The The Onset HOBO RXW-THC-900 HOBOnet Wireless Temperature and Relative Humidity (RH) Sensor for RX3000 Stations measures temperature and RH and is designed to work with the HOBOnet Wireless Sensor Network, in which data is transmitted wirelessly from the sensor mote across the network to an RX3000 station and then uploaded to HOBOlink web-based software. With HOBOlink, you can monitor sensor readings, view graphs, set up alarms, download data, and more.
Measurement range: -40 °C to 75 °C (-40 °F to 167 °F)
Accuracy: ±0.25°C from -40 °C to 0 °C (±0.45 °F from -40 °F to 32 °F); ±0.20 °C from 0 °C to 70 °C (±0.36 °F from 32 °F to 158 °F); ±0.25 °C from 70 °C to 100 °C (±0.45 °F from 158 °F to 212 °F)
Resolution: 0.02 °C (0.036 °F)
Drift: < 0.01 °C (0.018 °F) per year
Response time (typical, to 90% of change): Without solar radiation shield: 2 minutes, 30 seconds in air moving 1 m/sec; With RS3-B solar radiation shield: 5 minutes in air moving 1 m/sec
Measurement range: 0 to 100% RH at -40 C° to 75 °C (-40 °F to 167 °F); exposure to conditions below -20 °C (-4 °F) or above 95% RH may temporarily increase maximum RH sensor error by additional 1%
Accuracy: ±2.5% from 10% to 90% RH typical to maximum of ±3.5% including hysteresis at 25 °C (77 °F); below 10% and above 90% ±5% typical
Resolution: 0.01% RH
Drift: <1% per year typical
Response time (typical, to 90% of change): 5 minutes in air moving 1 m/sec with protective cap
Wireless Mote:
Operating temperature range: -25° C to 60 °C (-13 °F to 140 °F) with rechargeable batteries; -40 °C to 70 °C (-40 °F 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
Maximum number of motes: 50 motes per one RX Wireless Sensor Network
Battery type/Power source: Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar panel or two AA 1.5 V lithium batteries for operating conditions of -40 °C to 70 °C (-40 °F to 158 °F)
Memory: 16 MB
Sensor materials: Polyamide
Mote materials: PCPBT, silicone rubber seal
Sensor environmental rating: Weatherproof: 0 to 100% RH intermittent condensing environments; For best results, sensor should be mounted inside protective enclosure, such as solar radiation shield
Mote environmental rating: IP67, NEMA 6
Environments: Outdoor
Measurements: Soil Moisture
Environments: Outdoor
Measurements: Evapotranspiration, Relative Humidity (RH) and Temperature