Contents

Revision and Copyright Information
Limited Warranty
Assistance
Safety
Table of Contents
1. Introduction
2. Precautions
3. Initial Inspection
4. QuickStart
5. Overview
- 5.1 Measurement
- 5.2 Leaf Mimicry
6. Specifications
7. Installation
- 7.1 Field Installation
- 7.2 Wiring
- 7.3 Programming
  - 7.3.1 Voltage Measurement
  - 7.3.2 Minutes Dry, Minutes Wet or Contaminated, and Minutes Wet
  - 7.3.3 Interpreting Data
8. Maintenance
9. Acknowledgement
Appendix A. Importing Short Cut Code Into CRBasic Editor
Appendix B. Example Programs
- B.1 Example CR1000X Program
- B.2 Example CR6 Program
Campbell Scientific Companies

Campbell Scientific LWS Product Manual

Campbell Scientific LWS Sensor manual cover

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Campbell Scientific LWS Sensor Specification

The Campbell Scientific LWS Sensor is a specialized tool designed for precise leaf wetness measurement, essential in agricultural and environmental research. This sensor utilizes a capacitive sensing technique, allowing it to accurately determine the presence and duration of moisture on leaf surfaces without direct contact. The LWS sensor features a robust design that mimics the thermal mass and radiative properties of natural leaves. Constructed to withstand various environmental conditions, it is encased in a durable enclosure that protects its internal components from physical damage and corrosion. The sensor operates over a wide temperature range, ensuring reliable performance in diverse climates. It requires a nominal input voltage of 2.5 to 5 VDC and outputs a voltage signal that corresponds to the wetness state of the leaf surface, facilitating easy integration with data loggers and monitoring systems. With a measurement range that can detect both the onset and cessation of wet conditions, the LWS sensor provides critical data for applications such as disease prediction models, irrigation scheduling, and ecosystem monitoring. Its lightweight and compact design simplify installation and maintenance, while its low power consumption makes it ideal for remote or solar-powered setups. The Campbell Scientific LWS Sensor is compatible with a variety of mounting options, enhancing its versatility in field deployments. Its high sensitivity and rapid response time make it a reliable choice for researchers and professionals seeking detailed and accurate leaf wetness data.

Campbell Scientific LWS Sensor F.A.Q.

How do I install the Campbell Scientific LWS Sensor?

To install the Campbell Scientific LWS Sensor, mount it securely on a stable structure using the provided brackets. Ensure that the sensor is positioned horizontally and that the cable is routed safely to prevent damage. Connect the sensor to a compatible data logger following the wiring diagram provided in the user manual.

What is the best way to calibrate the LWS Sensor?

The LWS Sensor is typically factory calibrated and does not require frequent recalibration. However, for field calibration, ensure the sensor is clean and dry, then follow the calibration procedure outlined in the manual using a known reference.

How can I troubleshoot data discrepancies from the LWS Sensor?

Check the sensor's physical condition for dirt or damage. Verify connections and wiring are secure. Review the data logger's configuration for correct settings. If the issue persists, consult the troubleshooting section of the manual or contact technical support.

What maintenance is required for the LWS Sensor?

Regularly clean the sensor surface with a soft, damp cloth to remove dirt and debris. Inspect the wiring and connections for signs of wear or corrosion. Periodically check that the mounting is secure and that the sensor is level.

Can the LWS Sensor be used in harsh weather conditions?

Yes, the LWS Sensor is designed to operate in a wide range of environmental conditions, including rain, snow, and dust. However, extreme conditions may affect its performance, so ensure it is properly maintained and monitored.

How do I integrate the LWS Sensor with a data logger?

Connect the sensor to the data logger using the appropriate ports and follow the wiring diagram. Configure the data logger to read the sensor's output according to the specifications outlined in the manual. Use compatible software to log and analyze the data.

What is the typical lifespan of the LWS Sensor?

The LWS Sensor is built for durability and can last several years with proper maintenance. Regular inspections and cleaning will help ensure its longevity and reliable performance.

How can I ensure accurate readings from the LWS Sensor?

Ensure the sensor is clean and free from obstructions that could affect its readings. Confirm that it is mounted correctly and level. Regularly verify the data against known reference values to check for accuracy.

What should I do if the LWS Sensor stops working?

First, check the power supply and connections. Inspect the sensor for physical damage or obstructions. If the problem persists, consult the troubleshooting guide in the manual or contact Campbell Scientific support for further assistance.

Are there any specific environmental considerations for using the LWS Sensor?

The LWS Sensor should be installed in a location that avoids excessive shadowing or obstruction from nearby objects. Ensure that it is not exposed to chemicals or corrosive substances that could damage the sensor components.