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HOBOnet Multi-Depth Soil Moisture Sensor

The HOBOnet Multi-Depth Soil Moisture Sensor is a wireless sensor that works with the HOBOnet system to measure soil moisture and soil temperature at multiple depths with a single probe, for fast and ..

  • Brands ONSET
  • Product Code: RXW-GPx-868
  • Availability: 7-10 Days

Available Options

Tags: soil moisture, sensor, soil temperature, HOBOnet

HOBOnet Soil Moisture Sensor able to measure at Multiple Depths

The HOBOnet Multi-Depth Soil Moisture Sensor is a wireless sensor that works with the HOBOnet system to measure soil moisture and soil temperature at multiple depths with a single probe, for fast and easy installation. This durable sensor is available in three probe lengths for measurements namely the 45 cm (18 in) three-segment probe, the 60 cm (24 in) four-segment probe to the 90 cm (35 in) six-segment probe. The HOBOnet system is a cost-effective and scalable wireless sensor network for web-enabled monitoring of field conditions for applications such as crop management, research, and greenhouse operations. And because it’s wireless, you can deploy a network of sensors to easily monitor multiple points with a single system, while avoiding the risk of long cables that can interfere with field operations. Sensors are easily linked to the network, and data can be accessed through HOBOlink®, Onset's innovative cloud-based software platform.

 

Highlighted Features

Sensor Features

  • Available in three probe lengths: 45 cm (18 in), 60 cm (24 in), and 90 cm (35 in)
  • Soil moisture measurements over entire probe segment lengths
  • Soil temperature measurements at multiple points
  • The largest volume of influence per measurement (2 L volume of influence per 15 cm segment)
  • Advanced filtering of 400,000 pulses per measurement eliminates outlying readings and provides precise, repeatable soil moisture data
  • Polycarbonate housing and epoxy-sealed circuit board protect vital components during installation and throughout the deployment
  • Easy installation with minimal soil disturbance and no digging required when using the optional pilot rod and slide hammer

 

Wireless Features

  • 900 MHz wireless mesh self-healing technology
  • 450 to 600 meter (1,500 to 2,000 feet) wireless range and up to five hops
  • Up to 50 wireless sensors or 336 data channels per HOBO RX station
  • Simple button-push to join the HOBOnet wireless network
  • Onboard memory to ensure no data loss
  • Powered by rechargeable AA batteries and built-in solar panel

 

In what environment does this operate?

This operates in an outdoor environment.

What measurements does this support?

The supports the following measurements: Soil Moisture and Soil Temperature

 

Sensor
Environmental Rating Mote: IP67, NEMA 6
Number of Data Channels RXW-GP3-xxx: 10 RXW-GP4-xxx: 12 RXW-GP6-xxx: 18
Sensor Accuracy Soil Moisture: Volumetric Water Content (VWC): ±0.02 m³/m³ (±2%) in most soils typical from 0° to 50°C (32° to 122°F) Temperature: ±0.5°C (0.9°F)
Sensor Dimensions RXW-GP3-xxx sensor length: 53.2 cm (20.9 inches) RXW-GP4-xxx sensor length: 68.2 cm (26.9 inches) RXW-GP6-xxx sensor length: 98.2 cm (38.7 inches) Sensor diameter: 3 cm (1.2 inches) 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)
Sensor Measurement Range Soil Moisture: Volumetric Water Content (VWC): 0.000 to 1.000 m³/m³ in most soils Temperature: -20° to 70°C (-4° to 158°F)
Sensor Memory Capacity 16MB
Sensor Resolution Soil Moisture: Volumetric Water Content (VWC): 0.001 m³/m³ Temperature: 0.1°C (0.18°F)
Sensor Weight RXW-GP3-xxx sensor: 351 g (12.4 oz) RXW-GP4-xxx sensor: 408 g (14.4 oz) RXW-GP6-xxx sensor: 526 g (18.6 oz) Cable: 190 g (6.7 oz) Mote: 223 g (7.87 oz)
Wireless Mote
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 Mounting and Positioning the Mote), operation outside this range will reduce the battery service life With non-rechargeable lithium batteries: RXW-GP3-xxx: 1 year with a 10-minute logging interval RXW-GP4-xxx: 1 year with a 15-minute logging interval RXW-GP6-xxx: 7 months with a 15-minute logging interval
Data Rate Up to 250 kbps, non-adjustable
Duty Cycle <1%
Logging Rate Maximum logging interval: 18 hours RXW-GP3-xxx: 5 minutes year round using solar power with rechargeable batteries; 10 minutes using non-rechargeable Lithium batteries RXW-GP4-xxx: 5 minutes summer, 10 minutes winter using solar power with rechargeable batteries; 15 minutes using non-rechargeable Lithium batteries RXW-GP6-xxx: 5 minutes summer, 10 minutes winter using solar power with rechargeable batteries; 15 minutes using non-rechargeable Lithium batteries
Maximum Number of Motes Up to 50 wireless sensors or 336 data channels per one HOBO RX station
Modulation Employed OQPSK (Offset Quadrature Phase Shift Keying)
Power Source Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar panel or two AA 1.5 V non-rechargeable lithium batteries for operating conditions of -40 to 70°C (-40 to 158°F)
Radio Operating Frequencies 866.5 MHz
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
Wireless Mote Operating Temperature Range Sensor: -20° to 70°C (-4° to 158°F) Mote: -25° to 60°C (-13° to 140°F) with rechargeable batteries -40° to 70°C (-40° to 158°F) with lithium batteries