EKO INSTRUMENTS CO., LTD. - Pyranometers MS-802/802F/402/402F/602 - Instruction Manual Ver.13
EKO started to develop its first pyranometer in 1955. This traditional product range has been improved and
extended ever since. During the last decade, EKO introduced an extended range of high-precision thermopile-type
pyranometers. The current high-quality broad-band pyranometer series is designed to be used in any outdoor
environments and is perfectly suited for the most demanding field reference applications in the photovoltaic and
meteorological markets. EKO pyranometers are widely used around the world and meet the highest ISO and WMO
standards. The highest class ISO9060:2018 “Spectrally flat of Class A” MS-802 Pyranometer is designed for the
most demanding applications in field research and monitoring of global and diffuse solar radiation.
EKO has over 50 years of experience in developing and manufacturing solar radiation sensors. This know-how is
integrated into the EKO pyranometer-series which provides a fully-sealed and all-weather proof radiometer built to
measure the global solar irradiance in unattended outdoor installations throughout the year. All EKO instruments
provide a perfect balance between cost-effectiveness and quality.
4-1. About the Pyranometer Series
EKO offers three types of thermo-pile based pyranometers to cover all three ISO9060 standard classes,
which are “Class A”, “Class B” and “Class C”. With this wide range of instrument types, EKO pyranometers
can meet all possible application requirements, ranging from PV module efficiency measurements to
climatology research and material durability testing. In the following paragraphs, the four instrument types are
described individually.
1. MS-802/MS-802F
The MS-802 ISO9060:2018 spectrally flat of Class A pyranometer is used widely as a reference sensor to
measure the global broad-band solar radiation with a high accuracy. Its robust brass housing makes it a
durable sensor suitable to be used in harsh environments. The MS-802 is used as a standard for PV research
and climatology studies around the world.
MS-802 pyranometer has the following key features:
Fast Response time (95% signal level in < 5s)
Temperature compensated over a wide temperature range
High quality optical glass domes providing accurate cosine response
MS-802F is a MS-802 pyranometer with ventilation system that minimizes the negative effects of frost,
snow and dust on the measurements
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