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MS-80 Albedometer


Make:  Eko    Model: MS-80
✅ Designed to measure albedo with the lowest uncertainty across various applications, including meteorology and in solar power plants with bifacial PV modules.
✅ Measurand : Albedo.
✅ Sensor Type : IEC 61724-1 compliant photovoltaic system performance monitoring.
✅ Signal Output : Modbus 485 RTU, configurable SDI-12, 4-20mA, configurable 0-10mA and 0-1V with external precision shunt resistor 100Ω.
✅ Supplied With : 10m (Optional lengths 20m, 30m, 50m), MV-01 ventilator and heater, cable extensions and albedo mounting plates.
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MS-80 Albedometer consists of two MS-80 pyranometers and a special albedo kit with a glare screen to measure the albedo with the lowest uncertainty.

It is used in solar power plants with bifacial PV modules and in meteorological applications.

MS-80 is a unique pyranometer compliant to the “Fast reponse” and “Spectrally flat” sub-category under ISO 9060:2018 Class A. The innovative patented design was inspired by the combination of latest technologies and state-of-the-art thermopile sensor, enabling a breakthrough in unprecedented low zero-offset behavior and fast sensor response.

The compact sensor with a single dome, based on an isolated thermopile detector and Quartz diffusor is immune to offsets and integrates all optional value-added functions such as a ventilator, heater and different industrial interfaces. The heater and ventilator are suggested, particularly in areas impacted by dew, frost, snow, and dust.

The MS-80A is an MS-80 with a built-in 4-20mA converter and MS-80M with built-in MODBUS converter. They are compatible with the industrial output standards. Due to the ultra-low temperature dependency and exceptional non-linearity characteristics, the converter guarantees an optimal sensor performance, under any environmental conditions.

The MS-80 pyranometers are manufactured in a consistent way followed by strict quality inspection and performance evaluation. For each sensor, the directional response and temperature dependency are measured and validated through a measurement report that comes with the sensor. EKO provides a unique calibration compliant to the international standards defined by ISO/IEC17025/9847.

The sensor has a 5 year warranty, 5 year recommended re-calibration interval and no longer the requirement for the desiccant to be changed.


Eko (Japan)


MS-80 Albedometer

ISO 9060:2018

Class A

ISO 9060:1990

(Secondary Standard)

Sub-category "Spectrally flat"


Sub-category "Fast response"



Analog (mV)

Response time 95%

< 0.5 Sec.

Zero offset A - Thermal Radiation (200W/m²)

±1 W/m²

Zero offset B - Temperature change (5K/hr)

±1 W/m²

Zero offset C - Total zero off-set

± 2W/m²

Non-stability (change/year)

< 0.5%/5 years

Non-linearity (100 to 1000W/m²)

± 0.2%

Directional Response (at 1000W/m² | 0 to 80°)

± 10W/m²

Spectral Error

± 0.2%

Temperature Response (-20°C to 50°C)

± 1%

Tilt Response (0-90° | 1000W/m²)

± 0.2%

Wavelength Range (nm)

285 to 3000

Irradiance range (W/m²)

0 to 4000

Signal Output


Operating Temperature

-40 to +80°C

Supply Voltage

5 to 30 VDC

Power Consumption

0 W

Ingress Protection

IP 67

Calibration traceability / uncertainty

ISO 17025 / WRR / < 0.7% (k = 1.96)

Standard Cable Length

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