HOBOnet Wireless Temperature & Relative Humidity Sensor (Battery & Solar Powered)
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| Measurements | Evapotranspiration, Humidity, Temperature |
|---|
| 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% |
|
Accuracy |
±0.25°C from -40° to 0°C (±0.45°F from -40° to 32°F) |
±2.5% from 10% to 90% RH typical to a maximum of ±3.5% including hysteresis at 25°C (77°F); |
|
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 |
Without solar radiation shield: 2 minutes, |
5 minutes in air moving 1 m/sec with protective cap |
|
Operating Temperature Range |
-25° to 60°C (-13° to 140°F) with rechargeable 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 |
|
Wireless Data Standard |
IEEE 802.15.4 |
|
Radio Operating Frequencies |
RXW-THC-900: 904–924 MHz |
|
Modulation Employed |
OQPSK (Offset Quadrature Phase Shift Keying) |
|
Data Rate |
Up to 250 kbps, non-adjustable |
|
Duty Cycle |
<1% |
|
Maximum Number of Motes |
50 motes per one RX Wireless Sensor Network |
|
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 |
|
Memory |
16 MB |
|
Dimensions |
Sensor: 5.1 x 33 mm (0.2 x 1.3 inches) |
|
Weight |
Sensor and cable: 110 g (3.88 oz); |
|
Materials |
Sensor: Polyamide |
|
Environmental Rating |
Sensor: Weatherproof: 0 to 100% RH intermittent condensing environments. For best results, the sensor should be mounted inside a protective enclosure, such as a solar radiation shield. Mote: IP67, NEMA |
|
Compliance |
RXW-THC-868 |
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The HOBOnet Wireless Temperature and Relative Humidity (RH) Sensor provides a cost-effective and scalable solution for web-enabled monitoring of air temperature and humidity.
HOBOnet Wireless Sensors communicate data directly to the RX3000 weather station or pass data through other wireless sensors back to the central station. They are preconfigured and ready to deploy, and data is accessed through HOBOlink, Onset’s innovative cloud-based software platform.
Sensor Features
- High accuracy: ± 0.2°C (± 0.36°F) and ± 2.5% RH
- Robust RH sensor withstands extended use in high-humidity environments
Wireless Features
- 900 MHz wireless mesh self-healing technology
- 450 to 600 meter (1,500 to 2,000 feet) wireless range and up to five hops
- Up to 50 wireless sensors per RX3000
- Simple button-push to join the HOBOnet wireless network
- Onboard memory to ensure no data loss
- Powered by rechargeable AA batteries and built-in solar panel
The RXW-THC-868 sensor supports the following measurements: Evapotranspiration, Relative Humidity and Temperature
Note: A complete HOBOnet system requires at least one HOBO RX3000 Remote Monitoring Station, a HOBOnet Wireless Manager, and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters can be added to extend the range.
For full specifications for this product, please see the User Manual found under the Resources tab below.