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EKO MS-802 Pyranometer


Make: Eko                                      Model: MS-802
✅ The MS-802 Secondary Standard Pyranometer is the ultimate reference sensor to measure global solar irradiance with the highest precision.
✅ Measurand : Solar Radiation
✅ Sensor Type : Thermopile.
✅ Standards & Classifications: ISO 9060:2018 Class A.
✅ Signal Output :
✅ Supplied with : 10 m cable, Factory test/ Calibration Certificates.

EKO MS-802 Pyranometer:

The MS-802 ISO 9060:2018 Class A (Secondary standard) pyranometer is a reliable reference sensor for measuring global broad-band radiation with high precision. This top-of-the-line sensor is used as a standard in PV research and climatological studies around the world, making it a valuable tool for professionals in the field.

One of the key features of the MS-802 is its high-quality double-dome construction, which is designed to improve the accuracy of the measurement and minimize unwanted thermal offsets. Additionally, the ventilation unit of the MS-802F model will reduce the deposition of dust, dew, frost, and snow, ensuring that your measurements remain accurate and reliable.

At EKO, we take great care in manufacturing the MS-802 pyranometers in a consistent way. We then follow strict quality inspection and performance evaluation, so you can be sure that you’re getting a top-quality product. For each sensor, we measure and validate the directional response and temperature dependency through a measurement report that comes with the sensor, providing you with all the information you need to know about your sensor.

Furthermore, EKO provides a unique calibration service, compliant with the international standards defined by ISO9847, this ensures that your sensor is calibrated to the highest possible standards. With the MS-802, you can trust that your measurements will be accurate and reliable, making it the ideal sensor for any professional in the field.

Application and features of EKO MS-802 Pyranometer:



✅ Scientific research
✅ Industrial applications
✅ Photovoltaic system performance monitoring
✅ Large weather monitoring
✅ Climatological studies
✅ Secondary Standard Pyranometer
✅ Fast Response time (95% < 5s)
✅ Temperature compensated in a wide temperature range
✅ High-quality optical glass domes for proper cosine response
✅ MS-802F is a MS-802 with 110VAC/12 VDC ventilation system to prevent any possible influence of frost, snow and dust

Eko (Japan)




ISO 9060:2018: Class A
ISO 9060:1990: (Secondary Standard)
Spectrally flat
Fast response


Analog (mV)

Response time 95%

< 5 Sec.

Zero off-set a) 200W/m²

+/- 6 W/m²

Zero off-set b) 5K/hr

+/- 2 W/m²

Long-term instability

Non-stability change/1 years: +/- 0.5 %


Non-linearity at 1000W/m² : +/- 0.2 %

Spectral Error

+/- 0.23 %

Temperature Response

Temperature response -10°C to 40°C: +/- 1 %
Temperature response -20°C to 50°C: +/- 1 %

Tilt Response

Tilt response at 1000W/m²: +/- 0.2 %


Approx. 7 µV/W/m²

Operating Conditions

-40 – 80 °C

Measuring Range

0 – 4000 W/m²

Spectral Range

285 – 3000 nm (50% points)

Protection Level

IP 67

Cable length

10 m

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