To see the full specifications for this product, please see our product manual found under the documentation tab if available
Sensor
| 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. |
Wireless Mote
| 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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