HOBOnet Wireless Temp/RH Sensor

RXW-THC-B-868

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 RX 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.

Highlighted Features

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

    868 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 RX Station
    Simple button-push to join the HOBOnet wireless network
    Onboard memory to ensure no data loss
    Powered by 2 user-replaceable lithium AA batteries

The RXW-THC-B-xxx sensor supports the following measurements: Dew Point, Relative Humidity and Temperature

Sensor Temperature RH
Measurement Range -40°C to 75°C (-40°F to 167°F) 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 ±0.25°C from -40° to 0°C (±0.45°F from -40° to 32°F)
±0.20°C from 0° to 70°C (±0.36°F from 32° to 158°F)
±0.25°C from 70° to 100°C (±0.45°F from 158° to 212°F)		 ±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 0.02°C (0.036°F) 0.01% RH
Drift <0.01°C (0.018°F) per year <1% per year typical
Response Time (typical, to 90% of change) 3 minutes, 45 seconds in air moving 1 m/s 15 seconds in air moving 1 m/s
Wireless Mote
Operating Temperature Range -40 to 70°C (-40 to 158°F)
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-B-900: 904–924 MHz
RXW-THC-B-868: 866.5 MHz
RXW-THC-B-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 HOBOnet wireless sensor network
Battery Type Two AA 1.5 V lithium batteries
Battery Life 1 year, typical use
Memory 16 MB
Dimensions Sensor: 45.97 x 11.43 x 10.16 mm (1.81 x 0.45 x 0.40 inches)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
Weight 223 g (7.87 oz)
Materials Sensor: Polyamide
Mote: PCPBT, silicone rubber seal
Environmental Rating IP67, NEMA 6
Compliance Marks Federal Communication Commission     RXW-THC-B-900
European Union Compliance     RXW-THC-B-868
Australia and New Zealand Complicance     RXW-THC-B-922

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