MS-57 Pyrheliometer

  • ISO 9060:2018 Class A (First Class)
  • "Fast response" and "Spectrally flat"
  • Ultra fast <0.2s response detector
  • Lowest measurement uncertainty
  • Options: ISO17025 / 9059 Outdoor calibration or Indoor calibration
  • Window heater to prevent dew and frost
  • 5 years warranty and recommended recalibration
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The new MS-57 pyrheliometer is a unique pyrheliometer compliant to the "Fast response" and "Spectrally flat" sub-category under ISO9060:2018 Class A. The pyrheliometer is a breakthrough
 in unprecedented low thermal offset behavior and 
fast thermopile response (< 0.2s / 95%). MS-57 pyrheliometer is a direct normal incidence (DNI) solar irradiance sensor. Also known as a pyrheliometer, it is used as a reference sensor for routine operation on a Solar Tracker. The all-weather MS-57 is responsive to solar irradiance in the spectral range from 200 – 4000nm and works under the most extreme conditions in a temperature range from -40°C - 80°C. The integrated low power window heater can prevent dew deposition or frost on the outside window.

Each MS-57 is …

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  Specifications MS-57
  ISO 9060:2018 Class A
  ISO 9060:1990 First Class
  Sub-category "Spectrally flat" Compliant
  Sub-category "Fast response" Compliant
  Output Analog (mV)
Response time 95% < 0.2 Sec.
Zero off-set a) 200W/m² 0 W/m²
Zero off-set b) 5K/hr < 1 W/m²
Complete zero off-set c) < 1 W/m²
  Non-stability change/1 year -
  Non-stability change/5 years < 0.5 %
Non-linearity at 1000W/m² < 0.2 %
Spectral error +/- 0.2 %
Temperature response -10°C + 40°C -
Temperature response -20°C to 50°C +/- 0.5 %
Tilt response at 1000W/m² < 0.2 %
Sensitivity Approx. 7 µV/W/m²
  Impedance < 15000 Ω
  Operating temperature range -40 - 80 °C
Irradiance range 0 - 4000 W/m²
Wavelength range 200 - 4000 nm (50% points)
  Ingress protection IP 67
  Cable length 10 m




Applications and uses

Concentrating Photovoltaics (CPV) is driven by only direct solar radiation. To quantify the energy efficiency of a CPV system the total DNI and direct spectral solar irradiance, called spectral DNI, can …

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