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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

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 a reinvention of the MS-093 a reliable and accurate sunshine duration meter, which has been deployed within the AMeDaS network in Japan for over 10 years. More than 800 stations gather precise sunshine duration information every day. MS-90 is highly suitable to be applied in solar energy monitoring systems and meteorological networks.

Weight 14.5 kg
Dimensions 380 × 430 × 440 cm
ISO 9060:1990

Class C (DNI)



Temperature response -20°C to 40°C

+/- 5 %


+/- 2.5 %

Operating temperature range

-20 – 45 °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)


2.5 kg

Ingress protection IP


Cable length

10 m

Geographic application

Lattitude (-58º to 58º ) / Longitude (0º to 360º)

Power consumption

< 6 W