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Pyranometers

EKO MS-series pyranometers comply with the ISO 9060 and WMO standards and are very reliable.

The new MS-80 completes the range of high quality pyranometers. With impressive specifications, based on completely new pyranometer architecture make the MS-80 pyranometers a unique product in the sensor market.

The MS-802 highest class ISO Secondary Standard is used for the most demanding applications in PV, field research and solar radiation monitoring of global, tilted and diffuse irradiance.

Those are all thermopile type pyranometers which have a 180 degree field-of-view for measuring the hemispheric solar radiation with a cosine-weighting function. Depending on the model either one or two transparent glass domes protect the sensor efficiently from thermal effects.

EKO has over 65 years of experience in developing and manufacturing solar radiometers. This know-how is integrated into the MS-series to present a fully-sealed and all-weather instrument built to measure the global solar irradiance in unattended outdoor installations throughout the year. All EKO sensors provide a perfect balance between cost-effectiveness and quality.

Models

Product Model Description
MS-80 Pyranometer

MS-80 Pyranometer

EKO’s new generation sensors broke with the rules of traditional pyranometer architecture. The …
MS-802 Pyranometer

MS-802 Pyranometer

The MS-802 Secondary Standard Pyranometer is the ultimate reference sensor to measure global solar …

MS-402 Pyranometer

MS-402 Pyranometer

The MS-402 Pyranometer is a unique ISO First class pyranometer and best in its category. As the only …
MS-410 Pyranometer

MS-410 Pyranometer

The MS-410 pyranometer measures the broad-band global solar irradiance. The MS-410 is perfectly suited …

MS-602 Pyranometer

MS-602 Pyranometer

Within the MS-series the MS-602 pyranometer is the smallest true thermopile pyranometer. It is …

Specifications

Specifications (typical)

MS-80

MS-802 /

MS-802F

MS-402 /

MS-402F 

 MS-410

MS-602 

ISO 9060 classification

Secondary

Standard

Secondary

Standard

 First Class

 First Class

 Second Class

Response time 95% (sec)

 < 0.5

< 5

 < 8

 < 18

< 17

Zero offset 

- Thermal radiation (200W/m²)

 < 1 W/m²

< 6 W/m²

 < 6 W/m²

 < 6 W/m²

 < 10 W/m²

 Zero offset 

- Temperature change (5K/hr)

 +/- 1 W/m²

+/- 2 W/m²

 +/- 2 W/m²

 +/- 2 W/m²

 +/-  6 W/m²

Non-stability (change/year)

 +/- 0.5 %

5 years

+/- 0.5 %

 +/- 0.5 %

  +/- 1.5 %

 +/- 1.7 %

Non-linearity (at 1000W/m²)

 +/- 0.2 %

 

+/- 0.2 %

 +/- 0.2 %

 +/- 1 %

+/- 1.5 % 

Directional response

(at 1000W/m²)

 +/- 10 W/m²

 

+/- 10 W/m²

 +/- 20 W/m²

  +/- 20 W/m²

+/- 25 W/m² 

Spectral selectivity (0.35-1.5µm)

 +/- 3 %

 

+/- 3 %

 < 3 %

  < 3 %

< 3 % 

Temp. response (for 50°C band)*

 < 1 % / <0.3% 

(70°C band)

< 1 %

 < 1 %

  +/- 2 %

+/- 2 % 

Tilt response (at 1000W/m²)

 +/- 0.2 %

 

+/- 0.2 %

 +/- 0.2 %

 +/- 2 %

+/- 2 % 

Sensitivity (µV/W/m²)

 Approx. 10

Approx. 7

 Approx. 7

 Approx. 10

Approx. 7 

Impedance (Ω)

 45k

Approx. 500

 Approx. 500

  20 - 140

20 - 140 

Operating temperature range (°C)

 - 40 to +80

 

- 40 to +80

 - 40 to +80

 - 40 to +80 

 - 40 to +80

Irradiance range (W/m²)

 0 - 4000

0 - 4000

0 - 4000

0 - 2000

0 - 2000

Cable length

 10m

10m

 10m

 10m

10m 

Wavelength range in nm

285 to 3000

285 to 3000

 285 to 3000

 285 to 3000

  285 to 3000

Ingress protection 

 IP 67

IP 67

IP 67

IP 67

IP 67

* <1% (70°C band) / < 0.3% (70°C band for MS-80A and MS-80M)

Applications

Solar radiation energy budget studies

Solar radiation energy budget studies

The Meteorological research community is very ambitious to understand climate changes and global impact on life. With modern advanced measurement equipment, e.g. satellites, remote ...

