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Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, MA 01801 - TestEquipmentDepot.com
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-C
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
In soil: 0 to 0.550 m³/m³ (volumetric water content)
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
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Related Manuals for Test Equipment Depot RXW-GP Series
Summary of Contents for Test Equipment Depot RXW-GP Series
- Page 1 Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, MA 01801 - TestEquipmentDepot.com HOBOnet® Wireless Sensor Network RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual 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 3 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual Eyelet: Use this eyelet to attach a 3/16 inch padlock to the LCD Symbol Description mote for security. This indicates a problem with the sensor itself (the mote is operational). Check the sensor and make any Latch: Use the two latches to open and close the mote door.
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Page 6: Installing The Sensor
RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual Sensor Installation Guidelines Minimum Logging Minimum Logging Interval Using Solar Interval Using Before installing the sensor, follow these guidelines. Part Power with Non-Rechargeable • Install the probe when the soil is dry to minimize the air Number Rechargeable Batteries* Lithium Batteries... - Page 7 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual the depth the rod should be driven into the soil (which should line up with the top of the sensor). 3. Screw the pilot rod into the slide hammer as shown. Use two adjustable wrenches to make sure the threads are tight.
- Page 8 RXW Multi-Depth Soil Moisture Sensor (RXW-GPx-xxx) Manual • Consider using a 3/16 inch padlock to restrict access to the there is good soil contact on all sensor surfaces. The accuracy depends on not having any air gaps around the mote. With the mote door closed, hook a padlock through sensor.
- Page 11 ISM radio wave radiated devices. Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, MA 01801 - TestEquipmentDepot.com © 2020–2021 Onset Computer Corporation. All rights reserved. Onset, HOBO, HOBOnet, and HOBOlink are registered trademarks of Onset Computer Corporation.
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