RXW Leaf Wetness Sensor
- Model: RXW-LWA-868
- Weight: 223.00g
- Dimensions: 8.59cm x4.14cm x16.20cm
- MPN: RXW-LWA-868
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 or the HOBO MicroRX 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
- 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 (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
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
| Sensor | |
| Accuracy | ±5% |
| Interchangeability Between Sensors (Over the Range 10-90% Wet) | ±10% |
| Measurement Range | 0 (dry) to 100% (wet) |
| Resolution | 0.59% |
| Sensor Type | Capacitive grid |
| Service Life | 3 years in typical growth conditions |
| Stability (Drift) | < ±5% per year (in typical growth conditions) |
| Wireless Mote | |
| 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 |
| 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) |
| Data Rate | Up to 250 kbps, non-adjustable |
| Dimensions | Sensor grid: 4.7 x 5.1 cm (1.8 in x 2.0 inches) |
| Duty Cycle | <1% |
| Environmental Rating | Sensor and cable: Weatherproof |
| Logging Rate | 1 minute to 18 hours |
| Materials | Sensor: PVC housing, epoxy potting compound, nylon grommet, FR-4 circuit board, PVC cable jacket |
| Maximum Number of Motes | Up to 50 wireless sensors or 336 data channels per one HOBO RX station |
| Memory | 16 MB |
| Modulation Employed | OQPSK (Offset Quadrature Phase Shift Keying) |
| Number of Data Channels | 2 |
| Operating Temperature Range | -25° to 60°C (-13° to 140°F) with rechargeable batteries |
| Radio Operating Frequencies | 866.5 MHz |
| 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 |
| Weight | Sensor and cable: 127 g (4.5 oz); with bracket: 290 g (10.2 oz) |
| Wireless Data Standard | IEEE 802.15.4 |
