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RXW-T11-xxx HOBOnet T11 Soil Moisture/Temp Sensor
  • RXW-T11-xxx HOBOnet T11 Soil Moisture/Temp Sensor
  • RXW-T11-xxx HOBOnet T11 Soil Moisture/Temp Sensor
  • RXW-T11-xxx HOBOnet T11 Soil Moisture/Temp Sensor

RXW-T11- 868 HOBOnet T11 Soil Moisture/Temp Sensor

RXW-T11- 868

RXW-T11-xxx HOBOnet T11 Soil Moisture/Temp Sensor

A durable wireless sensor that works with the HOBOnet system to measure soil moisture (volumetric water content) and soil temperature; lasts up to 10 years in the field.

Important Information

A complete system requires at least one HOBO RX3000 Remote Monitoring Station, a HOBOnet Wireless Manager, and a HOBOnet Wireless Sensor, OR one HOBO MicroRX station (which has an integrated HOBOnet Wireless Manager) and a HOBOnet Wireless Sensor. HOBOnet Wireless Repeaters (RXW-RPTR-xxx or RXW-RPTR-B-xxx) can be added to extend the range.

€639.00
VAT excluded
Quantity

Description

Overview

A wireless sensor that works with the HOBOnet system to not only measure soil moisture (volumetric water content) with better accuracy and precision, but also provide soil temperature measurements. Designed to withstand harsh environmental conditions, this durable sensor last up to 10 years, so you can leave them in the field for extended periods of time. Sharpened stainless-steel probes make installation easy, even in hard soil, and an increased volume of influence provides better results and a more accurate view of soil moisture. The HOBOnet T11 is backed by over 20 years of soil-moisture research and features a trademark 70MHz frequency capacitance technology, minimizing salinity and textural effects.

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 and are potentially vulnerable to nearby lightning strikes. Sensors are easily linked to the network, and data can be accessed through HOBOlink®, Onset's innovative cloud software platform.

We suggest using the Verification Clip (see Compatible Items, below). The Verification Clip provides a convenient way to confirm the operation and soil moisture accuracy of HOBOnet T11 and T12 sensors. Attaching this clip to a sensor provides a known soil moisture level for verifying measurement accuracy, without having to test the sensor in actual soils, which normally requires weighing soil samples and drying them in an oven.

Features

Sensor Features

  • Soil moisture (volumetric water content) and soil temperature measurements with one device
  • Sensor lasts up to 10 years in the field
  • Largest volume of influence (1010 mL) relative to sensor size, resulting in more accurate soil moisture measurements
  • Easy installation with sharpened stainless-steel probes that are more resistant to damage/deterioration
  • Less sensor-to-sensor variability

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

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
    ±1.0°C (1.8°F) from -40 to 0°C (-40 to 32°F)
    ±0.5°C (0.9°F) from 0 to 60°C (32 to 140°F)
Resolution
    0.1°C
    0.18°F

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-T11-900: 904-924 MHz
    RXW-T11-868: 866.5 MHz
    RXW-T11-921: 921 MHz
    RXW-T11-922: 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 (-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 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-T11-xxx sensor and cable: 245 g (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

Notices

    * The sensor data can be post-calibrated if necessary (e.g. the sensor is used in non-mineral soil types or higher than standard accuracy is required). Users can apply a calibration equation to the data exported from HOBOlink. The VWC range will depend on the calibration equation.
    ** Temperature measurement, for applicable sensors, may not be accurate if sensor is not fully immersed in medium of interest, due to longer equilibration time.

Product Details
RXW-T11- 868
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