HOBOnet® Wireless Sensor Network
RXW Temperature Sensor (RXW-TMB-xxx) Manual
22243-D
This sensor measures temperature 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
-40° to 100°C (-40° to 212°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
90% of change)
Without solar radiation shield: 2 minutes, 30 seconds in air moving 1
m/sec
With RS3-B solar radiation shield: 5 minutes in air moving 1 m/sec
Wireless Mote
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-TMB-900: 904–924 MHz
RXW-TMB-868: 866.5 MHz
RXW-TMB-921: 921 MHz
RXW-TMB-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
2
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
With lithium batteries: 1 year, typical use
Memory
16 MB
Dimensions
Sensor: 5.1 x 33 mm (0.2 x 1.3 inches)
Cable length: 5 m (16.4 ft)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
Weight
Sensor and cable: 82.5 g (2.91 oz)
Mote: 223 g (7.87 oz)
Materials
Sensor: Stainless steel waterproof tip
Mote: PCPBT, silicone rubber seal
Environmental Rating
Sensor and cable: Immersion in water up to 50°C (122°F) for 1 year
Mote: IP67, NEMA 6
RXW Temperature
Sensor
Models:
•
RXW-TMB-900 (US)
•
RXW-TMB-868 (Europe)
•
RXW-TMB-921 (Taiwan)
•
RXW-TMB-922
(Australia/NZ)
Included Items:
•
Cable ties
•
Screws
Accessory:
•
Solar radiation shield
(RS3-B)
