EKO MS-711 Spectroradiometer



Product Introduction
Product Features
Technical Details
Product Introduction

The new generation grating spectroradiometer MS-711 is designed to provide the most accurate solar spectral data outdoors. The MS-711 is a unique all weather sensor, without any moving parts. The detector core is temperature controlled to provide accurate irradiance measurement data within the spectral range from 300nm to 1100nm (UV-Visible-NIR).

MS-711 is accurately calibrated with traceability to the International Standards and issued with a calibration uncertainty budget. The rugged optical design of the diffusor and input optics make the MS concept superior to any fiber optic spectroradiometer which will be susceptible to mechanical vibration and handling. The MS spectroradiometers are designed for permanent installation, but are perfectly suited as a traveling reference.

  • Reference for spectral measurements UV-VIS-NIR
  • High optical resolution <7nm
  • Operating temperature range -10 to 50°C
  • Made for outdoor solar research
  • Robust design no moving parts
  • NIST Traceable calibration

Product Features

MS-711 has a separate power supply unit and can be controlled through RS232 / 422 by a PC or data logger. The PC software provides different functions for operating, data management and visualization. Through the open command protocol of the defined system control functions, software can be developed by the individual user. Measuring spectral irradiance is a must to understand the effect of the non-uniform energy distribution of the sun. Since the solar spectrum varies as a function of air-mass and composition of the atmosphere, the MS-711 reveals those details. While thermopile pyrheliometers and pyranometers are most suitable to quantify the total DNI or global radiation (W/m2), spectroradiometers give detail about the energy distribution (W/m2/nm), which is most important for PV or CPV cell research and performance analysis.

Main Features

1. All-Weather

MS-711/712 is designed based on our extensive experience in development, production and distribution of various kinds of meteorological instruments. MS-711/712 can be used for continuous outdoor use as all-weather equipment.

2. High Durability

Providing accurate spectral data over a long period of time requires a stable spectrometer and robust opto-mechanical concept. All parts used in the MS-711/712, such as dome, diffuser optics, grating and photo-diode array are designed without any moving parts.

3. Wide Measurement Range

With the automatic exposure function, MS-711/712 can measure a wide range of solar illumination from low to high illuminance in high S/N proportion. MS-711 can measure from 300nm to 1,100nm, MS-712 can measure from 900nm to 1,700nm wavelength range; combination of them will allow taking measurements which covers the wide range of wavelength from 300nm to 1,700nm.

4. Operating Software

The operating software has different measurement functions, to make either a “single measurement” or “scheduled measurement” which takes periodical measurements every day. Data as well as the details of the spectral data can be displayed simultaneously. It combines the data obtained from both MS-711 and MS-712, and takes re-samples and keeps the spectral data in every 1nm and automatically calculates the obtained data.

Technical Details

Wavelength range 300 – 1100 nm
Optical resolution FWHM < 7 nm
Wavelength accuracy +/- 0.2 nm
Directional response at 1000W/m² < 5 %
Temperature response -10°C to 50°C < 2 %
Temp. control 25 °C
Operating temperature range -10 – 50 °C
Exposure time 10 – 5000 msec
Dome material Quartz
Communication RS-422 / 232C
Power supply 12VDC, 50VA
Dimensions (mm) 220 (D) x 197 (H)
Weight 4.5 kg
Ingress protection IP 65
Power supply (Power Adapter) 100-240VAC, 50/60Hz
Power consumption 50 W
Power supply operating conditions -10 to 40°C / 0 to 90 %RH
Power suply dimensions (mm) 320 (W) x 240 (D) x 80 (H)
Power supply weight 1 kg
Program Analysis software WSDAc
OS Microsoft Windows  7/8/9/10
Functions Display and analyze data
Cable length 10 m
Field of View FOV 180 °


  • Measuring spectral irradiance
  • Spectral DNI Measurements