RY-CGH Photosynthetically Active Radiation Sensor

The RY-CGH photosynthetically active radiation sensor measures PAR within the 400–700 nm wavelength range using a photoelectric sensing principle. It is designed for continuous light monitoring and features a compact structure, convenient wiring, and an IP65-rated enclosure for outdoor use. With 4–20 mA or RS485 Modbus output options, it can be integrated into agricultural meteorological monitoring, greenhouse light management, plant growth research, and ecological monitoring systems.

Parameter	Specification
Output	RS485
Spectral Range	400-700nm
Response time	<1s (99%)
Temperature related	maximum 0.05% / ℃
Working temperature	-40℃~65℃

US$30.8–36.96/ Unit

Introduct

The RY-CGH photosynthetically active radiation sensor is designed for continuous light monitoring in agricultural and environmental applications. Its compact design, convenient wiring, and multiple output options support integration with compatible data acquisition systems. The IP65-rated enclosure makes it suitable for outdoor monitoring environments.

Structure of photosynthetically active radiation sensor

Optical Receiving Component: Receives incident light for measurement within the sensor’s specified spectral range.
Optical Filter (400–700 nm): Defines the spectral response range for measuring photosynthetically active radiation (PAR).
Silicon Photodetector: Converts incident light into an electrical signal proportional to light intensity.
Signal Processing and Output Circuitry: Processes the detected signal and provides the selected output, including 4–20 mA or RS485 Modbus.
Sensor Housing and Sealing Structure: Features an IP65-rated enclosure designed to protect against dust and water ingress during outdoor use.
Mounting and Interface Structure: Supports sensor installation and cable connection for integration with compatible data acquisition and environmental monitoring systems.

Details Show

The following images show the key details of the RY-CGH photosynthetically active radiation sensor, including its design, components, and connection interfaces. These details help illustrate the sensor’s construction and installation features.

Specifications

The RY-CGH photosynthetic radiation sensor measures PAR in the 400–700 nm wavelength range. It features high sensitivity, fast response, and stable signal output. Available output options support connection to compatible data acquisition systems for agricultural meteorology, greenhouse monitoring, and plant research.

Parameters

Mounting Type	accessories	Model Number	RY-CGH
Type	weather station	Brand Name	XINFENG
Usage	photosynthetically active radiation	Description	photosynthetically active radiation
Place of Origin	Hebei, China	Series	HCD
Features	HIGH SENSITIVITY	Output	RS485
Description	RY-CGH PAR Sensor	Spectral Range	400-700nm
Response time	<1s(99%)	Temperature related	maximum 0.05%/℃
Cosine correction	up to 80° incident angle	Internal resistance	<2K
Working temperature	-40℃~65℃	Working humidity	<90%
Output	original output 200mv	Farthest lead length	200m for current, 100m for RS485, 50m for voltage
Sensitivity	Sensitivity 7-50μv/pmol

Features

The RY-CGH photosynthetically active radiation sensor combines PAR measurement, rapid response, and flexible system connectivity for agricultural and environmental monitoring applications.

Accurate PAR Wavelength Coverage

Measures photosynthetically active radiation across the 400–700 nm wavelength range for greenhouse light monitoring, agricultural meteorology, and plant research.

Fast Response to Changing Light

A response time of less than 1 second (99%) supports continuous recording of light fluctuations under changing natural or artificial lighting conditions.

RS485 Digital Communication

The RS485 interface enables connection to compatible data loggers, weather stations, and environmental monitoring systems.

Dedicated Plant Light Monitoring

Designed for PAR monitoring in crop production, greenhouse management, and plant growth research, where light conditions need to be tracked over time.

Integration with Data Acquisition Systems

Supports integration into agricultural monitoring setups through a compatible communication interface and data acquisition configuration.

Flexible Installation Configuration

Cable length, mounting arrangement, and connection settings can be selected according to the monitoring site and system requirements.

Applications

The RY-CGH photosynthetically active radiation sensor provides light data for agricultural production, plant research, and environmental monitoring, helping users assess growing conditions and analyze changes in light availability.

agricultural meteorology

Monitor field light conditions and collect PAR data for crop growth assessment, agricultural weather analysis, and planting management.

Greenhouse cultivation

Track changes in greenhouse light levels to assess natural light availability and support supplemental lighting management.

crop growth research

Record photosynthetically active radiation data to study the relationship between light exposure, photosynthesis, and crop development.

Ecological environment monitoring

Measure light conditions in vegetation-covered areas to support research on canopy light distribution, vegetation growth, and ecosystem responses to environmental changes.

Smart agricultural system

Supply PAR measurements to agricultural monitoring systems for data-based lighting management and assessment of crop growing conditions.

