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Part Numbers
RXW-LWA-900
•RXW-LWA-868
•RXW-LWA-922
•RXW-LWA-921
HOBOnet Leaf Wetness Sensor
$359.00 USD
A wireless sensor that provides accurate leaf wetness data for a variety of growing and research applications; ready to use, requires no painting or coating.
Important Information
A complete system requires at least one HOBO RX3000 Remote Monitoring Station, a HOBOnet Wireless Manager, and a HOBOnet Wireless Sensor, OR one HOBO MicroRX Station (which has an integrated HOBOnet Wireless Manager) and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RXW-RPTR-xxx or RXW-RPTR-B-xxx) can be added to extend the range.
Overview
Provides accurate leaf wetness data for a variety of growing and research applications. This preconfigured, ready-to deploy sensor requires no painting or coating, uses a capacitive grid that is less sensitive to surface residues than resistive grid-based sensors, and comes preconditioned for long-term stability and consistent measurements between sensors.
HOBOnet wireless sensors communicate data directly to the HOBO RX3000 or the HOBO MicroRX station or pass data through other wireless sensors back to the central station. Data is accessed through HOBOlink, Onset's innovative cloud software platform.
Features
Sensor Features
- Does not require any painting or coating
- Preconditioned for consistent measurements
- 3-meter cable and mounting bracket included
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 or 336 data channels per HOBO RX station
- 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
Specifications
Sensor
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0 (dry) to 100% (wet)
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Capacitive grid
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±10%
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±5%; see Note 1
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0.59%
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< ±5% per yearin typical growth conditions
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3 years in typical growth conditions
Measurement Range
Sensor Type
Interchangeability Between Sensors (Over the Range 10-90% Wet)
Repeatability
Resolution
Stability (Drift)
Service Life
Wireless Mote
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-25° to 60°C (-13° to 140°F) with rechargeable batteries
-40 to 70°C (-40 to 158°F) with lithium batteries
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12.6 mW (+11 dBm) non-adjustable
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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
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IEEE 802.15.4
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RXW-LWA-900: 904-924 MHz
RXW-LWA-868: 866.5 MHz
RXW-LWA-922: 916-924 MHz
RXW-LWA-921: 921 MHz
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OQPSKOffset Quadrature Phase Shift Keying
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Up to 250 kbps, non-adjustable
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<1%
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Up to 50 wireless sensors or 336 data channels per one HOBO RX station
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1 minute to 18 hours
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2
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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)
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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
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16 MB
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Sensor grid: 4.7 x 5.1 cm (1.8 in x 2.0 inches)
Sensor housing: 12.2 x 1.8 cm (4.8 in x 0.7 inches)
Mounting bracket: 20 x 3 x 0.5 cm (8 x 1.3 x 0.2 inches)
Cable length: 2 m (6.56 ft)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
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Sensor and cable: 127 g (4.5 oz); with bracket: 290 g (10.2 oz)
Mote: 223 g (7.87 oz)
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Sensor: PVC housing, epoxy potting compound, nylon grommet, FR-4 circuit board, PVC cable jacket
Bracket: PVC mounting bracket, UV-stable nylon cable ties, zinc dichromate plated steel U-bolts
Mote: PCPBT, silicone rubber seal
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Sensor and cable: Weatherproof
Mote: IP67, NEMA 6
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
Dimensions
Weight
Materials
Environmental Rating
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Compatible items
Web-based Monitoring Systems - via remote communication
Communications
Mounting
Batteries
Grounding Wires
What's in the box
- HOBOnet Leaf Wetness sensor
- Zip ties and screws for mounting
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