Product Description
Onset HOBOnet Soil Moisture EC-5 Sensor - RXW-SMC-900
Overview
The HOBOnet Wireless Soil Moisture Sensor integrates the field-proven ECH2O EC5 Sensor and provides readings directly in volumetric water content. The sensor's high-frequency design minimizes sensitivity to salinity and textural effects, and gives it a wide measurement range. HOBOnet Wireless Sensors communicate data directly to the 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, Onsets innovative cloud-based software platform.
- ±3% accuracy in typical soil conditions, and ±2% accuracy with soil-specific calibration
- Measures a 0.3-liter volume of soil for taking readings at a specific depth or in a container
- High-frequency (70 MHz) circuit provides good accuracy even in high-salinity and sandy soils
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 - Sinmple 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
This sensor operates in an outdoor environment.
What measurements does this data logger support?
The RXW-SMC-xxx sensor supports the following measurements: Soil Moisture
| Measurement Range | In soil: 0 to 0.550 m³/m³ (volumetric water content) |
| Extended Range | -0.401 to 2.574 m³/m³ |
| Accuracy | ±0.031 m³/m³ (±3.1%) typical 0 to 50°C (32° to 122°F) for mineral soils up to 8 dS/m and ±0.020 m³/m³ (±2%) with soil specific calibration; see Notes 2 and 3 |
| Resolution | 0.0007 m³/m³ (0.07%) |
| Volume of Influence | 0.3 liters (10.14 oz) |
| Sensor Frequency
| 70 MHz |
| Operating Temperature Range | -25° to 60°C (-13° to 140°F) |
| 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 | RXMOD-RXW-900: 904924 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 | Powered by the RX3000 station |
| Dimensions | Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches) |
| Weight | Mote: 159 g (5.62 oz) |
| Materials | Mote: PCPBT, silicone rubber seal |
| Environmental Rating | Mote: IP67, NEMA 6 |
| Compliance Marks | |
RXMOD-RXW-900
RXMOD-RXW-868
RXMOD-RXW-922
