To see the full specifications for this product, please see our product manual found under the documentation tab if available
Sensor
Measurement Range
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In soil: 0 to 0.570 m³/m³ (volumetric water content)
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Extended Range
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-0.659 to 0.6026 m³/m³; see Note 1
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Accuracy
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±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
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Resolution
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0.0008 m³/m³ (0.08%)
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Volume of Influence
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1 liter (33.81 oz)
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Sensor Frequency
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70 MHz
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Sensor Operating Temperature Range
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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.
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Wireless Mote
Operating Temperature Range
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-25° to 60°C (-13° to 140°F) with rechargeable batteries
-40 to 70°C (-40 to 158°F) with lithium batteries
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Radio Power
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12.6 mW (+11 dBm) non-adjustable
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Transmission Range
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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
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Wireless Data Standard
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IEEE 802.15.4
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Radio Operating Frequencies
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RXW-SMD-900: 904–924 MHz
RXW-SMD-868: 866.5 MHz
RXW-SMD-922: 916–924 MHz
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Modulation Employed
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OQPSK (Offset Quadrature Phase Shift Keying)
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Data Rate
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Up to 250 kbps, non-adjustable
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Duty Cycle
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<1%
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Maximum Number of Motes
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50 motes per one RX Wireless Sensor Network
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Battery Type/ Power Source
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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)
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Battery Life
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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
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Memory
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16 MB
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Dimensions
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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)
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Weight
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RXW-SMD-xxx sensor and cable: 180 grams (6.3 oz)
Mote: 223 g (7.87 oz)
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Materials
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Sensor: Weatherproof Mote: PCPBT, silicone rubber seal
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Environmental Rating
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Mote: IP67, NEMA 6
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Compliance Marks
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RXW-SMD-900
RXW-SMD-868
RXW-SMD-922
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