Características destacadas
Características del sensor
Precisión de ±3% en condiciones típicas del suelo, y precisión de ±2% con calibración específica del suelo
Mide un gran volumen de 1 litro de suelo, proporcionando una imagen más precisa de la humedad media del suelo.
El circuito de frecuencia alta (70 MHz) proporciona una buena precisión incluso en suelos de alta salinidad y arenosos.
Funciones inalámbricas
Tecnología de auto-reparación de malla inalámbrica de 868 MHz
Alcance inalámbrico de 450 a 600 metros y hasta cinco tramos.
Hasta 50 sensores inalámbricos por RX3000
Con sólo pulsar un botón se puede conectar a la red inalámbrica HOBOnet
Memoria integrada para garantizar que no se pierdan datos
Funciona con pilas AA recargables y panel solar integrado
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
