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: Dielectric Measurement Frequency

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: Tested to IEC IP55 standard
• 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 body with polyurethane epoxy filling and stainless steel pins
• Cable: PVC, UV resistant and rodent repellent
• Mote: PCPBT, silicone rubber seal
• Environmental Rating:Mote: IP67, NEMA 6

Temperature Sensor

• Measurement Range*: -40°C to 75°C
  -40°F to 167°F
• Accuracy:
• ±0.25°C from -40° to 0°C
• ±0.45°F from -40° to 32°F
• ±0.20°C from 0° to 70°C
• ±0.36°F from 32° to 158°F
• ±0.25°C from 70° to 75°C
• ±0.45°F from 158° to 167°F
• Resolution: 0.02°C
  0.036°F
• Drift: <0.01°C per year
  0.018°F per year
• Response Time (typical, to 90% of change): With RS3-B solar radiation shield: 6 minutes, 30 seconds in air moving 1 m/sec

RH Sensor

• Measurement Range: 0–100% RH at -40° to 75°C (-40° to 167°F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
• Accuracy: ±2.5% from 10% to 90% RH typical to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and above 90% ±5% typical
• Resolution: 0.01% RH
• Drift: <1% per year typical
• Response Time (typical, to 90% of change): With RS3-B solar radiation shield: 30 seconds in air moving 1 m/sec

Wireless Mote

• Operating Temperature Range:
• -25° to 60°C with rechargeable batteries
• -13° to 140°F with rechargeable batteries
• -40° to 70°C with lithium batteries
• -40° to 158°F with lithium batteries
• Radio Power: 12.6 mW (+11 dBm) non-adjustable
  +11 dBm non-adjustable
• Transmission Range: Transmission Range
• Wireless Data Standard: IEEE 802.15.4
• Radio Operating Frequencies: RXW-THC-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: 3
• 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 (see Deployment and Mounting), operation outside this range will reduce the battery service life
• Memory: 16 MB
• Dimensions: Cable length: 2 m (6.56 ft)
• Weight: Sensor and cable: 110 g (3.88 oz);
• Materials: Mote: PCPBT, silicone rubber seal
• Environmental Rating: Mote: IP67, NEMA 6

• Measurement Range: 0 to 10.2 cm (0 to 4 in.) per hour, maximum 4,000 tips per logging interval
• Accuracy: ±4.0%, ±1 rainfall count between 0.2 and 50.0 mm (0.01 and 2.0 in.) per hour; ±5.0%, ±1 rainfall count between 50.0 and 100.0 mm (2.0 and 4.0 in.) per hour
• Resolution: 0.01 in.
• 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 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high
• Wireless Data Standard: IEEE 802.15.4
• Wireless Data Standard: IEEE 802.15.4
• Radio Operating Frequencies:
• RXW-RGF-900: 904-924 MHz
• RXW-RGF-868: 866.5 MHz
• RXW-RGF-922: 916-924 MHz
• RXW-RGF-921: 921 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: Logging Rate
• Number of Data Channels: 2
• 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: 1 minute to 18 hours
• Sensor: 16.5 cm opening diameter (6.5 in.) x 24 cm (9.5 in.) high; 214 cm2 (33.2 in.2)
• Cable length: 2 m (6.6 ft)
• Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
• Weight: Sensor and cable: 1.2 kg (2.7 lbs) Mote: 223 g (7.87 oz)
• Materials:
• Sensor: UV-stabilized ABS plastic housing; tipping spoon mechanism with magnetic reed switch pivots on metal shaft
• Mote: PCPBT, silicone rubber seal
• Environmental Rating:
• Sensor: Weatherproof
• Mote: IP67, NEMA 6

