The LWS, manufactured by Decagon Devices, is a leaf-wetness sensor that can detect small amounts of water or ice on the sensor surface. It is designed to be deployed either in the canopy or on a weather station mast. All of our dataloggers can measure its output signal.Read More
The "-L" on a product model indicates that the cable length is specified at the time of order.
The LWS measures the dielectric constant of the sensor’s upper surface. This method allows the sensor to detect the presence of water or ice anywhere on the sensor’s surface.
|Measurement Time||10 ms|
|Power||2.5 Vdc @ 2 mA to 5 Vdc @ 7 mA|
|Output||250 to 1500 mV|
|Operating Temperature Range||-20° to +60°C|
|Life Expectancy||2+ years (continuous use)|
|Dimensions||11.2 x 5.8 x 0.075 cm (4.4 x 2.3 x 0.0295 in.)|
|Weight||0.14 kg (5 oz) with 4.57-m (15-ft) cable|
|CR200(X) Series||CR800/CR850||CR1000||CR3000||CR6 Series||CR9000X||CR300 Series|
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.
Number of FAQs related to LWS-L: 8
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Both leaf wetness sensors are compatible with all Campbell Scientific dataloggers. However, the 237-L is often used in large legacy networks that rely on the 237-L for data continuity. The 237-L does require painting and field calibration, whereas the LWS-L does not.
Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places in the Ordering information area of the sensor product page:
If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.
All of the other cable termination options, if available, are listed on the Ordering information area of the sensor product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown in the Ordering information area of the 034B-L product page.
Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model.
Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact Campbell Scientific for assistance.
To incorporate a sensor that is compatible with wireless sensor interfaces into a wireless network, a CWS900-series wireless sensor interface is needed, as well as an A205 CWS-to-PC interface to configure it.