Weather station monitoring

Integrate the PAR sensor into compatible weather stations and data acquisition systems for continuous agricultural meteorological and environmental data collection.

Greenhouse Weather Station for Leaf Vegetable Film Greenhouse Monitoring

At a modern agricultural demonstration base in Hebei, China, a greenhouse weather station was installed to monitor environmental conditions in multi-span film greenhouses. The system continuously records temperature, humidity, and light intensity, while the RY-CGH photosynthetically active radiation sensor is available as an optional module for measuring PAR and assessing light conditions for crop growth. With on-site LED display, 4G remote data transmission, and historical data access, the system helps growers track environmental changes and make more informed decisions about shading, ventilation, and greenhouse management.

greenhouse weather station for nursery management

Greenhouse Compact Agricultural Weather Station

RY-CGH Photosynthetically Active Radiation Sensor Customization

Customize the RY-CGH photosynthetically active radiation sensor configuration to suit your measurement requirements, installation conditions, and monitoring system. Our team can assess your project specifications and recommend suitable sensor options for integration into Smart Agricultural Solutions.

Customization Options

Measurement Range and Performance: Specify your required PAR measurement range and measurement conditions for configuration assessment.
Signal Output: Select available output options, such as RS485, voltage, or current, subject to model compatibility.
Mounting Options: Discuss mounting brackets, fixing methods, and installation requirements for your monitoring setup.
Environmental Requirements: Provide site temperature, humidity, and exposure conditions so suitable protection and operating specifications can be evaluated.
Housing and Dimensions: Discuss enclosure dimensions, cable routing, and space constraints for your installation.

photosynthetically active radiation sensor Manufacturer and Supplier

Yantai Sensor develops sensor products and monitoring solutions for agricultural meteorology, environmental monitoring, and related applications. Our production and testing capabilities support the supply of photosynthetically active radiation sensors for different monitoring requirements. We also provide OEM/ODM services, protocol development, structural customization, and functional expansion for projects requiring specific configurations.

Learn more about Yantai Sensor’s manufacturing capabilities and quality control, or contact our team to discuss your PAR sensor requirements.

Certificates

We have CNAS, ISO, CE, and RoHS certifications, and all weather monitoring systems meet rigorous international standards.

FAQs

What Does a Photosynthetically Active Radiation Sensor Measure?

A photosynthetically active radiation sensor measures light in the 400–700 nm spectral range used by plants for photosynthesis. Depending on the model, readings may be expressed as photosynthetic photon flux density (PPFD) in μmol·m⁻²·s⁻¹. These measurements help growers and researchers monitor light availability, compare growing conditions, and analyze changes in plant environments over time.

How Do I Choose the Right PAR Sensor for My Application?

Select a PAR sensor based on the expected light intensity, measurement range, output signal, environmental conditions, and data acquisition requirements. Greenhouse operators may prioritize continuous monitoring and system integration, while field researchers may need consistent positioning and documented calibration. Before ordering, compare the manufacturer’s specifications with your actual operating conditions rather than choosing by price or response time alone.

What Is the Difference Between a PAR Sensor and a Lux Meter?

A PAR sensor measures photosynthetically active radiation for plant-related applications, while a lux meter measures illuminance weighted to human visual sensitivity. PAR measurements are commonly expressed as PPFD, whereas illuminance is measured in lux. The two values are not directly interchangeable because their spectral weighting differs. For crop lighting assessment, select the instrument according to the measurement required by your research or growing system.

Which Output Interface Should I Choose for a PAR Sensor?

The appropriate output depends on the monitoring equipment and system architecture. An RS485 PAR sensor can communicate with compatible data loggers or controllers using a supported protocol, while analog voltage or 4–20 mA outputs require matching input channels. Before purchase, confirm the available output for the selected model, power supply, wiring, communication settings, and cable requirements to avoid integration problems.

How Can I Improve the Reliability of PAR Sensor Readings?

Reliable PAR measurements depend on suitable sensor placement, a clean sensing surface, stable mounting, and appropriate calibration. Avoid unintended shading from greenhouse structures, equipment, or nearby plants when measuring general light availability. For comparisons over time, maintain consistent sensor positioning and installation conditions. If measurement accuracy is important to the project, review the manufacturer’s accuracy specifications and calibration documentation before deployment.

Can a PAR Sensor Be Used in Outdoor Agricultural Monitoring?

A PAR sensor can be installed outdoors when its operating temperature, humidity limits, and enclosure protection meet the site conditions. For agricultural weather stations and field monitoring, position the sensing surface to avoid unintended obstruction and secure the cable connections against environmental exposure. Check the selected model’s specifications before installation, particularly where rain, dust, or seasonal temperature changes may affect long-term operation.

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