Specifications
Soil Moisture: Volumetric Water Content (VWC)
- Measurement Range: 0.00 to 0.70 m³/m³ in mineral soils
- Accuracy: ±0.030 m³/m³ (±3%) typical from 0 to 50°C (32 to 122°F); ±0.020 m³/m³ (±2%) with soil specific calibration
- Resolution: 0.001 m³/m³
- Dielectric Measurement Frequency: 70 MHz
Temperature
- Measurement Range: -40 to 60°C; -40 to 140°F
- Accuracy: ±0.5°C (0.9°F) from -40 to 0°C (-40 to 32°F); ±0.3°C (0.54°F) from 0 to 60°C (32 to 140°F)
- Resolution: 0.1°C; 0.18°F
Bulk Electrical Conductivity (EC)
- Measurement Range: 0 to 20 dS/m (bulk)
- Accuracy: ±5% of reading + 0.01 dS/m from 0 to 10 dS/m; ±8% of reading from 10 to 20 dS/m
- Resolution: 0.001 dS/m
Wireless Mote
- Operating Temperature Range: Sensor: -40 to 60°C (-40 to 140°F); Mote: -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-T12-900: 904-924 MHz; RXW-T12-868: 866.5 MHz; RXW-T12-921: 921 MHz; RXW-T12-922: 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: Up to 50 wireless sensors or 336 data channels per one HOBO RX station
- Logging Rate: 1 minute to 18 hours
- Number of Data Channels: 4
Battery Type / Power Source
Dua AA 1.2V rechargeable NiMH batteries, powered by built-in solar panel atau dua AA 1.5 V lithium batteries untuk operating conditions -40 to 70°C (-40 to 158°F)
Battery Life
Dengan NiMH batteries: Typical 3-5 years ketika beroperasi pada temperature range -20° to 40°C (-4°F to 104°F) dan diarahkan ke matahari (lihat Deployment and Mounting), operasi di luar rentang ini akan mengurangi umur baterai
Dengan lithium batteries: 1 tahun, penggunaan typical
Memory
16 MB
Dimensions
- Sensor: 7.47 x 9.4 x 2.39 cm (2.94 x 3.7 x 0.94 inches)
- Sensor needle length: 5.4 cm (2.13 inches)
- Sensor needle diameter: 0.32 cm (0.13 inches)
- 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-T12-xxx sensor and cable: 245 grams (8.64 oz)
- Mote: 223 g (7.87 oz)
Materials
- Sensor: ASA plastic body dengan polyurethane epoxy filling dan stainless steel pins
- Cable: PVC, UV resistant, dan rodent repellent
- Mote: PCPBT, silicone rubber seal
Environmental Rating
Mote: IP67, NEMA 6