Solar Radiation and Light Sensors – Rika

Solar Radiation Sensor

We offer two types of solar radiation sensor: silicon-cell and thermopile pyranometers, both types are now ISO 9060:2018 Class C rated (previously known as a second class). Silicon-cell solar radiation sensor model is excellent for applications that do not require high accuracy and with a limited budget. It is with faster response time and a more competitive price. But the solar pyranometer has higher errors under cloudy conditions. Our new cost-effective thermopile pyranometers feature a blackbody thermopile detector that provides a much broader and more uniform spectral response for better performance in all atmospheric conditions. Illuminance sensor for solar radiation measurement is widely used for shortwave radiation measurement in agricultural, ecological, and hydrological weather, and optimizing photovoltaic systems.

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Solar Radiation and Light Sensors – Rika

RK200-04 Solar Radiation Sensor

Used for measuring solar radiation within 300-3000nm wavelength. If the sensing face is downwards, it can test the reflected radiation and solar radiation on the incident to the inclined plane.

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RK200-04 Solar Radiation Sensor is designed on basis of optical principle. It is mainly used for measuring solar radiation within 300-3000nm wavelength. If the sensing face is downwards, it can test the reflected radiation and solar radiation on the incident to the inclined plane. If shad is added, it can test the scattered radiation. It is widely used to monitor the solar radiation in meteorology, solar energy, agriculture, construction materials aging and atmospheric pollution and etc..

Features:

Designed on silicon-cell principle
No moving parts, no maintenance, can work in any altitude
High sensitivity
Low power consumption
Light weight, long service life
Used as sunshine duration sensor

Applications:

Meteorology
Agriculture
Construction materials aging monitoring
Air pollution monitoring
Solar energy

Specifications:

Item	SPECIFICATIONS
Spectral range	300～1100nm
Supply	5V,12-24VDC
Range	0-1500W/m2
Resolution	1W/m2
Output	0-5V,4-20mA,RS485
Response time	≤5s
Cosine correction	≤±10%(Solar elevation angle=10°)
Non-linear	≤±3%
Temperature effect	±0.08%/℃
Stability	≤±2%/year
Operating Temperature	-40℃-+80℃
Ingress Protection	IP65
Weight(unpacked)	420g
Shell material	Aluminum alloy
Storage Condition	10℃-60℃@20%-90%RH

The product can be used as a sunshine time sensor

Sunshine hours is the sum of time periods that the sun direct irradiance intensity to reach or exceed 120W/m2 time , hour as a unit, a decimal. Sunshine-hours is also known as actual irradiance time.

Dimension:

Unit:mm
In order to ensure measurement accuracy, please keep the horizontal installation.

Mounting & Maintenance:

The sensor should be installed in the open air without any shield above the sensing surface .
The sensor connector should be faced to the north, fix it after the horizontal position is well adjusted.
Please check the filter cover regularly & make sure it is clean.
Please do not remove or loose the filter cover, otherwise the accuracy will be affected.
Please make sure the desiccant to be dry (If the color of desiccant is changed from blue to red, it should be replaced)
Protection cover is not necessary in general rainfall, but if prolonged heavy rains or hail, the protective cover is recommended to be installed.
The sensitivity is recommended to be re-calibrated after two years use.

Product Details:

Part No	Product Detail	Price (ex-GST)
RK200-04	Solar Radiation Sensor Housing Material: Aluminium alloy Measure spectral range: 300-1100nm Range: 0-1500W/m2 Sensitivity: 7-14UV/w/m-2 Output signal: 4-20mA/0-5V/RS485/SDI-12 Power supply: 5V/12-24VDC	$371.94

Data sheet on RK200-04 Solar Radiation Sensor (pdf, opens in a new tab)

RK200-02 PAR Sensor

Used for measuring solar radiation within 400~700nm wavelength. It is easy installation and can work continuously in all weathers.

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The RK200-02 PAR Sensor is mainly used for measuring solar radiation within 400~700nm wavelength. It is easy installation and can work continuously in all weathers. When there is sunlight, voltage output proportional to incident light intensity will be generated by the silicon-photo detector in the sensor. Its sensitivity is proportional to the cosine of incident light direct angle. Each product is with one sensitivity coefficient respectively. It can directly output radiation value in unit of μ*mol/m2*s.

