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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

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 (0-5V) is proportional to the DNI.

It can be used in combination with any pyranometer to measure the DNI and Global Horizontal Irradiance (GHI). Hence the Diffuse Horizontal Irradiance (DHI) can be calculated.

A revolutionary method to capture the direct sunbeam. MS-90 is a reinvention of the MS-093 sunshine duration meter, which is 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


0-2V (Pulse)

Temperature response -20°C to 40°C

+/- 5 %


+/- 2.5 %

Operating temperature range

-20 – 45 °C

Wavelength range

300 – 2500 nm (50% points)

Dimensions mm

350 (W) x 250 (L) x 200 (H) (Incl. optional base plate)


2.5 kg

Ingress protection IP


Geographic application

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

Power consumption

< 5 W


Cable length

20 / 30 / 50 m

Base plate

350 x 250 / leveling feet mm

Power supply

100 to 240 VAC / 12VDC / 200 x 140 x 80mm / 2.5 kg