MS-402 Pyranometer

MS-402 Pyranometer

EKO Solar Radiation sensor.jpg
EKO Solar Radiation sensor MS-402F
EKO Solar Radiation sensor MS-402


  • Most accurate first Class Pyranometer
  • Reponse time (95% < 8s)
  • Temperature compensated <1% (for 50°C band)
  • Near Secondary standard specifications
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The MS-402 Pyranometer is a unique ISO First class pyranometer and best in its category. As the only first class sensor available on the market it has a built in electronic passive temperature compensating to linearize the detector temperature coefficient and make it accurate under all temperature conditions.
The design of the MS-402 First Class Pyranometer is very similar to the Secondary standard MS-802. Its robust brass mechanical construction makes it a durable sensor suitable to be used in harsh environments for routine global irradiance measurements. The MS-402 can be applied as multi purpose high quality monitoring sensor in the PV and Meteorological market. MS-402F is a MS-402 with 110VAC/12 VDC ventilation system to prevent any possible influence of frost, snow and dust.


Specifications (typical) MS-402 / MS-402F
ISO 9060 classification First Class
Response time 95% (sec) 8
Zero offset - Thermal radiation (200W/m²) < 6 W/m²
Zero offset - Temperature change (5K/hr) < 2 W/m²
Non-stability (change/year) < 0.5 %
Non-linearity (at 1000W/m²) < 0.2 %
Directional response (at 1000W/m²) < 20 W/m²
Spectral selectivity (0.35-1.5µm) < 1 %
Temp. response (for 50°C band) < 1 %
Tilt response (at 1000W/m²) < 0.2 %
Sensitivity (µV/W・m-2) Approx. 7
Impedance (Ω) Approx. 500
Operating temperature range (°C) - 40 to +80
Cable length 10m
Wavelength range  285 to 3000 nm



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