Features:

Metal construction
Harsh environment workable
High sensitivity
No power supply measurement
Compact size for easy use

Applications:

Agrometeorological research
Crop growth monitoring
Ecological research
Environment surveillance
Greenhouse control

Specifications:

Item		Specifications
Spectral range		400～700nm
Supply		5VCD,12V-24VCD
Accuracy		±5% rdg
Range		0-2500μmol/m2s or 0-2000W/m2
Output		0-2000mV	4-20mA(2-wires)	RS485
Sensitivity	0-2500μmolm2*s	800μv/μmolm2*s	6.4μA/μmolm 2 *s	/
	0-2000W/m2	1000μV/W/m 2	8uA/W/m 2	/
Response time		＜1s（99%）
Temperature effect		＜0.05%/℃
Cosine correction		＜10%（until 80°）
Non-linearity		<±2%
Operating temperature		-40-+80℃
Shell material		Aluminum alloy
Storage Condition		10℃-60℃@20%-90%RH

Output Characteristics:

0-2000mV

Range:0-2000W PAR values(W)= Voltage output value(μV)/1000
Range:0-2500μ*mol/m²*s PAR values(μ*mol/m²*s)= Voltage output value(μV)/160

4-20 mA

Range:0-2000W PAR values(W)=(I(μA)-4000μA)/0.8 (Where I is output current value,unit:μA )
Range:0-2500μ*mol/m²*s PAR values(μ*mol/m²*s)= (I(μA)-4000μA)/6.4(Where I is output current value,unit:μA )

RS485

MODBUS-RTU

Dimension:

Unit:mm

In order to ensure measurement accuracy, please keep the horizontal installation.

Product Details:

Part No	Product Detail	Price (ex-GST)
RK200-02	PAR Sensor Spectral range:400～700nm Range: 0-2500μmol/m2s Accuracy: ±5% rdg Output signal: 0-2V/0-5V/4-20mA/RS485 Power supply: 12-24VDC	$479.24

Data sheet on RK200-02 PAR Sensor (pdf, opens in a new tab)

RK200-03 Pyranometer Radiation Monitor

Based on thermopile principle; sensing elements are made by winding – plated thermopiles with multi contacts. Its surface is coated by black coating with high absorption rate.

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The RK200-03 Pyranometer is produced based thermopile principle; sensing elements are made by winding – plated thermopiles with multi contacts. Its surface is coated by black coating with high absorption rate. Hot contacts on the sensors surface, while the cold junction is located within the body, temperature difference between the hot and cold junction generates electromotive force, the thermoelectric effect is proportional to the solar radiation. In order to reduce the ambient temperature effect ,temperature compensation circuit designed here to reduce the effects to products properties.

Features:

Conform to the WMO standard
Suitable for harsh environment
With horizontal bubble
High sensitivity
Double transmission glass
Visual desiccant window
Easy installation

Applications:

Solar energy & photovoltaic power generation
Agriculture and forestry monitoring
Crop growth monitoring
Tourism eco
Weather stations

Specifications:

Item	Specification
Spectral range	300-3200nm
Supply	5V,12-24VDC
Range	0-2000W/m2
Output	0-20mV,0-5V,4-20mA,RS485‚
Sensitivity	7-14μVW-1m2
Internal resistance	350Ω
Non-linearity	<±2%
Measuring angle	2π solid angle
Response time	≤35s(99%)
Zero drift (temperature drift:5k/h)	±5W/m2
Stability	±2%/year
Cosine correction	≤±7%(Solar elevation angle=10°)
Temperature effect	±2%(-10℃-+40℃)
Operating temperature	-40℃-+80℃
Recalibration interval	2 years
Desiccant	Silica gel desiccant
Weight(unpacked)	2.5kg
Pack	Aluminum alloy instrument box
Dimension	ø165*120mm
Installation bracket(optional)	Horizontal bracket or adjustable angle bracket
Ingress Protection	IP65
Storage Condition	10℃-60℃@20%-90%RH

If you choose 0-20mv signal output, without power supply.
If you choose RS485/0-5V/4-20mA output signal, the external signal conversion module(98*66*49mm) will be additional.

Output Characteristics:

0-20mV

Solar radiation values(W/m2)= Voltage output value(μV)/sensitivity coefficient(μV*W-1*m2),
Each product is with one sensitivity coefficient respectively (It is mentioned on the product’s label)

0-5V

Solar radiation values(W/m2)=(V/5)*2000(Where V is output voltage value, unit: V )

4-20mA

Solar radiation values(W/m2)=(I-4)/16*2000(Where I is output current value, unit: mA )

RS485

MODBUS-RTU

Dimension:

Unit:mm
In order to ensure measurement accuracy, please keep the horizontal installation.

Mounting & Maintenance:

The sensor should be installed in the open air without any shield above the sensing surface .
The sensor connector should be faced to the north, fix it after the horizontal position is well adjusted.
Please check the filter cover regularly & make sure it is clean.
Please do not remove or loose the filter cover,otherwise the accuracy will be affected.
Please make sure the desiccant to be dry (If the color of desiccant is changed from blue to red, it should be replaced)
Protection cover is not necessary in general rainfall, but if prolonged heavy rains or hail, the protective cover is recommended to be installed.
The sensitivity is recommended to be re-calibrated after two years use.

