HOBOnet® Wireless Sensor Network
RXW Temperature/RH Sensor (RXW-THC-B-xxx) Manual
24501-C
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
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-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
Motes
Up to 50 wireless sensors or 336 data channels per one HOBO RX station
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
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
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