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EKO MS-40 Pyranometer


Make:  Eko Model:  MS-40
✅ Most cost-effective irradiance sensors, designed to measure Solar irradiance across the full solar spectrum.
✅ Measurand: Solar Radiation
✅ Sensor Type: Thermopile
✅ Standards & Classifications: ISO 9060:2018 Class C
✅ Signal Output: Analog (mV)
✅ Supplied With: 10m Cable (Optional lengths 20m, 30m, 50m), Factory test/ Calibration Certificates.

The MS-40 is an ISO 9060:2018 Class C pyranometer based on EKO’s universal sensor platform. It is the most cost-effective irradiance sensor to measure Solar irradiance across the entire solar spectrum and is designed for agro-meteorological networks and professional small scale PV sites.

Featuring an analog (mV) output, every MS and S-Series Pyranometer, including the MS-40, is compatible with the optional MV-01 ventilator & heater and albedo mounting kit and is manufactured with strict quality controls and performance standards.

EKO provides a unique calibration compliant with the international standards defined by ISO 17025 and IEC 9847.

The sensor also has a 5-year warranty with a two year recommended recalibration interval and no requirement to change the desiccant.


Eko (Japan)



Weight (Mass)



Voltage (mV)

Measuring Range

0 to 2000 W/m²


Class C

Long-term Instability

± 1.5 %


± 1 %

Operating Conditions

-40 to 80 °C


Approx. 7 to 14μV/W・m-2

Spectral Range

285 to 3000nm

Zero off-set a) 200W/m²

± 12 W/m²

Zero off-set b) 5K/hr

± 5 W/m²

Complete zero off-set c)

± 17 W/m²

Tilt Response

± 1 %

Spectral Error

± 0.2 % (Spectral selectivity ± 3%)

Temperature Response

± 3 %

Response Time (95%)

< 18 Sec

Protection Level

IP 67

Cable length

10m (Optional lengths 20m, 30m, 50m)

  • What Is output of MS-40 Pyranometer?

    The MS-40 provide a Analog (mV) output.