HOBOnet土壤湿度EC-5传感器

	RXW-SMC-xxx	RXW-SMD-xxx
测量范围	土壤中：0 至 0.550 m³/m³（体积含水量）	土壤中：0 至 0.570 m³/m³（体积含水量）
扩展范围	-0.401 至 2.574 m³/m³；参见注1	-0.659 至 0.6026 m³/m³；参见注1
准确度	±0.031 m³/m³（±3.1%）典型值，适用于 0 至 50°C（32° 至 122°F）下电导率不超过 8 dS/m 的矿质土壤；经土壤特定校准后为 ±0.020 m³/m³（±2%）；参见注2和注3	±0.033 m³/m³（±3.3%）典型值，适用于 0 至 50°C（32° 至 122°F）下电导率不超过 10 dS/m 的矿质土壤；经土壤特定校准后为 ±0.020 m³/m³（±2%）；参见注4和注5
分辨率	0.0007 m³/m³（0.07%）	0.0008 m³/m³（0.08%）
影响体积	0.3 升（10.14 盎司）	1 升（33.81 盎司）
传感器频率	70 MHz	70 MHz
METER ECH2O 探头部件号	EC-5	10HS
传感器工作温度范围	0° 至 50°C（32° 至 122°F）。尽管传感器探头和电缆可在冰点以下温度（低至 -40°C/F）安全工作，但在此类极端温度下收集的土壤水分数据超出传感器的准确测量范围。	0° 至 50°C（32° 至 122°F）。尽管传感器探头和电缆可在冰点以下温度（低至 -40°C/F）安全工作，但在此类极端温度下收集的土壤水分数据超出传感器的准确测量范围。超过 50°C（122°F）的持续高温会缩短节点电池寿命。

无线传感节点

工作温度范围

-25° to 60°C (-13° to 140°F) with rechargeable batteries

-40° to 70°C (-40° to 158°F) with lithium batteries

无线电功率

12.6 mW (+11 dBm) non-adjustable

传输范围

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

无线数据标准

IEEE 802.15.4

无线电工作频率

RXW-SMC-900 and RXW-SMD-900: 904-924 MHz

RXW-SMC-868 and RXW-SMD-868: 866.5 MHz

RXW-SMC-921 and RXW-SMD-921: 921 MHz

RXW-SMC-922 and RXW-SMD-922: 916-924 MHz

采用的调制

偏移四相相移键控

偏移正交相移键控

数据速率

Up to 250 kbps, non-adjustable

占空比

<1%

最大微粒数量

Up to 50 wireless sensors or 336 data channels per one HOBO RX station

日志记录速率

1 minute to 18 hours

数据通道数量

2

电池类型/电源

Two AA 1.2V rechargeable NiMH batteries, powered by built-in solar panel or two AA 1.5 V lithium batteries for operating conditions of -40° to 70°C (-40° to 158°F)

电池续航时间

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

记忆

16 MB

维度

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)

重量

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)

材料

Sensor: Weatherproof

Mote: PCPBT, silicone rubber seal

环境评级

Mote: IP67, NEMA 6

通知

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