The MS-40M is an ISO 9060:2018 Class C (Second Class) pyranometer which is based on EKO's universal sensor platform with Modbus 485 RTU output. This sensor can be used in many meteorological networks and professional small scale PV sites where solar radiation is taken seriously. The MS-40/40A/40M can be used with the optional MV-01 ventilator / heater or can be combined with the optional mounting kit for albedo measurements.
The MS-40M pyranometers are manufactured in a consistent way followed by strict quality inspection and performance evaluation. EKO provides a unique calibration compliant to the international standards defined by ISO/IEC17025/9847.
The sensor has a 5 year warranty with a 2 year re-calibration interval recommended and it is no longer necessary to change the desiccant.
ISO 9060:2018: Class C
ISO 9060:1990: Second Class
Sub-category "Spectrally flat": Compliant
Sub-category "Fast response": Not compliant
Output: Digital (Modbus RTU)
Response time 95%: < 18 Sec.
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
Non-stability change/1 year: +/- 1.5 %
Non-linearity at 1000W/m²: +/- 1 %
Directional response at 1000W/m²: +/- 20 W/m²
Spectral error: +/- 0.2 %
Temperature response -10°C to 40°C: +/- 3 %
Temperature response -20°C to 50°C: +/- 3 %
Tilt response at 1000W/m²: +/- 1 %
Operating temperature range: -40 - 80 °C
Irradiance range: 0 - 2000 W/m²
Wavelength range: 285 - 3000 nm
Ingress protection IP: 67
Cable length: 10 m
Power supply: 12 - 24 VDC
Power consumption: 0.2 - 0.3 W
Additional signal processing errors: +/- 1.5 W/m²