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  • RXW-LWA-xxx
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Leaf Wetness Sensor

RXW-LWA-900 • RXW-LWA-868 • RXW-LWA-922
 

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Overview

The HOBOnet Leaf Wetness Sensor provides accurate leaf wetness data for a variety of growing and research applications. The sensor is ready to use and does not require any painting or coating. It 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 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.

Highlighted 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 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

In what environment does this sensor operate?

This sensor operates in an outdoor environment.

What measurements does this sensor support?

The RXW-LWA-xxx sensor supports the following measurement: Leaf Wetness

The HOBOnet Leaf Wetness Sensor provides accurate leaf wetness data for a variety of growing and research applications. The sensor is ready to use and does not require any painting or coating. It 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 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.

Highlighted 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 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

In what environment does this sensor operate?

This sensor operates in an outdoor environment.

What measurements does this sensor support?

The RXW-LWA-xxx sensor supports the following measurement: Leaf Wetness

Learn More

The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available

Sensor
Measurement Range 0 (dry) to 100% (wet)
Sensor Type Capacitive grid
Interchangeability Between Sensors (Over the Range 10-90% Wet) ±10%
Repeatability ±5%; see Note 1
Resolution 0.59%
Stability (Drift) < ±5% per year (in typical growth conditions)
Service Life 3 years in typical growth conditions
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-LWA-900: 904-924 MHz
RXW-LWA-868: 866.5 MHz
RXW-LWA-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 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
With lithium batteries: 1 year, typical use
Memory 16 MB
Dimensions 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)
Weight Sensor and cable: 127 g (4.5 oz); with bracket: 290 g (10.2 oz)
Mote: 223 g (7.87 oz)
Materials 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
Environmental Rating Sensor and cable: Weatherproof
Mote: IP67, NEMA 6
Compliance Marks Federal Communication Commission RXW-WCG-900  
  CE Compliant RXW-WCG-868  
  Australia and New Zealand Complicance RXW-WCG-922  
  • Sensor, along with zip ties and screws for mounting.

The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below. Our user forum can also be a valuable resource for questions, use cases and general feedback. Share with us today, here!

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