RXW EC-5 and 10H Soil Moisture Sensor (RXW-SMx-xxx) Manual
1-800-LOGGERS 2
www.onsetcomp.com
Specifications (continued)
Memory
16 MB
Dimensions
RXW-SMC-xxx soil probe: 89 x 15 x 1.5 mm (3.5 x 0.62 x 0.06 in.)
RXW-SMD-xxx soil probe: 160 x 32 x 2 mm (6.5 x 1.25 x 0.08 in.)
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-SMC-xxx sensor and cable: 180 grams (6.3 oz)
RXW-SMD-xxx sensor and cable: 190 grams (6.7 oz)
Mote: 223 g (7.87 oz)
Materials
Sensor: Weatherproof
Mote: PCPBT, silicone rubber seal
Environmental Rating
Mote: IP67, NEMA 6
Compliance Marks
RXW-SMC-900 and RXW-SMD-900: See last page
RXW-SMC-868 and RXW-SMD-868: The CE Marking identifies
this product as complying with all relevant directives in the
European Union (EU).
RXW-SMC-922 and RXW-SMD-922: See last page
Note 1: (RXW-SMC-xxx and RXW-SMD-xxx) The sensor is capable of providing readings outside the standard volumetric
water content range. This is helpful in diagnosing sensor operation and installation. See the
Sensor
Operation
section for more details.
Note 2: (RXW-SMC-xxx) This is a system level accuracy specification and is comprised of the probe’s accuracy of ±0.03
m³/m³ typical (±0.02 m³/m³ soil specific) plus the mote accuracy of ±0.001 m³/m³ at 25°C (77°F). There are
additional temperature accuracy deviations of ±0.003 m³/m³ / °C maximum for the probe across operating
temperature environment, typical <0.001 m³/m³ / °C. (The temperature dependence of the mote is negligible.)
Note 3: (RXW-SMC-xxx) Given the nature of the sensor design and sensor operating frequency, the system has inherent
susceptibilities to Radio Frequency signals. The accuracy specification when subjected to certain RFI
environments, such as those outlined in IEC 61000-4-3 and IEC 61000-4-6, is reduced to 0.061 m³/m³.
The system level accuracy will be particularly affected when placed in an electric field of 3 V/m or greater in the
70 MHz range. RFI mitigation practices and physical deployment changes may reduce the systems susceptibility.
Note 4: (RXW-SMD-xxx) This is a system level accuracy specification and is comprised of the probe’s accuracy of ±0.03
m³/m³ typical (±0.02 m³/m³ soil specific) plus the mote accuracy of ±0.003 m³/m³ at 25°C (77°F). There are
additional temperature accuracy deviations of ±0.003 m³/m³ / °C maximum for the probe across operating
temperature environment, typical <0.001 m³/m³ / °C. (The temperature dependence of the mote is negligible.)
Note 5: (RXW-SMD-xxx): Given the nature of the sensor design and sensor operating frequency, the system has inherent
susceptibilities to Radio Frequency signals. The accuracy specification when subjected to certain RFI
environments, such as those outlined in IEC 61000-4-3 and IEC 61000-4-6, may be significantly reduced.
The system level accuracy will be particularly affected when placed in an electric field of 3 V/m or greater in the
150 KHz to 1000 MHz range. RFI mitigation practices and physical deployment changes may reduce the systems
susceptibility, however will yield reduced system accuracy. If deployments are planned in high RFI energy
environments, Onset recommends on-site testing to determine system level accuracy.
Mote Components and Operation
Sensor Mote Closed, Front
Sensor Mote Closed, Back
Sensor Mote Opened
Mounting Tab:
Use the tabs at the top and bottom of the mote
to mount it (see
Deploying and Mounting
).
Solar Panel:
Position the solar panel towards the sun to charge
the mote batteries (see
Deploying and Mounting
).
Mounting
Tab
Solar Panel
Solar Panel Cable
Button
USB Port
Battery Holder
LCD Screen
Latch
Eyelet
Ground Wire
Port
Sensor Cable
Antenna
LEDs
