| General Specification |
| Sensor |
| |
Wind Speed/Gust |
Wind Direction |
| Measurement Range |
0 to 76 m/sec (0 to 170 mph) |
0 to 355 degrees |
| Accuracy |
±1.1 m/sec (±2 mph) or ±5% of reading,
whichever is greater |
±7 degrees |
| Resolution |
0.5 m/sec (1.1 mph) |
1.4 degrees (0 to 355 degrees) |
| Starting Threshold |
≤1 m/sec (2.2 mph) |
1 m/sec (2.2 mph) |
| Turning Radius |
108 mm (4.25 in.) |
Approximately 135 mm (5.25 in.) |
| 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 |
Unit vector averaging used; vector components for each wind measurement are calculated every three seconds for duration of logging interval |
| Wireless Mote |
| Operating 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-THC-900: 904–924 MHz
RXW-THC-868: 866.5 MHz
RXW-THC-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 |
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 3–5 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: 470 x 191 x 121 mm (18.5 x 7.5 x 4.75 in.)
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: 1.332 kg (2 lb, 15 oz)
Mote: 223 g (7.87 oz) |
| Materials |
Sensor: Polycarbonate wind cups, sealed stainless steel bearing, UV-resistant ABS wind vane and black-anodized aluminum anemometer arm
Mote: PCPBT, silicone rubber seal |
| Environmental Rating |
Sensor: Weatherproof
Mote: IP67, NEMA 6 |
| Compliance Marks |
RXW-THC-900
RXW-THC-868
RXW-THC-922 |