MS-90 DNI Sensor

  • DNI measurement (<10% uncertainty)
  • Pulsed analog output 0-2V
  • Spectral range 300 - 2500nm
  • No sun-tracker required
  • Configurable to measure DNI / GHI / DHI
  • Optional C-Box with GPS and Modbus output
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A new sensor which accurately measures the Direct Normal Irradiance (DNI) without the requirement of a sun-tracker. It features a rotating mirror, which only reflects the sunbeam onto a thermal detector. The pulsed analog output can work with dataloggers with a pulsed analog input or peak hold function. The analog pulse (0-2V) is proportional to the DNI.  

Optional control box with GPS antenna (C-Box) can be used to connect MS-90 and any pyranometer to create a digital solar monitoring station measuring Direct Normal Irradiance (DNI), Global Horizontal Irradiance (GHI), and calculating Diffuse Horizontal Irradiance (DHI). This system provides Modbus 485 RTU output for all parameters from a single cable.

A revolutionary method to capture the direct sunbeam. MS-90 is …

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System configuration


MS-90 Plus+
  Specifications MS-90
  ISO 9060:2018 Class C (DNI)
  Output 0-2V (Pulse)
Temperature response -20°C to 40°C +/- 5 %
Non-linearity +/- 2.5 %
  Operating temperature range -20 - 50 °C
Wavelength range 300 - 2500 nm (50% points)
  Power supply 10.5 - 12.5 VDC
  Dimensions mm 350 (W) x 250 (L) x 200 (H) (Incl. optional base plate)
Weight 2.5 kg
  Ingress protection IP 67
  Cable length 10 m
  Geographic application Lattitude (-58º to 58º ) / Longitude (0º to 360º)
Power consumption < 6 W

MS-90 DNI Sensor

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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