Skip to the beginning of the images gallery

HOBOnet T12 Soil Moisture/Temp/EC Sensor

A durable wireless sensor that works with the HOBOnet system to measure soil moisture, temperature, and electrical conductivity; 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.

CHF 686.00

SKU

RXW-T12-868

Buy 10 for CHF 665.45 each and save 3%
Buy 25 for CHF 651.70 each and save 5%
Buy 50 for CHF 631.15 each and save 8%
Buy 100 for CHF 603.70 each and save 12%

Details

Technische Daten

Datenblatt

Kompatible Artikel

Overview

A wireless sensor that works with the HOBOnet system to not only provide advanced soil moisture measurements (volumetric water content) with better accuracy and precision, but also measure soil temperature and electrical conductivity. 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 probe tips make installation easy, even in hard soil, and an increased volume of influence provides more accurate results. The HOBOnet T12 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 recommend 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), soil temperature, and electrical conductivity 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

What's in the box

HOBOnet T12 Soil Moisture/Temp/EC Sensor
Cable ties
Screws

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: ±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 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.