HOBOnet Ultrasonic Wind Speed & Direction Sensor
Overview
The HOBOnet Wireless Ultrasonic Wind Speed & Direction Sensor is compact and rugged with no moving parts. Because this sensor is ultrasonic it can measure very low wind speeds, down to 0.4 m/s (compared to 1.0 m/s for our mechanical sensors). HOBOnet Wireless Sensors communicate data directly to the HOBO RX3000 or the HOBO MicroRX station or pass data through other wireless sensors back to the central station. They are preconfigured and ready to deploy, and data is accessed through HOBOlink, Onset’s innovative cloud-based software platform.
Manufactured by: Onset
Model: HOBOnet Ultrasonic Wind Speed & Direction Sensor
Services offered for this product
- Sales
- Rental
- Installation
- Calibration
- Maintenance
Applications
Wind
Specification
| Sensor | Wind Speed/Gust | Wind Direction |
| Measurement Range | 0 to 41.16 m/s (0 to 92.07 mph) | 0 to 359 degrees |
| Accuracy | ±0.8 m/s (1.79 mph) or ±4% of reading, whichever is greater | 0.2 to 3 m/s (0.44-6.7 mph): ±4 degrees >3 m/s (6.7 mph): ±2 degrees |
| Resolution | 0.4 m/s (0.89 mph) | 1 degree (0 to 359 degrees) |
| Measurement Definition | Wind speed readings are taken every three seconds for the duration of the logging interval Wind speed: Average speed for the entire logging interval Gust speed: The highest three-second wind recorded during the logging interval See Measurement Operation. |
Unit vector averaging used; vector components for each wind measurement are calculated every three seconds for duration of logging interval (see Measurement Operation) |
| Operating Temperature Range Without Icing | -15°C to 55°C (5°F to 131°F) | |
| Wireless Mote | ||
| Operating Temperature Range | -25° to 60°C (-13° to 140°F) with rechargeable batteries -40 to 70°C (-40 to 158°F) with lithium batteries |
|
| Radio Power | 12.6 mW (+11 dBm) non-adjustable | |
| Transmission Range | Reliable connection to 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high Reliable connection to 609.6 m (2,000 ft) line of sight at 3 m (10 ft) high |
|
| Wireless Data Standard | IEEE 802.15.4 | |
| Radio Operating Frequencies | RXW-WCG-900: 904-924 MHz RXW-WCG-868: 866.5 MHz RXW-WCG-921: 921 MHz RXW-WCG-922: 916-924 MHz |
|
| Modulation Employed | OQPSK (Offset Quadrature Phase Shift Keying) | |
| Data Rate | Up to 250 kbps, non-adjustable | |
| Duty Cycle | <1% | |
| Maximum Number of Motes | Up to 50 wireless sensors or 336 data channels per one HOBO RX station | |
| Logging Rate | 1 minute to 18 hours | |
| Number of Data Channels | 4 | |
| Battery Type/ Power Source |
Sensor: Photovoltaic panel, LIFEP04 3.2 V -600 mAh battery Mote: Two AA 1.2 V rechargeable NiMH batteries powered by built-in solar panel or two AA 1.5 V lithium batteries for operating conditions of -40 to 70°C (-40 to 158°F) |
|
| Battery Life | With NiMH batteries: Typical 3-5 years when operated in the temperature range -20° to 40°C (-4°F to 104°F) and positioned toward the sun (see Deployment and Mounting), operation outside this range will reduce the battery service life With lithium batteries: 1 year, typical use |
|
| Memory | 16 MB | |
| Dimensions | Sensor length: 380 mm (14.96 inches) Sensor head diameter: 60 mm (2.36 inches) Sensor rod diameter: 16 mm (0.63 inches) Cable length: 3 m (9.8 ft) Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches) |
|
| Weight | Sensor and cable: 200 g (7 oz) Mote: 223 g (7.87 oz) |
|
| Materials | Sensor: Polyacetal Mote: PCPBT, silicone rubber seal |
|
| Environmental Rating | Sensor and cable: Weatherproof Mote: IP67, NEMA 6 |
|