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HOBOnet® Wireless Sensor Network
RXW Temperature Sensor (RXW-TMB-xxx) Manual
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)
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
Without solar radiation shield: 2 minutes, 30 seconds in air moving 1
90% of change)
m/sec
With RS3-B solar radiation shield: 5 minutes in air moving 1 m/sec
Wireless Mote
Operating Temperature
-25° to 60°C (-13° to 140°F) with rechargeable batteries
Range
-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
RXW-TMB-900: 904–924 MHz
Frequencies
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
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
2
Battery Type/
Two AA 1.2 V rechargeable NiMH batteries powered by built-in solar
Power Source
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
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Table of Contents
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Summary of Contents for Hobo HOBOnet RXW-TMB Series
- Page 1 HOBOnet® Wireless Sensor Network RXW Temperature Sensor (RXW-TMB-xxx) Manual 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.
- Page 2 RXW Temperature Sensor (RXW-TMB-xxx) Manual Specifications (continued) Compliance Marks RXW-TMB-900: See last page RXW-TMB-868: The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). RXW-TMB-921: See last page RXW-TMB-922: See last page Mote Components and Operation network registration process is complete, the blue LED blinks at 4 seconds to indicate normal operation.
- Page 3 RXW Temperature Sensor (RXW-TMB-xxx) Manual Adding the Mote to the HOBOnet Wireless 6. Watch the LCD on the mote. Sensor Network The mote must join a HOBOnet Wireless Sensor Network before it can begin measuring temperature and transmitting data. This requires accessing the station and the mote at the same time so it is recommended that you complete these steps This signal strength icon Once a network is found,...
- Page 4 • Make sure the mote is clean. Wipe off any dust or grime • The HOBOnet Wireless Sensor Network can support up to with a damp cloth. 50 wireless sensors or 336 data channels per one HOBO • Wipe off any water before opening the mote. RX station.
- Page 5 RXW Temperature Sensor (RXW-TMB-xxx) Manual data, then it may be damaged or worn out if it has been in use fresh rechargeable batteries. Note: if you install used for several years. rechargeable batteries that together are less than 2.3 V, the mote will not resume operation.
- Page 6 ISM radio wave radiated devices. © 2018–2020 Onset Computer Corporation. All rights reserved. Onset, HOBO, HOBOnet, and HOBOlink are registered trademarks of Onset Computer Corporation. Mac is a registered trademark of Apple Inc. All other 1-800-LOGGERS (564-4377) •...
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