

EKO Instruments
EKO Instruments MS-40S Pyranometer
The S-Series ISO 9060:2018 MS-40S Class C Pyranometer is a cost-efficient part of the most accurate, reliable and robust family of pyranometers in the world, and the class-leading solution for system integrators, agrometeorological networks, and professional small-scale PV sites.
Overview
The S-Series MS-40S ISO 9060:2018 Class C pyranometer is a cost-efficient part of the most accurate, reliable and robust family of pyranometers in the world, and the class-leading solution for system integrators, agrometeorological networks, and professional small-scale PV sites.
Built with the same unique S-Series features as the Class A MS-80S and Class B MS-60S, the MS-40S comes with EKO’s 4-channel smart interface for compatibility with 99% of data loggers, DAQ, and SCADA systems, plus internal diagnostic sensors for remote visibility over internal temperature, humidity, tilt and roll angle; ensuring optimum performance with reduced maintenance costs.
With Level A EMI/EMC electronic surge filter and protection, ISO 17025 accredited calibration, the MS-40S is the toughest, most reliable, and advanced Class C pyranometer available.
Key Features
- Smart 4-channel Analogue & Digital Interface
- Level A EMI/EMC electronics surge filter & protection
- Internal Diagnostics for temperature, tilt, roll, and humidity
Comparison
Comparison of EKO Instruments Pyranometers
| MS-40 | MS-40S | MS-60 | MS-80 | MS-80S | MS-80SH | ML-01 SI | |
| ISO 9060:2018 | Class C | Class C | Class B | Class A | Class A | Class A | Class C |
| Response Time 95% | < 18 Sec | < 18 Sec | < 18 Sec | < 0.5 Sec | < 0.5 Sec | < 0.5 Sec | < 1 msec |
| Wavelength Range | 285 - 3000 nm | 400 to 1100 nm | |||||
| Directional response (at 1000W/m² | 0 to 80°) | ± 20 W/m² | ± 20 W/m² | ± 18 W/m² | ± 10 W/m² | ± 10 W/m² | ± 10 W/m² | < 10 W/m² |
| Signal Output | N/A | Modbus 485 RTU / 4-20mA / 0-1V | N/A | ±10µV/W/m² | Modbus 485 RTU / 4-20mA / 0-1V | Modbus 485 RTU / SDI-12 | Analog (mV) |
| Ingress protection | IP67 | Equivalent to IP67 (IEC60529, JIS C0920) | |||||
| Power Consumption | 0W | <0.2W (Digital), <0.7W(Analog) | N/A | 0W | <0.2W (Digital), <0.7W(Analog) | < 1.4 W | N/A |
| Pyranometer Type | Thermopile Pyranometer | Si-Pyranometer | |||||
| IEC 61724-1:2021 | IEC Class C | IEC Class C | - | IEC Class A | - | IEC Class A | IEC Class C |



