HOBOnet Wind Speed and Direction Sensor

The HOBOnet Wireless Wind Speed and Direction Sensor records wind speed, wind gust, and wind direction. HOBOnet Wireless Sensors communicate data directly to the RX3000 weather 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.

Sensor Features:

- Provides average wind speed, highest 3-second wind gust, and average wind direction for the measurement interval
- Designed to meet World Meteorological Organization (WMO) guidelines

Wireless Features:
- 922 MHz wireless mesh self-healing technology
- 450 to 600 meter (1,500 to 2,000 feet) wireless range and up to five hops
- Up to 50 wireless sensors per RX3000
- Simple button-push to join the HOBOnet wireless network
- Onboard memory to ensure no data loss
- Powered by rechargeable AA batteries and built-in solar panel
- In what environment does this sensor operate?
- This sensor operates in indoor, outdoor and underwater environments.

What measurements does this sensor support?
- The RXW-TMB-xxx sensor supports the following measurements: Rainfall

Important Info:
- A complete system requires at least one HOBO RX3000 Remote Monitoring Station, a HOBOnet Wireless Manager (RXMOD-RXW-xxx), and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RX-RPTR-xxx) can be added to extend the range.

Specifications

Wind speed/Gust:

- Measurement Range: 0 to 76 m/sec (0 to 170 mph)
- Accuracy: +/- 1.1 m/sec (+/- 2 mph) or +/- 5% of reading, whichever is greater
- Resolution: 0.5 m/sec (1.1 mph)
- Starting Threshold: ?1 m/sec (2.2 mph)
- Turning Radius: 108 mm (4.25 in.)

Wind Speed/Gust measurement definition:

- Cup revolutions are accumulated 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

Wind direction:

- Measurement Range: 0 to 355 degrees
- Accuracy: +/- 7 degrees
- Resolution: 1.4 degrees (0 to 355 degrees)
- Starting Threshold: 1 m/sec (2.2 mph)
- Turning Radius: Approximately 135 mm (5.25 in.)

Wind direction measurement definition:

- Unit vector averaging used; vector components for each wind measurement are calculated every three seconds for duration of logging interval

Wireless Mote specifications:

- 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-TMB-922: 916 to 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: 50 motes per one RX Wireless Sensor Network
- Battery Type/Power Source: 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 to 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
- Battery Life (With lithium batteries): 1 year, typical use
- Memory: 16 MB
- Dimensions (Sensor): 470 x 191 x 121 mm (18.5 x 7.5 x 4.75 in.)
- Dimensions (Cable length): 3 m (9.8 ft)
- Dimensions (Mote): 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
- Weight: Sensor and cable: 1.332 kg (2 lb, 15 oz)
- Materials (Sensor): Stainless steel waterproof tip
- Materials (Mote): PCPBT, silicone rubber seal
- Environmental Rating (Sensor and cable): Immersion in water up to 50 C (122 F) for 1 year
- Environmental Rating (Mote): IP67, NEMA 6