• Measurement Range: 0 to 1280 W/m2
• Spectral Range: 300 to 1100 nm
• Accuracy: Typically within ±10 W/m2 or ±5%, whichever is greater in sunlight; Additional temperature induced error ±0.38 W/m2/°C from 25°C (0.21 W/m2/°F from 77°F)
• Angular Accuracy: Cosine corrected 0 to 80 degrees from vertical (see Plot B); Azimuth Error <±2% error at 45 degrees from vertical, 360 degree rotation
• Resolution: 1.25 W/m2
• Drift: <±2% per year
• Wireless Mote: -25° to 60°C (-13° to 140°F) with rechargeable batteries
• Operating Temperature Range: -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-LIB-900: 904–924 MHz
• RXW-LIB-868: 866.5 MHz
• RXW-LIB-922: 916–924 MHz
• RXW-LIB-921: 921 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: 2
• 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: 1 minute to 18 hours
• Sensor: 4.1 cm height x 3.2 cm diameter (1.61 x 1.26 inches)
• Cable length: 2 m (6.56 ft)
• Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
• Weight: Sensor and cable: 109 g (3.85 oz)
• Materials:
• Sensor: Anodized aluminum housing with acrylic diffuser and O-ring seal
• Mote: PCPBT, silicone rubber seal
• Environmental Rating:
• Sensor: Weatherproof
• Mote: IP67, NEMA 6

• Measurement Range:
• Wind Speed/Gust: 0 to 76 m/sec (0 to 170 mph)
• Wind Direction: 0 to 355 degrees
• Accuracy:
• Wind Speed/Gust: ±1.1 m/sec (±2 mph) or ±5% of reading, whichever is greater
• Wind Direction: ±7 degrees
• Resolution: 300 to 1100 nm
• Wind Speed/Gust: 0.5 m/sec (1.1 mph)
• Wind Direction: 1.4 degrees (0 to 355 degrees)
• Starting Threshold:
• Wind Speed/Gust: =1 m/sec (2.2 mph)
• Wind Direction: 1 m/sec (2.2 mph)
• Turning Radius:
• Wind Speed/Gust: 108 mm (4.25 in.)
• Wind Direction: Approximately 135 mm (5.25 in.)
• Measurement Definition:
• Wind Speed/Gust: Cup revolutions are accumulated every three seconds for the duration of the logging interval.
• Wind speed: Average speed for the entire logging interval
• Gust speed: The highest three-second wind recorded during the logging interval
• Wind Direction: Unit vector averaging used; vector components for each wind measurement are calculated every three seconds for duration of logging interval

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 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high
• Wireless Data Standard: IEEE 802.15.4
• Radio Operating Frequencies:
• RXW-WCF-900: 904-924 MHz
• RXW-WCF-868: 866.5 MHz
• RXW-WCF-921: 916–924 MHz
• RXW-WCF-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: 470 x 191 x 121 mm (18.5 x 7.5 x 4.75 in.)
• Cable length: 3 m (9.8 ft)
• Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
• Weight: Sensor and cable: 1.332 kg (2 lb, 15 oz)
  Mote: 223 g (7.87 oz)
• Materials:
• Sensor: Polycarbonate wind cups, sealed stainless steel bearing, UV-resistant ABS wind vane and black-anodized aluminum anemometer arm
• Mote: PCPBT, silicone rubber seal
• Environmental Rating:
• Sensor: Weatherproof
• Mote: IP67, NEMA 6

• Measurement Range: 0 (dry) to 100% (wet)
• Sensor Type: Capacitive grid
• Interchangeability Between Sensors (Over the Range 10-90% Wet): ±10%
• Repeatability: ±5%; see Note 1
• Resolution: 0.59%
• Stability (Drift): 3 years in typical growth conditions

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-LWA-900: 904-924 MHz
• RXW-LWA-868: 866.5 MHz
• RXW-LWA-922: 916–924 MHz
• RXW-LWA-921: 921 MHz 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: 2
• 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 grid: 4.7 x 5.1 cm (1.8 in x 2.0 inches)
• Sensor housing: 12.2 x 1.8 cm (4.8 in x 0.7 inches)
• Mounting bracket: 20 x 3 x 0.5 cm (8 x 1.3 x 0.2 inches)
• Cable length: 2 m (6.56 ft)
• Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
• Weight: Sensor and cable: 127 g (4.5 oz); with bracket: 290 g (10.2 oz)
  Mote: 223 g (7.87 oz)
• Materials:
• Sensor: PVC housing, epoxy potting compound, nylon grommet, FR-4 circuit board, PVC cable jacket
• Bracket: PVC mounting bracket, UV-stable nylon cable ties, zinc dichromate plated steel U-bolts
• Mote: PCPBT, silicone rubber seal
• Environmental Rating:
• Sensor and cable: Weatherproof
• Mote: IP67, NEMA 6