Hobo RXW-THC Series Manual

HOBOnet® RX Wireless Sensor Network
RXW Temperature/RH Sensor (RXW-THC-xxx) Manual
RXW Temperature/
RH Sensor
Models:
• RXW-THC-900 (US)
• RXW-THC-868 (Europe)
• RXW-THC-921 (Taiwan)
• RXW-THC-922
(Australia/NZ)
Included Items:
• Cable ties
• Screws
Accessories:
• Solar radiation shield
(RS3-B)
22242-F
This sensor measures temperature and RH and is designed to work with the HOBOnet (HOBO®
RX) 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
Accuracy
Resolution
Drift
Response Time (typical, to
90% of change)
Wireless Mote
Operating Temperature
Range
Radio Power
Transmission Range
Wireless Data Standard
Radio Operating
Frequencies
Modulation Employed
Data Rate
Duty Cycle
Maximum Number of
Motes
Logging Rate
Number of Data Channels
Battery Type/
Power Source
Battery Life
Memory
Temperature
-40°C to 75°C (-40°F to 167°F)
±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 75°C (±0.45°F
from 158° to 167°F)
0.02°C (0.036°F)
<0.01°C (0.018°F) per year
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
-25° to 60°C (-13° to 140°F) with rechargeable batteries
-40° to 70°C (-40° to 158°F) with lithium batteries
12.6 mW (+11 dBm) non-adjustable
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
IEEE 802.15.4
RXW-THC-900: 904–924 MHz
RXW-THC-868: 866.5 MHz
RXW-THC-921: 921 MHz
RXW-THC-922: 916–924 MHz
OQPSK (Offset Quadrature Phase Shift Keying)
Up to 250 kbps, non-adjustable
<1%
Up to 50 wireless sensors or 336 data channels per one HOBO RX station
1 minute to 18 hours
3
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° to
70°C (-40° to 158°F)
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
With lithium batteries: 1 year, typical use
16 MB
RH
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
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