Advertisement
HOBOnet® Wireless Sensor Network
RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual
RXW Soil Moisture EC
Temp Sensor
Models:
• RXW-T12-900 (US)
• RXW-T12-868 (Europe)
• RXW-T12-921 (Taiwan)
• RXW-T12-922
(Australia/NZ)
Included Items:
• Cable ties
• Screws
24747-A
This sensor measures soil moisture, temperature, and electrical conductivity (EC) in numerous
soil types, including high salinity and sandy soil. It is designed to work with the HOBOnet (HOBO
RX) Wireless Sensor Network in which data is transmitted wirelessly from the sensor mote
across the network to the station and then uploaded to HOBOlink® web-based software. With
HOBOlink, you can monitor sensor readings, view graphs, set up alarms, download data, and
more.
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 Measurment
70 MHz
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
Sensor: -40 to 60°C (-40 to 140°F)
Range
Mote: -25° to 60°C (-13° to 140°F) with rechargeable 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
RXW-T12-900: 904–924 MHz
Frequencies
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
50 motes per one HOBOnet Wireless Sensor Network
Motes
Battery Type/
Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar
Power Source
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
-40 to 70°C (-40 to 158°F) with lithium batteries
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Hobo RXW TEROS-12
Summary of Contents for Hobo RXW TEROS-12
- Page 1 This sensor measures soil moisture, temperature, and electrical conductivity (EC) in numerous soil types, including high salinity and sandy soil. It is designed to work with the HOBOnet (HOBO RX) Wireless Sensor Network in which data is transmitted wirelessly from the sensor mote across the network to the station and then uploaded to HOBOlink®...
- Page 2 RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual Specifications (continued) Sensor: 7.47 x 9.4 x 2.39 cm (2.94 x 3.7 x 0.94 inches) Dimensions 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)
- Page 3 RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual shows all symbols illuminated on the LCD screen followed by mitigates any potential noise from the system on the definitions of each symbol in the table. measured sensor data. Important: Do not attach anything to the section of the cable between the sensor head and the ferrite core as this may influence the measurements.
-
Page 4: Installing The Sensor
RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual 3. Press the Search button (the magnifying glass). The 7. Press the Search button (the magnifying glass) on the magnifying glass icon will blink while the station is in search station to stop searching for motes. - Page 5 RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual sensor and push it into to the side of the undisturbed soil. Look • Do not touch the sensor needles with an ungloved hand or down the hole and make sure it is firmly seated. You can also...
-
Page 6: Maintenance
RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual 5. In HOBOlink, go to Devices, then RX Devices, and click your • Place the mote so there is full line of sight with the next mote. If there is an obstruction between two sensor station name. - Page 7 RXW TEROS-12 Soil Moisture EC Temp Sensor (RXW-T12-xxx) Manual 3. Make sure the solar panel cable is plugged in. WARNING: Do not cut open, incinerate, heat above 85°C (185°F), or recharge the lithium batteries. The batteries may explode if the mote is exposed to extreme heat or conditions Make sure that could damage or destroy the battery cases.
- Page 8 ISM radio wave radiated devices. © 2020 Onset Computer Corporation. All rights reserved. Onset, HOBO, and HOBOlink are registered trademarks of Onset Computer Corporation. Some material reprinted with permission of METER Group, Inc.
Need help?
Do you have a question about the RXW TEROS-12 and is the answer not in the manual?
Questions and answers