DAVIS sensor adapter speed and wind direction for HOBOnet network RXW-WCG-868

THE'davis sensor adapter is a speed sensor and wind direction wireless ultrasound that works with HOBOnet.
Compact and robust, without moving parts, this ultrasonic sensor can measure speeds of very low wind, up to 0.4 m/s (compared to 1.0 m/s for our mechanical sensors).
The wireless sensors HOBOnet communicates the data directly to the HOBO RX3000 or to hOBO MicroRX station or transmit data via other wireless sensors to the central station.
They are preconfigured and ready for deployment, the data are accessible via HOBOlink, the innovative cloud software platform of'Onset.

Sensor characteristics:

- Compact and robust without moving parts
- No starting threshold
- suitable for low wind speeds
- No dead wind direction strip
- accurate wind data in all directions
- Powered by its own integrated solar panel

1. Wind speed / gust:

- Measuring range: 0 to 41.16 m/s (0 to 92.07 mph)
- Accuracy ±0.8 m/s (1.79 mph) or ±4 per cent of reading, whichever is higher
- Resolution: 0.4 m/s (0.89 mph)
- Definition of measurement: wind speed readings are taken every three seconds during the recording interval.
Wind speed: average speed for the entire recording interval.
Speed of gust : the highest wind over three seconds recorded during the recording interval.
See Measurement Operation.
- Operating temperature range without icing: -15°C at 55°C (5°F at 131°F)

2. Wind direction:

- Measuring range: 0 to 359 degrees
- Accuracy :
0.2-3 m/s (0.44-6.7 mph): ±4 degrees
>3 m/s (6.7 mph): ±2 degrees
- Resolution: 1 degree (0 to 359 degrees)
- Definition of measurement: unit vector average used; vector components for each wind measurement are calculated every three seconds for the duration of the recording interval (see Measurement Operation)

Wireless Features:

- 868 MHz wireless mesh self-healing technology
- Wireless range from 450 to 600 metres (1,500 to 2,000 feet) and up to five jumps
- Up to 50 wireless sensors or 336 data channels per HOBO RX station
- Just press a button to join the HOBOnet wireless network
- Onboard memory to avoid data loss
- Powered by rechargeable AA batteries and integrated solar panel
- 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) not adjustable
- Transmission range:
Reliable connection to a 457.2 m (1,500 ft) sight line at a height of 1.8 m (6 ft)
Reliable connection to a 609.6 m (2 000 ft) sight line at a height of 3 m (10 ft)
- Wireless data standard: IEEE 802.15.4
- Radio operating frequencies RXW-WCG-868: 866.5 MHz
- Modulation employed: OQPSK (decalation of modulation by quadrature phase displacement)
- Data flow rate: up to 250 kbps, not adjustable
- Service cycle: - Maximum number of points: up to 50 wireless sensors or 336 data channels per HOBO RX station
- Log rate: 1 minute at 6 p.m
- Number of data channels : 4
- Type of battery / power source:
Sensor: Photovoltaic panel, LIFEP04 battery 3.2 V -600 mAh
Mote: 2 rechargeable NiMH 1.2 V AA batteries powered by integrated solar panel
or
2 1.5 V AA lithium batteries for operating conditions from -40 to 70°C (-40 to 158°F)
- Battery life:
With NiMH batteries : Typically 3 to 5 years when used in a temperature range of -20° to 40°C (-4°F to 104°F) and positioned towards the sun (see Deployment and mounting), operation outside this range will reduce battery life
With lithium batteries : 1 year, typical use
- Memory : 16 MB
- Dimensions:
Sensor length: 380 mm (14.96 inches)
Diameter of sensor head: 60 mm (2.36 inches)
Diameter of sensor rod: 16 mm (0.63 inches)
Cable length: 3 m (9.8 feet)
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)
Sensor: 223 g (7.87 oz)
- Materials:
Sensor: Polyacetal
Mote: PPCBT, silicone rubber seal
- Environmental Assessment: IP67, NEMA 6

Contents of the box:

- Ultrasonic wind speed and direction sensor HOBOnet
- Zip hooks and screws for mounting