Leaf Wetness Sensor
Price on request
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.
- 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)
Saves this product and the next ones you view in this browser, up to eight, for 30 days. You can disable it under “History” in the footer.
History is enabled in this browser. History
Overview
A complete system requires at least one HOBO RX3000 Remote Monitoring Station, a HOBOnet Wireless Manager (RXMOD-RXW-xxx), and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RX-RPTR-xxx) can be added to extend the range.
Highlighted Features
Does not require any painting or coating
Preconditioned for consistent measurements
3-meter cable and mounting bracket included
Wireless Features
868 MHz wireless mesh self-healing technology
450 to 600 meter 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-LWA-xxx sensor supports the following measurement: Leaf Wetness
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 | 
RXW-WCG-900 |
| 
RXW-WCG-868 |
| 
RXW-WCG-922
Specifications
| Property | Value |
|---|---|
| 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 |
| 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-LWA-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 |
| 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 grid: 4.7 x 5.1 cm (1.8 in x 2.0 inches) |
| Weight | Sensor and cable: 127 g (4.5 oz); with bracket: 290 g (10.2 oz) |
| Materials | Sensor: PVC housing, epoxy potting compound, nylon grommet, FR-4 circuit board, PVC cable jacket |
| Environmental Rating | Sensor and cable: Weatherproof |
| Compliance Marks |  RXW-WCG-900 |
Documents
PDF · 542 kB
PDF · 79 kB
Applications
Applications
Measurements
Related products
LI-COR (HOBO, InTemp, LI-COR) · HOBOnet
Sistema HOBOnet Sensores inalámbricos hasta 600m de alcance
El NUEVO Sistema de Monitorización de Campo HOBOnet de Onset proporciona una solución rentable y escalable para la monitorización de las condiciones de campo a través de la web para aplicaciones tales como la gestión de cultivos, investigación y operaciones…
LI-COR (HOBO, InTemp, LI-COR) · RXW-SMD-868
HOBO HOBOnet Soil Moisture 10HS Sensor
The HOBOnet Wireless Soil Moisture Sensor integrates the field-proven ECH2O™ 10HS Sensor and provides readings directly in volumetric water content. The 10cm probes measure soil moisture over a larger volume of soil, helping to average out any soil…
LI-COR (HOBO, InTemp, LI-COR) · RXMOD-RXW-868
HOBOnet Manager
The HOBOnet Wireless Manager module is installed in an RX3000 station. Data is transmitted wirelessly from sensors across the network to the RX3000 station and then uploaded to HOBOlink, Onset’s innovative cloud-based software platform.
What do you need to measure?
Tell EIC Controls about your application.