HOBOnet Temp/RH Sensor

The HOBOnet Wireless Temperature and Relative Humidity Sensor provides a cost-effective and scalable solution for web-enabled monitoring of air temperature and humidity. HOBOnet Wireless Sensors communicate data directly to the RX3000 weather station or pass data through other wireless sensors back to the central station.

Sensor Features:

– High accuracy: +/- 0.2 C (+/- 0.36 F) and +/- 2.5% RH
– Robust RH sensor withstands extended use in high-humidity environments 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 an outdoor environment. What measurements does this sensor support? – The RXW-SMC-xxx sensor supports the following measurement: Evapotranspiration, Relative Humidity and Temperature 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. Sensor specifications Temperature: – Measurement Range: -40 C to 75 C (-40 F to 167 F)- Accuracy (-40 to 0 C): +/- 0.25 C (+/- 0.45 F from -40 to 32 F)- Accuracy (0 to 70 C): +/- 0.20 C (+/- 0.36 F from 32 to 158 F) – Accuracy (70 to 100 C): +/- 0.25 C (+/- 0.45 F from 158 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: 3 minutes, 45 seconds in air moving 1 m/sec/With RS3-B solar radiation shield: 6 minutes, 30 seconds in air moving 1 m/sec Humidity: – Measurement Range: 0?100% RH at -40 to 75 C (-40 to 167 F); exposure to conditions below -20 C (-4 F) or above 95%. RH may temporarily increase the maximum RH sensor error by an additional 1%- Accuracy: +/- 2.5% from 10% to 90% RH typical to a 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): Without solar radiation shield: 15 seconds in air moving 1 m/sec/With RS3-B solar radiation shield: 30 seconds in air moving 1 m/sec Wireless 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-SMC-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- Battery Life (With lithium batteries): 1 year, typical use- Memory: 16 MB- Dimensions (Cable length): 5 m (16.4 ft)- Dimensions (Mote): 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)- Weight: Mote: 223 g (7.87 oz)- Materials (Sensor): Weatherproof- Materials (Mote): PCPBT, silicone rubber seal- Environmental Rating: Mote: IP67, NEMA 6- Compliance Marks: Australia and New Zealand Compliance RXW-SMC-922