Hobo RXW-THC-B Series Manual

HOBOnet® Wireless Sensor Network
RXW Temperature/RH Sensor (RXW-THC-B-xxx) Manual
RXW Temperature/
RH Sensor
Models:
• RXW-THC-B-900 (US)
• RXW-THC-B-868
(Europe)
• RXW-THC-B-921
(Taiwan)
• RXW-THC-B-922
(Australia/NZ)
Included Items:
• Cable ties
• Screws
24501-C
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This sensor 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 the 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.

Specifications

Sensor
Measurement Range -40°C to 75°C (-40°F to 167°F)
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)
Resolution 0.02°C (0.036°F)
Drift <0.01°C (0.018°F) per year
Response Time (typical, to 3 minutes, 45 seconds in air
90% of change)
moving 1 m/s
Wireless Mote
Operating Temperature -40° to 70°C (-40° to 158°F)
Range
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
RXW-THC-B-900: 904–924 MHz
Frequencies RXW-THC-B-868: 866.5 MHz
RXW-THC-B-921: 921 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 Up to 50 wireless sensors or 336 data channels per one HOBO RX station
Motes
Logging Rate 1 minute to 18 hours
Number of Data Channels 3
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
GlobalTestSupply
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Temperature
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%
±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
0.01% RH
<1% per year typical
15 seconds in air moving 1 m/s
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RH