Product Details:

Part No	Product Detail	Price (ex-GST)
RK200-03	Pyranometer Housing Material: Aluminium alloy Measure spectral range: 300-3200nm Range: 0-2000W/m2 Sensitivity: 7-14UV/w/m-2 Output signal: 4-20mA/0-5V/RS485 Power supply: 5V/12-24VDC	$740.76

Data sheet on RK200-03 Pyranometer Radiation Monitor (pdf, opens in a new tab)

RK200-07 Ultraviolet(UV) Radiation Sensor

Used to measure the atmosphere of the sun’s ultraviolet radiation (UVA & UVB), supporting the product related information acquisition instrument use can provide public concern: the UV index, UV erythema measurement

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RK200-07 UV Radiation Sensor is a precision instrument used to measure the atmosphere of the sun’s ultraviolet radiation (UVA & UVB), supporting the product related information acquisition instrument use can provide public concern: the UV index, UV erythema measurement, on the health effects of the UV and UV special biology and chemistry, highly meteorology, industry, construction, medical attention, are widely used in the exposure caused erythema dose, integrated environment ecological effect, the study of climate change and ultraviolet radiation monitoring and forecast.

Features:

Light weight
No moving parts, no maintenance, can work in any altitude
High sensitivity
Low power consumption
Long service life

Applications:

Tourism weather
Breeding industry
Construction materials aging monitoring
Medical research
Environmental monitoring

Specifications:

Item	SPECIFICATIONS
Spectral range	280～400nm
Supply	5V,12-24VDC
Range	0-200W/m2, 0-200uW/cm 2(only for 0-2V output) , 0-15UV index
Output	0-2V,0-5V,4-20mA(2-wire),RS485
Accuracy	±5% rdg
Response time	≤1s
Cosine correction	≤±4%(Solar elevation angle=30°)
Non-linear	≤±3%
Temperature effect	±0.08%/℃
Stability	≤±2%/year
Operating Temperature	-40℃-+85℃
Ingress Protection	IP65
Weight(unpacked)	150g
Shell material	Aluminum alloy
Storage Condition	10℃-60℃@20%-90%RH

If you choose to 0-5V,4-20mA or RS485 output signal, the need to add the external signal conversion module(98*66*49mm).

Dimension:

Unit:mm

Product Details:

Part No	Product Detail	Price (ex-GST)
RK200-07	UV Radiation Sensor Range: 0-200W/m2, 0-200uW/cm2, 0-15UV index Accuracy: ±5% rdg Output signal: 4-20mA/0-2V/RS485 Power supply: 12-24VDC	$550.76

Data sheet on RK200-07 Ultraviolet(UV) Radiation Sensor (pdf, opens in a new tab)

RK210-01 Illuminance Sensor

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RK210-01 Illuminance Sensor is very sensitivity and can detect weak light, has a wide measuring range, high accuracy, good waterproof performance, easy to use, easy to install. It’s suitable for most applications, especially in agricultural greenhouses, urban lighting and other places.

Features:

High sensitivity
Applicable to various harsh environments
High precision, wide measuring range
Compact size
Easy installation

Applications:

Agro-meteorological
Intelligent buildings
Greenhouse control
Weather stations
Crop monitoring

Specifications:

Item	Specification
Range	0-2000lux,0-20klux,0-200klux optional
Spectral range	380-780nm
Supply	5VDC, 12-24VDC
Output	4-20mA,0-5V,0-10V	RS485
Accuracy	<±5%FS	<±4%FS
Response time	1s
Temperature effect	±0.2%/℃
Repeatability	<1%FS
Display	LCD optional(ABS housing)
Operating temperature	-40℃-+75℃
Weight(unpacked)	170g
Shell material	ABS,metal shell can be customized

Dimension and mounting:

Unit:mm

Product Details:

Part No	Product Detail	Price (ex-GST)
RK210-01	Illuminance Sensor Shell material: ABS Range: 0-2000lux, 0-20klux, 0-200klux Spectral range: 380-780nm Accuracy: <±5%FS Output signal: 4-20mA/0-5V/RS485 Power supply: 12-24VDC	$170.76

Data sheet on RK210-01 Illuminance Sensor (pdf, opens in a new tab)

Solar Radiation and Light Sensors – Rika

On this page:

Other related pages:

Solar Radiation and Light Sensors – Rika

RK200-04 Solar Radiation Sensor

RK200-02 PAR Sensor

Output Characteristics:

RK200-03 Pyranometer Radiation Monitor

RK200-07 Ultraviolet(UV) Radiation Sensor

RK210-01 Illuminance Sensor