Hoskin EnvironmentalSampling and monitoring instruments for air, water, weather and soil for the environmental, agricultural, mining and research markets.
Hoskin GeotechnicalMaterials and Product testing for soil, asphalt, petroleum, concrete, mining, cement, and research industries.
Hoskin InstrumentationSensors, transducers and instrumentation for industry, manufacturing, research and development and factory automation.
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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 variability. 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 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 software platform.
Wireless Features
In what environment does this sensor operate?
This sensor operates in an outdoor environment.
What measurements does this sensor support?
The RXW-SMD-xxx sensor supports the following measurement: Soil Moisture
HOBOnet Field Monitoring System
The NEW HOBOnet Field Monitoring System from Onset provides a cost-effective and scalable solution for web-enabled monitoring of field conditions for applications such as crop management, research, and greenhouse operations.
| Measurement Range | In soil: 0 to 0.570 m³/m³ (volumetric water content) |
| Extended Range | -0.659 to 0.6026 m³/m³; see Note 1 |
| Accuracy | ±0.033 m³/m³ (±3.3%) typical 0 to 50°C (32° to 122°F) for mineral soils up to 10 dS/m and ±0.020 m³/m³ (±2%) with soil specific calibration; see Notes 4 and 5 |
| Resolution | 0.0008 m³/m³ (0.08%) |
| Volume of Influence | 1 liter (33.81 oz) |
| Sensor Frequency | 70 MHz |
| Sensor Operating Temperature Range | 0° to 50°C (32° to 122°F). Although the sensor probe and cable can safely operate at below-freezing temperatures (to -40°C/F), the soil moisture data collected at these extreme temperatures is outside of the sensor’s accurate measurement range. Extended temperatures above 50°C (122°F) will decrease mote battery life. |
| 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-SMD-900: 904–924 MHz RXW-SMD-868: 866.5 MHz RXW-SMD-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 1.2V 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 (-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 | RXW-SMD-xxx soil probe: 89 x 15 x 1.5 mm (3.5 x 0.62 x 0.06 in.) Cable length: 5 m (16.4 ft) Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches) |
| Weight | RXW-SMD-xxx sensor and cable: 180 grams (6.3 oz) Mote: 223 g (7.87 oz) |
| Materials | Sensor: Weatherproof Mote: PCPBT, silicone rubber seal |
| Environmental Rating | Mote: IP67, NEMA 6 |
| Compliance Marks | RXW-SMD-900 RXW-SMD-868 RXW-SMD-922 |
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