Gemho RS485 Leaf Wetness Sensor – Analog Leaf Temperature & Humidity Sensor IP68 for Greenhouse & Soil Monitoring

The RS485 Leaf Wetness Sensor is designed for monitoring leaf wetness and moisture-related environmental conditions in greenhouses, farms, agricultural fields, and other monitoring systems.

The sensor uses a resistance-based sensing principle and provides a specified measurement range of 0–100%RH. Depending on the purchased version, it can provide RS485 or analog outputs such as 4–20mA, 0–5V, and 0–10V. Some versions may also support remote communication through 4G, NB-IoT, or LoRa.

Its IP68-rated construction provides protection against dust and water exposure, making it suitable for demanding field environments. The compact polymer body can be installed as part of an automated greenhouse or agricultural monitoring system.

Features

• Leaf wetness monitoring sensor
• Resistance-based sensing principle
• Measuring range: 0–100%RH
• RS485 digital output option
• 4–20mA analog output option
• 0–5V and 0–10V output options
• 4G, NB-IoT, and LoRa versions available
• IP68 waterproof construction
• 9–18V DC operating supply
• Durable polymer construction
• Compact 45 × 15 × 123mm design
• Suitable for greenhouse and agricultural monitoring

Applications

• Greenhouse environmental monitoring
• Leaf wetness monitoring
• Precision agriculture
• Crop and plant monitoring
• Agricultural automation
• Soil and moisture monitoring systems
• Industrial environmental monitoring
• Irrigation management systems
• Remote agricultural data collection
• IoT-based farming projects

How to Use

1. Select the appropriate output version for your monitoring or control system.
2. Provide a suitable 9–18V DC power supply with correct polarity.
3. Install the sensing portion in the required leaf or environmental monitoring position.
4. Connect the selected RS485 or analog output to the compatible controller, PLC, data logger, or monitoring device.
5. Configure the receiving system according to the sensor's output type and communication parameters.
6. Keep the sensor surface clean and properly positioned for consistent measurements.

Important Notes

• Verify the exact output interface before ordering, as RS485, 4–20mA, 0–5V, 0–10V, 4G, NB-IoT, and LoRa may be version-dependent.
• Supply voltage should remain within the specified 9–18V DC range.
• IP68 protection does not mean the sensor can be used outside its specified operating conditions.
• Correct installation and calibration are important for reliable monitoring.
• The stated 0–100%RH range describes the supplied specification; actual leaf-wetness interpretation depends on installation and sensor configuration.
• Keep connectors and cable joints properly protected from water ingress.
• Do not connect an analog-output version directly to an RS485 interface.
• Product dimensions may have minor measurement variation.

Package Includes

• 1 × Leaf Wetness Sensor