Solar Radiation Measurements in PV applications

Solar Radiation Measurements in PV applications

Solar radiation is not only the driving force behind the Earth’s weather phenomena, it also drives photovoltaic energy production. One day of solar energy received by the Earth ...

Solar Reference sensor for PV research and performance monitoring

Solar Reference sensor for PV research and performance monitoring

Measuring solar irradiance is most essential to determine the efficiency of a PV module or total PV plant. To perform reliable and accurate radiation measurements need some knowledge ...

DHI Measurements

DHI Measurements

Diffuse Horizontal Irradiance measurements are performed with a thermopile sensor (Pyranometer) mounted on a Sun tracker or shadow band.  When the pyranometer is installed on ...

Outdoors Material testing

Outdoors Material testing

Weathering of materials is most often an irreversible process affecting the cosmetic properties or strength of materials. This aging process is mainly driven by UV radiation, Heat, ...

Performing accurate solar radiation measurements

Performing accurate solar radiation measurements

Conducting reliable and accurate solar radiation measurements needs some knowledge and attention: think of environmental influences (wind, rain/snow, soling), re-calibration (bi-annually), ...

Calibration procedures

EKO Instruments Co. Ltd. calibration laboratory are accredited and certified by PJLA (Ref: #74158) to perform pyranometer and pyrheliometer calibrations in accordance with the requirements of ISO/IEC17025, which are relevant to calibration and testing.

EKO offer a unique manufacturer calibration service for pyranometers and pyrheliometers in-house. Based on the applied calibration methods EKO provides the best quality solar sensor calibrations compliant to the international standards defined by ISO/IEC17025 / 9847 (Indoor method) and 9059 (Outdoor method), as defined by the scope of calibrations.

ISO/IEC17025 provides a globally accepted basis for laboratory accreditation that specifies the management and technical requirements. With calibrations performed at the EKO Instruments laboratory we enable our customers to:

  • Clearly identify the applied calibration methods and precision
  • Be traceable to the World Radiation Reference (WRR) through defined industrial standards:
    • ISO9846 Calibration of a pyranometer using a pyrheliometer
    • ISO9847 Calibration of field pyranometer by comparison to a reference pyranometer
    • ISO9059 Calibration of field pyrheliometers by comparison to a reference pyrheliometer
    • Obtain repeatable and reliable calibration test results through consistent operations yearly examined independently to assure strict compliance to the requirements.

 

Our clients will obtain a high level of confidence when purchasing an ISO/IEC17025 calibrated sensor. Our Accredited lab is regularly re-examined to ensure that they maintain their standards of technical expertise.

 

ISO17025

Scope of accreditation

(Download)

PYRANOMETERCALIBRATIONPROCEDURE_ISO17025_KH_140306

Pyranometer and Pyrheliometer

Calibration Procedures

(Download) 

Re-calibration

The sensitivity of the pyranometer will slightly deviate with time when it is exposed to radiation. Therefore it is advised to re-calibrate the sensor every two years. For calibration services contact EKO Instruments Co.

Frequently Asked Questions

Added value of using a shaded pyranometer

Added value of using a shaded pyranometer

For PV application, what will be the added value of using a shaded pyranometer in comparison to direct and global horizontal measurements?  For direct solar radiation measurements ...

Advantages of Pyranometers versus Reference cell

Advantages of Pyranometers versus Reference cell

What will be the advantages of using a pyranometer over a reference cell? Reference cells are widely used to measure the irradiance in absolute units (W/m2) in monitoring applications ...

Soiling effect versus measured irradiance

Soiling effect versus measured irradiance

What is the effect of soling versus the measured irradiance? Measuring solar radiation with pyranometers, pyrheliometers or spectroradiometer, soiling has will have an effect ...

Frequency of dome cleaning?

Frequency of dome cleaning?

How often should a pyranometer dome be cleaned? Measuring solar radiation with pyranometers, soiling has a potential effect on the pyranometers output (irradiance). However due ...

Re-calibration interval of solar sensors

Re-calibration interval of solar sensors

The sensitivity of the solar sensor will slightly deviate with time when it is exposed to solar radiation. Therefore it is advised to re-calibrate the sensor every two years. For calibration ...

Characteristics of Pyranometers

Characteristics of Pyranometers

What are the characteristics of Pyranometers in ISO? Characteristics of pyranometers are stated under ISO9060 and categorized into three classifications: Secondary Standard, First ...