| Wireless Mote | . |
|---|---|
| Operating Temperature Range | -25° to 60°C 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 | 921 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 1.2V 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 |
| Battery Life | With NiMH batteries: Typical 3–5 years when operated in the temperature range -20° to 40°C 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 |
| Dimension | Sensor: 4.1 cm height x 3.2 cm diameter (1.61 x 1.26 inches) |
| Weight | Sensor and cable: 109 g (3.85 oz) |
| Material | Sensor: Anodized aluminum housing with acrylic diffuser and O-ring seal |
| Environmental Rating | Sensor: Weatherproof |
| 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 |
HOBOnet Leaf Wetness Sensor
Overview
he 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 RX 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
- 921 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 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
Important Info:
A complete system requires at least one HOBO RX Remote Monitoring Station, a HOBOnet Wireless Manager (RXMOD-RXW-921), and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RX-RPTR-921) can be added to extend the range.
