Spectro-radiometer datalogger – HD30.1

The spectro-radiometer datalogger is an instrument designed for the spectral analysis of light in the visible and ultraviolet ranges. It is intended not only to measure the quantity of light emitted by a source, but also to analyse its spectral distribution together with the related photometric, colorimetric and radiometric parameters.

The system consists of a datalogger display unit with colour touchscreen and interchangeable measurement sensors connected by cable. This configuration allows the user to select the most suitable sensor for the spectral range to be analysed: one for the visible range 380…780 nm and another for the ultraviolet range 220…400 nm. Each sensor stores its own calibration file internally, ensuring correct matching between the probe used and the acquired measurement data.

With the sensor dedicated to the visible range, the instrument can analyse light sources by evaluating parameters such as illuminance, correlated colour temperature CCT, CIE chromaticity coordinates, CRI colour rendering index and PAR. It is therefore suitable whenever light quality characterisation is required, for example in museums, controlled environments, technical lighting systems, indoor cultivation and applications where the spectral composition of the light source directly affects the final result.

Using the ultraviolet sensor, the instrument can evaluate spectral irradiance together with UVA, UVB and UVC irradiance. This configuration is particularly suitable for checks on UV sources used in sterilisation, disinfection, phototherapy, technical treatments, industrial processes and applications where it is important to distinguish between the different components of ultraviolet radiation.

The input optics with opal quartz diffuser contribute to cosine-law correction, while the measurement principle based on a transmission diffraction grating allows the acquisition of the source spectrum and the calculation of derived parameters. The instrument can operate in different modes: single acquisition, continuous acquisition with data storage, continuous monitoring without storage and programmed interval logging.

Internal memory, together with the possibility of using micro SD cards or USB flash drives and PC connection via Ethernet or mini USB, makes the instrument suitable both for immediate checks and documented measurement campaigns. Exported data are compatible with the main management and analysis software platforms, simplifying post-processing and reporting activities.

Compared to a traditional luxmeter or radiometer, this instrument is intended for applications where measuring a single value is not sufficient and it is necessary to understand how radiation is distributed across the spectrum. It is therefore a more advanced solution for evaluating light quality, colour rendering, PAR exposure and UV components with an analytical and fully documentable approach.

Applications

• Spectral analysis of light in the visible and ultraviolet ranges
• Light quality control in museums, laboratories, technical environments and lighting systems
• Evaluation of illuminance, CCT, chromaticity coordinates, CRI and PAR
• PAR measurements for agriculture, indoor cultivation, horticulture and plant growth applications
• Control of UV sources for sterilisation, disinfection and technical processes
• Verification of UVA, UVB and UVC sources in industrial, healthcare and laboratory environments
• Analysis of lamps for dermatological phototherapy and UV-based medical treatments
• Control of blue light sources used in technical applications and neonatal therapies
• Single acquisition, continuous monitoring and programmed interval logging
• Data export for analysis, archiving and technical documentation

FAQ – Spectro-radiometer datalogger

What is a spectro-radiometer datalogger used for?
It is used to analyse the spectral distribution of light and calculate photometric, colorimetric and radiometric quantities. It is particularly useful when measuring only lux or W/m² values is not enough and the spectral composition of the light source must also be evaluated.

When should this instrument be selected instead of a luxmeter?
A luxmeter measures illuminance, while a spectro-radiometer analyses the source spectrum and provides information such as CCT, chromaticity coordinates, CRI and PAR. It is therefore more suitable whenever light quality, and not only intensity, must be evaluated.

Can the instrument also measure ultraviolet radiation?
Yes, by using the dedicated ultraviolet sensor it is possible to analyse the 220…400 nm band and calculate UVA, UVB and UVC irradiance.

Which quantities can be measured in the visible range?
In the visible range the instrument can evaluate illuminance, correlated colour temperature CCT, CIE chromaticity coordinates, CRI colour rendering index and PAR.

What is PAR measurement used for?
PAR measurement concerns photosynthetically active radiation and is useful for evaluating light sources used in agriculture, indoor cultivation, plant research and applications where light affects photosynthetic processes.

Why is CRI important?
CRI indicates the ability of a light source to reproduce colours correctly compared to a reference source. It is an important parameter in museums, exhibition environments, laboratories, visual quality control and applications where colour perception must be accurately controlled.

Are the sensors interchangeable?
Yes, the system uses interchangeable sensors according to the spectral range to be measured. Each sensor stores its own calibration file internally to maintain correct matching between probe and measurement data.

Which measurement modes are available?
The instrument can operate in single acquisition mode, continuous acquisition with storage, continuous monitoring without storage and programmed interval logging. This flexibility allows the instrument to adapt both to quick checks and structured monitoring campaigns.

Can data be saved and exported?
Yes, data can be stored internally and managed using micro SD cards or USB flash drives. The instrument can also be connected to a PC via Ethernet or mini USB.

In which cases is the instrument useful for museum applications?
It is useful for evaluating the spectrum of installed light sources, checking light quality on displayed objects and identifying spectral components that may contribute to the degradation of sensitive materials, such as certain blue or ultraviolet emissions.