Sebuah sensor nirkabel yang tahan lama, bekerja dengan sistem HOBOnet untuk mengukur kelembapan tanah, suhu, dan konduktivitas listrik; serta dapat bertahan hingga 10 tahun di lapangan.
Pengukuran kelembapan tanah (volumetric water content), suhu tanah, dan konduktivitas listrik dalam satu perangkat
Sensor dapat bertahan hingga 10 tahun di lapangan
Volume pengaruh terbesar (1010 mL) relatif terhadap ukuran sensor, menghasilkan pengukuran kelembapan tanah yang lebih akurat
Instalasi mudah dengan probe baja tahan karat yang diasah, lebih tahan terhadap kerusakan/penyusutan
Variasi antar-sensor lebih kecil
Teknologi jaringan mesh nirkabel 900 MHz dengan kemampuan self-healing
Jangkauan nirkabel 450 hingga 600 meter (1.500 hingga 2.000 kaki) dan hingga lima hop
Hingga 50 sensor nirkabel atau 336 kanal data per stasiun HOBO RX
Tombol sekali tekan untuk bergabung ke jaringan nirkabel HOBOnet
Memori internal untuk memastikan tidak ada kehilangan data
Ditenagai baterai AA isi ulang dan panel surya bawaan
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 | 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 |
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, epoxy, stainless pins Cable: PVC (UV resistant, rodent repellent) Mote: PCPBT, silicone rubber seal |
| Environmental Rating | Mote: IP67, NEMA 6 |
