Advertisement
Quick Links
HOBOnet® Wireless Sensor Network
RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual
RXW Multi-Depth Soil
Moisture Sensor
Models:
• RXW-GP3-900 (US)
RXW-GP3-868 (Europe)
RXW-GP3-921 (Taiwan)
RXW-GP3-922 (Australia/NZ)
• RXW-GP4-900 (US)
RXW-GP4-868 (Europe)
RXW-GP4-921 (Taiwan)
RXW-GP4-922(Australia/NZ)
• RXW-GP6-900 (US)
RXW-GP6-868 (Europe)
RXW-GP6-921 (Taiwan)
RXW-GP6-922 (Australia/NZ)
Included Items:
• Cable ties
• Screws
25115-A
This sensor measures soil moisture and temperature over multiple zones with a single probe
using GroPoint™ TDT technology. 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
0.000 to 1.000 m³/m³ in most soils
Accuracy
±0.02 m³/m³ (±2%) in most soils typical from 0° to 50°C (32° to 122°F)*
Resolution
0.001 m³/m³
Temperature
Measurement Range
-20° to 70°C (-4° to 158°F)
Accuracy
±0.5°C (0.9°F)
Resolution
0.1°C (0.18°F)
Depths Measured (see diagram on page 3)
RXW-GP3-xxx
45 cm (18 inches) total; three soil moisture zones, six temperature depths
RXW-GP4-xxx
60 cm (24 inches) total; four soil moisture zones, seven temperature depths
RXW-GP6-xxx
90 cm (35 inches) total; six soil moisture zones, eleven temperature depths
Wireless Mote
Operating Temperature
Sensor: -20° to 70°C (-4° to 158°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-GPx-900: 904–924 MHz
Frequencies
RXW-GPx-868: 866.5 MHz
RXW-GPx-921: 921 MHz
RXW-GPx-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
Up to 50 wireless sensors or 336 data channels per one HOBO RX station
Motes
Logging Rate
Maximum logging interval: 18 hours
Recommended minimum logging interval:
RXW-GP3-xxx:
RXW-GP4-xxx:
RXW-GP6-xxx:
See Battery Life specification for more details.
Number of Data Channels
RXW-GP3-xxx: 10
RXW-GP4-xxx: 12
RXW-GP6-xxx: 18
-40° to 70°C (-40° to 158°F) with lithium batteries
Using Solar Power with
Rechargeable Batteries
5 minutes year round
5 minutes summer,
10 minutes winter
5 minutes summer,
10 minutes winter
Using Non-Rechargeable
Lithium Batteries
10 minutes
15 minutes
15 minutes
Advertisement
Subscribe to Our Youtube Channel
Related Manuals for Hobo RXW Series
Summary of Contents for Hobo RXW Series
- Page 1 This sensor measures soil moisture and temperature over multiple zones with a single probe using GroPoint™ TDT technology. 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 Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual Specifications (continued) Battery Type/ Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar Power Source panel or two AA 1.5 V non-rechargeable 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°...
- Page 3 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual Sensor Components and Operation Latch: Use the two latches to open and close the mote door. Ground Wire Port: Use this port to connect a ground wire (see The sensor measures soil moisture and temperature over Mounting and Positioning the Mote).
- Page 4 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual In HOBOlink, measurement channels are listed as <sensor RXW-GP6 HOBOlink Channels serial number>-<number>, where <number> represents Corresponding Channel the soil moisture zones followed by the temperature RXW GP6 Sensor Channel Number in HOBOlink sensor depths in order from the top down to the tip of <serial number>-1 Soil moisture (water content)
- Page 5 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual 2. Press the Select button once (which shows the number of The green LED blinks quickly while the mote searches for a smart sensors installed) and then press it again to switch to network to join and then blinks slowly while it completes the network registration.
-
Page 6: Installing The Sensor
RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual station will automatically connect to HOBOlink and report the damage to the probe during insertion. A hole that is too mote as missing. Once the mote is back online, any logged data long may allow water to collect in the void below the will be uploaded the next time the station connects to probe and cause inaccurate readings. - Page 7 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual 4. At the location where you want to install the probe, use a entering the hole. The sensor should be completely covered repetitive up-then-down motion on the slide hammer to with soil and only the sensor cable visible. vertically drive the pilot rod into the soil.
-
Page 8: Maintenance
• The HOBOnet Wireless Sensor Network can support up to station log data for a few minutes. 50 wireless sensors or 336 data channels per one HOBO RX station. 4. Connect to HOBOlink again so that the station can upload the soil moisture data. -
Page 9: Battery Information
RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual recharge the batteries, the battery life is estimated at 3–4 • Make sure the interior seal is intact and free of any debris, and the latches are fully locked when the mote door is months. - Page 10 ISM radio wave radiated devices. © 2020 Onset Computer Corporation. All rights reserved. Onset, HOBO, HOBOnet, and HOBOlink are registered trademarks of Onset Computer Corporation. GroPoint is a trademark of RioT Technology Corp. Some material reprinted with permission of RioT Technology Corp Microsoft and Excel are registered trademarks of Microsoft, Corp.
Need help?
Do you have a question about the RXW Series and is the answer not in the manual?
Questions and answers