与我们大多数的数据采集器相兼容
概览
LWS 叶片湿度传感器能探测在传感器表面上的小量的水或冰。设计用于部署在冠层里，或气象站的主桅杆上。我们所有的数据采集器都能测量LWS的输出信号。
优势与特点
- Imitates characteristics of a leaf
- Does not require painting or calibration of individual sensors
- Detects trace amounts of water or ice on the leaf surface
图像
技术说明
LWS 测量传感器上表面的介电常数。这种方法允许传感器检测传感器表面上任何位置的水或冰的存在。
产品规格
| Measurement Description | Dry, frosted, wet |
| Signal Type/Output | Analog voltage |
| Measurement Time | 10 ms |
| Power | 2.5 Vdc @ 2 mA to 5 Vdc @ 7 mA |
| Output | 250 to 1500 mV (millivolt reading relates to moisture state) |
| Operating Temperature Range | -40° to +60°C |
| Life Expectancy | 2+ years (continuous use) |
| Painting | Does not require painting. |
| Dimensions | 12.0 x 5.8 x 0.8 cm (4.7 x 2.3 x 0.3 in.) |
| Weight | 0.14 kg (5 oz) with 4.57 m (15 ft) cable |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| CR1000X (retired) | ||
| CR300 (retired) | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR350 | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) |
Additional Compatibility Information
Installation
The LWS is designed to be deployed either in the canopy or on a weather station mast. Two holes in the non-sensing portion of the sensor body are provided for attaching the sensor to a pole or branch via twist ties or with 4-40 bolts.
常见问题解答
LWS-L: 4
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- The ability of the LWS to detect water on its surface is not limited by the size of the water droplets, as it can be with a 237.
- The LWS is ready to install for most applications, whereas the 237 requires further preparation before installation.
- The LWS can detect the presence of ice and differentiate ice from water. In contrast, when ice forms on the 237, the sensor’s output is no different from that of a dry sensor.
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Both leaf wetness sensors are compatible with all Campbell Scientific data loggers. However, the 237 is often used in large legacy networks that rely on the 237 for data continuity. The 237 does require painting and field calibration, whereas the LWS does not.
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