGNAL |
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| Signal type | Variable amplitude sine wave, frequency proportional to wind speed | Variable amplitude sine wave, frequency proportional to wind speed |
| Anemometer Transfer Function |
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| Sensor to Sensor Variation | 99.7% of sensors fall within 4.3% of stated transfer function (based on over 800 samples) | 99.7% of sensors fall within 4.3% of stated transfer function (based on over 800 samples) |
| Calibration | Available upon request - contact NRG for more information. | Calibration report supplied |
| Output signal range | 0 Hz to 155 Hz | 0 Hz to 155 Hz |
RESPONSE CHARACTERISTICS |
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| Distance constant (63% recovery) | n/a | 7.6 m (25 feet) |
POWER REQUIREMENTS |
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| Heater supply voltage |
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| Heater supply current |
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INSTALLATION |
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| Mounting | Mounts to a 27 mm (1.05 inch) diameter (3/4 inch IPS) pipe with a 5/16 inch nut and bolt; cabling exits into mounting pipe | Mounts to a 27 mm (1.05 inch) diameter (3/4 inch IPS) pipe with a 5/16 inch nut and bolt; cabling exits into mounting pipe |
| Tools required | 13 mm (0.5 inch) nut driver | 13 mm (0.5 inch) nut driver |
ENVIRONMENTAL |
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| Operating temperature range | -40 °C to 60 °C (-40 °F to 140 °F) | -40 °C to 60 °C (-40 °F to 140 °F) |
| Operating humidity range | 0 to 100% RH | 0 to 100% RH |
PHYSICAL |
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| Connections | Signal Cable
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Signal Cable
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| Cable length |
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| Weight | 1.45 kg (3.2 pounds) | 1.45 kg (3.2 pounds) |
| Dimensions |
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MATERIALS |
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| Cups | Precision balanced aluminum with black anodized finish and heat-resistant black paint | Precision balanced aluminum with black anodized finish and heat-resistant black paint |
| Body | Cast aluminum with black anodized finish and heat-resistant black paint | Cast aluminum with black anodized finish and heat-resistant black paint |
| Shaft | Centerless ground, stainless steel | Centerless ground, stainless steel |
| Bearing | Stainless steel ball bearings with application specific lubrication | Stainless steel ball bearings with application specific lubrication |
| Magnet | 4 pole ceramic | 4 pole ceramic |
| Coil | Single coil, shielded for ESD protection | Single coil, shielded for ESD protection |
| Cable |
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| Enclosure |
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| Heater | Fully encapsulated, self-regulating | Fully encapsulated, self-regulating |
| Base | Cast aluminum with black anodized finish and heat-resistant black paint | Cast aluminum with black anodized finish and heat-resistant black paint |
- Made of cast aluminum with black anodized finish and heat-resistant paint
- Efficiently transfers heat from encapsulated, self-regulating heaters
- Easily mounts to a 27 mm (1.05") diameter mounting pipe
- Powered by 24V AC or DC
- Compatible with a wide range of remote site equipment
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