UV Index Measurement
- Photodiodes for measurement of the UV Index, various optics and detector chip areas
- UV sensors (TOCONs) with 0 to 5 V voltage output for measurement of the UV Index, various optics
- UV sensor probes for measurement of the UV Index, cosine field of view
- Measurement uncertainty of these sensors is 5% only, spectral response curve and the field of view (cosine type) in near perfect accordance with the requirements defined in the ISO 17166 standard
- Display devices with graphic touch screen and logging function
- Microcomputer based UV Index measurement station with network connection
Definition of the UV Index
The UV Index is defined by ISO 17166 and quantifies the risk of sunburn (Erythema Solare) at a given solar UV exposure spectrum. Please check the video below for further information.
Approaches to measure the UV Index
Precise measurement of the UV Index is usually based on data generated by spectrometers. These spectrometers measure the ultraviolet spectrum of the sun. Subsequently the UV Index is calculated by multiplication and integration of this spectrum with the human skin’s erythema action curve. A handy alternative to spectrometer based UV Index measurement is using radiometers such as photodiode based integrating sensors. This method requires precision matching of the photodiode’s spectral responsivity with the erythema action curve of the human skin and a cosine field of view. This precision is needed because the spectrum of the source (the sun) varies strongly depending on time of day, place, date, clouds, shadow and the local ozone layer thickness. A radiometer sold as an “UV Index Sensor” that does not precisely match the erythema action curve is not a valid UV Index Sensor, it is just a UV Sensor. As a result of many years of R&D the sglux ERYCA UV Index sensors nearly perfectly match the erythemal action curve.
sglux ERYCA radiometer based global meteorological network
Since 2014 Berlin’s first UV Index measuring station works on the roof of sglux’s building. This station bases on a UV Index sensor probe (“UV-Cosine_UV-Index”) and a LAN transmitter module (“SKYLINK UV-transmitter”). Since October 2015 a duplicate station works in the Southern hemisphere, in Florianopolis, a city in the South of Brasil. Below the values of these two stations are displayed.
Todays value in Adlershof
Yesterdays value in Adlershof
Todays value in Florianópolis
Yesterdays value in Florianópolis
Our components and systems for measurement of the UV Index are listed below. It starts with a selection of UV-Index photodiodes (external amplifier needed). Easiest to use components are the UV-Index TOCONs (photodiodes with internal amplifier for 0 to 5 V voltage output). The sglux UV-Cosine_UV-Index probe is a waterproof sensor ready-to-mount outdoors with cosine field of view. To display and control the sensor’s signal sglux offers the UVTOUCH and UV Control Pad displays as well as datalogger units. Our “SYKLINK UV transmitter” unit converts the sensor’s signal into a web graph and transmits this graph to one or more multiple webpages. All items will be delivered calibrated (PTB traceable) on request.
Contact sglux and discover your opportunities to precisely detect and report the sun’s UV-Index.
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UV-Index photodiode SG01L-E5DUV-Index measurement, SiC UV photodiode, erythema filter, chip active area = 1.00 mm², TO5 housing with cosine correction
UV-Index photodiode SG01L-E5UV-Index measurement, SiC UV photodiode, erythema filter, chip active area = 1.00 mm², TO5 housing
UV-Index sensor TOCON_E2UV-Index measurement, SiC UV sensor, integrated amplifier, signal output 0-5 V, with erythema filter, measurements up to 30 UVI, TO5 housing with diffusor
UV-Index sensor TOCON_UVIUV-Index measurement, TOCON_E2 (SiC UV-Index sensor) in a PTFE housing, with G1/4" thread, water proof, EMC safe, with erythema filter and measurements up to 30 UVI
UV-Index sensor probe UV-Surface_UVIUV-Index measurement, UV sensor probe, EMC safe, with cosine FOV and erythema filter
UV-Index sensor probe UV-Cosine_UVIUV-Index measurement, UV sensor probe, water proof, EMC safe, with cosine FOV and erythema filter
UV-Index reference radiometer with UVI sensor probeUV-Index measurement, reference radiometer with UVI sensor probe, incl. calibration
Skylink UV transmitterUV-Index measurement station, incl. UV sensor probe, network computer