Many other spectroradiometers are sold by other manufactures, but those spectroradiometers were not welcomed so much because they had many points to be improved. Their measurement time was long, they are not all-weather type and their price was too expensive. So, EKO developed the Spectroradiometers, which enable all mentioned below.
- Short measurement time
- Continuous outdoor measurement
- Reasonable price

EKO Spectroradiometer line-up

Type	Spectralrange	Aperture angle	Model	Application
All-weather	VIS - NIR	180°	UV Grating Spectroradiometer MS-700	Observation/research of radiation/aerosols, investigation/research of vegetation/ocean color etc.
	UV	180°	UV Grating Spectroradiometer MS-701	Exposure test of building materials/paints, and the research of harmful influence of UV against human body.
Portable	VIS - NIR	180° / 90°	Portable Grating Spectororadiometer MS-720	Ground truth of satellite/airborne remote sensing data, Vegetation research, research of Clouds, Ocean and Geological features.
Indoor	VIS - NIR	30°	LS-100	Evaluation and research of the artificial light sources like the solar simulator.

MS-700
MS-700 is the all weather grating spectroradiometer for the continuous outdoor use. The spectral range of MS-700 is widely 350-1050nm, and attached software automatically calculate PAR(Photosynthetic Active Radiation, W/m²), Photon(µmol·m-2·s-1) and Lux(lux). MS-700 is appropriate for the observation/research of radiation/aerosols, investigation/research of vegetation/ocean color etc.

MS-701
MS-701 is the all weather grating spectroradiometer for the continuous outdoor use. The spectral range of MS-701 is 300-400nm, which cover the UV(Ultraviolet) range, and the attached software automatically calculate UV-A and UV-B. MS-701 is appropriate for the exposure test of building materials/paints, and the research of harmful influence of UV against human body.

MS-720

MS-720 is the portable grating spectroradiometer is powered by batteries, and stand-alone instruments having on-board LCD. Therefore, MS-720 is suitable for the outdoor field research of spectral radiation. The optional GPS unit enable to specify the precise location of MS-720. The internal memory of MS-720 save the obtained spectral data up to 800. MS-720 is suitable for the ground truth of satellite/airborne remote sensing data, and spectral measurement of the range from visible to near infrared radiation. Obtained data can be downloaded to PC through RS232C or USB, and processed there

- Portable - Selectable aperture angle - Stand-alone operation - On-board LCD - PC interface - Geographic location by optional GPS unit

LS-100
LS-100 is the portable spectroradiometer, which spectrometer and the detector part are connected through fiber optics. LS-100 is for the indoor use, LS-100 suitable for the evaluation of the artificial light source such as solar simulator, and various researches. LS-100 software has the automatic monitoring function of spectral match between the solar simulator and JIS provided value.

Calibration

The calibration of EKO Spectroradiometers are performed with comparing to the EKO Reference instrument under the natural sun light. EKO Reference instrument is NIST traceable

EKO Spectroradiometer

ZEISS MMS spectrometer is built in the EKO Spectroradiometer. This ZEISS spectrometer consists of the Grating and the Silicon photodiode (linear array sensor), and the optical parts are designed to be blocked out from the air. Therefore, the measurement time is only less than 5 seconds, and the measurement conditions hardly influence the measurement results.

Pyranometer and Spectroradiometer

Spectral measurement means the measurement of spectral irradiance (radio wave) emitted from the specified objects. Pyranometer measures the total solar irradiance in the wavelength of solar radiation, but the Spectroradiometer measures the solar irradiance of each wavelength of solar radiation.

Pyranometer measures the total solar irradiance according to the integration of the spectral irradiance curve. I=∫I(λ)dλ (W·m-2) (The blue part in the right graph)
Spectroradiometer measures the solar irradiance of each wavelength. I(λ) (W·m-2·µ·m-1) (The red line = Spectral irradiance curve)

Spectral data

Spectral data mean the solar irradiance of each wavelength, so those data can be used for the various data processing according to the necessary spectral range. For instance, you can calculate the integral value of UV-A/B and PAR in the specified range as well as the Photon and Lux based on the convolution integral value according to the specified action spectrum.