This Product is discontinued, please refer to the Alternatives shown below under Similar Products or contact us directly.
Alternative Products for this discontinued product:
Hand-held spectral circadian light meter
- Over 30 different measured variables as well as especially the circadian evaluation
- Circadian measured values directly on the touch screen
- Excellent cosine sensitivity (f2) and large measuring range
- Plug & Play connection via USB including software
The circadian phototransduction process
Circadian phototransduction is the process that converts optical radiation incident on the retina into neuronal signals that reach the suprachiasmatic nucleus (SCN). The mechanism of circadian phototransduction can be viewed as a unique neuronal circuit in the retina with spectral sensitivity to optical radiation and a characteristic response to varying amounts of this optical radiation. Therefore, measurement of optical radiation and evaluation of it according to circadian effects is important.
According to Rea et al, modeling circadian phototransduction in humans requires a systematic and convergent approach to understand how a retinal circuit might perform this transformation.
Such a model was developed by the team and implemented in the MSC15-CS.
Circadian model implementation
The MSC15-CS is a spectral-measuring luxmeter which, in addition to all the features of the established MSC15 spectral light meter, additionally contains the circadian assessments according to:
Modeling Circadian Phototransduction: Quantitative Predictions of Psychophysical Data. By Rea, M. S., Nagare, R., and Figueiro, M. G. (2021). Front. Neurosci. 15:615322. doi: 10.3389/fnins.2021.615322
and the correction:
Corrigendum: Modeling Circadian Phototransduction: Quantitative Predictions of Psychophysical Data. by Rea, M. S., Nagare, R., and Figueiro, M. G. (2021). Front. Neurosci. 15:615322. doi: 10.3389/fnins.2022.849800
The MSC15-CS - Compact spectral measuring circadian meter.
With the MSC15-CS Gigahertz-Optik GmbH has developed a spectral measuring light meter in the special version -CS which allows the circadian evaluation of light sources directly on site. The evaluated measurement results are displayed directly on the touch screen. A control by means of the supplied software and display of the measured values in this is also possible.
Technically, the instrument corresponds to the established MSC15 spectral light meter with its high accuracy, a spectral range from 360 nm to 830 nm, a low calibration uncertainty and accurate characterizations and corrections like non-linearity as well as bandwidth effects, etc.
Calibration of the MSC15-CS Circadian Light Meter
One essential quality feature of photometric devices is their precise and traceable calibration. The MSC15-CS is calibrated by Gigahertz-Optik’s calibration laboratory that is accredited by DAkkS (D-K-15047-01-00) for the spectral responsivity and spectral irradiance according to ISO/IEC 17025. Every device is supplied with its respective calibration certificate.
In addition to the free user software, the software development kit is also available for users to integrate the meter into their own software.
MSC15-CS for measurement of circadian stimulus, illuminance, spectrum and color
Circadian Display on MSC15-CS
Display of photopic lux, CCT and CRI Ra
Display of the spectral power distribution, photopic lux and CCT
Example measurement in the MSC15's software