Hobo RXW 10HS Manual

HOBO® RX Wireless Sensor Network
RXW EC-5 or 10H Soil Moisture Sensor (RXW-SMx-xxx) Manual
RXW 10HS model shown
RXW EC-5 or 10H Soil
Moisture Sensor
Models:
• RXW-SMC-900 and
RXW-SMD-900 (US)
• RXW-SMC-868 and
RXW-SMD-868 (Europe)
• RXW-SMC-922 and
RXW-SMD-922
(Australia/NZ)
Included Items:
• Protective cap
• Cable ties
• Screws
22241-A
This sensor measures soil moisture and is designed to work with the HOBOnet Wireless Sensor
Network in which data is transmitted wirelessly from the sensor mote across the network to
the RX3000 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

RXW-SMC-xxx
Measurement Range In soil: 0 to 0.550 m³/m³ (volumetric
water content)
Extended Range -0.401 to 2.574 m³/m³; see Note 1
Accuracy ±0.031 m³/m³ (±3.1%) typical 0 to
50°C (32° to 122°F) for mineral
soils up to 8 dS/m and ±0.020
m³/m³ (±2%) with soil specific
calibration; see Notes 2 and 3
Resolution 0.0007 m³/m³ (0.07%)
Volume of Influence 0.3 liters (10.14 oz)
Sensor Frequency 70 MHz
METER ECH O Probe Part EC-5
2
No.
Sensor Operating 0° to 50°C (32° to 122°F). Although
the sensor probe and cable can
Temperature Range
safely operate at below-freezing
temperatures (to -40°C/F), the soil
moisture data collected at these
extreme temperatures is outside
of the sensor's accurate
measurement range.
Wireless Mote
Operating Temperature -25° to 60°C (-13° to 140°F) with rechargeable batteries
Range -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 RXW-SMC-900 and RXW-SMD-900: 904–924 MHz
Frequencies RXW-SMC-868 and RXW-SMD-868: 866.5 MHz
RXW-SMC-922 and RXW-SMD-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 RX 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
RXW-SMD-xxx
In soil: 0 to 0.570 m³/m³ (volumetric
water content)
-0.659 to 0.6026 m³/m³; see Note 1
±0.033 m³/m³ (±3.3%) typical 0 to
50°C (32° to 122°F) for mineral soils
up to 10 dS/m and ±0.020 m³/m³
(±2%) with soil specific calibration;
see Notes 4 and 5
0.0008 m³/m³ (0.08%)
1 liter (33.81 oz)
70 MHz
10HS
0° to 50°C (32° to 122°F). Although
the sensor probe and cable can
safely operate at below-freezing
temperatures (to -40°C/F), the soil
moisture data collected at these
extreme temperatures is outside of
the sensor's accurate
measurement range. Extended
temperatures above 50°C (122°F)
will decrease mote battery life.