UV irradiance sensor
The SolarSIM-UV brings our SolarSIM technology to bear on the challenge of solar UV measurement. The result is a UV sensor like no other.
The SolarSIM-UV uses multi-spectral measurement to accurately resolve the solar spectral irradiance over the full UV range. From this, all the UV components are then precisely extracted.
|Measurands:||UV-Total, UV-A, UV-B, UV-E, UV index, PAR, GHI|
|Technology:||Software-augmented multi-filter radiometer.|
|Highlights:||All UV components from a single sensor. UV spectral and total irradiances.|
The only UV sensor you'll ever need.
Measuring solar UV irradiance is tough. The SolarSIM-UV rises to the challenge through the use of multi-spectral measurement. The result is a robust, accurate UV sensor unlike anything else.
The SolarSIM-UV uses filtered photodiodes to make precise, multi-spectral measurements of the solar spectrum in several narrow wavelength bands. These measurements then inform Spectrafy’s proprietary algorithms to accurately resolve the global solar spectrum within the UV range.
The SolarSIM-UV software then automatically integrates and processes the UV spectral irradiance to provide the full suite of UV parameters, including UV-T, UV-A, UV-B, UV-E and UV index. Because the UV components are obtained directly from spectral integrals, the limitations associated with traditional UV sensors , such as imperfect filter profiles and spectral selectivity are eliminated.
This innovative approach makes the SolarSIM-UV the first, and only sensor capable of resolving all UV components at the same time, thereby greatly simplifying the sensor count required for comprehensive UV monitoring.
Applications for the SolarSIM-UV include weather forecasting, VU reporting for public health, ground truthing of climate models, agricultural monitoring and material testing.
The SolarSIM-G can generate up to 20 high-quality data streams. Choose what you need:
|Global UV spectral irradiance||Solar spectral irradiance over the 280-400nm wavelength range, with 1nm resolution.|
|UV-A||Solar global irradiance within the wavelength range of 315 - 400nm.|
|UV-B||Solar global irradiance within the wavelength range of 280 - 315nm.|
|UV-T||Solar global irradiance within the wavelength range of 280 - 400nm.|
|UV-E||UV irradiance weighted to the response of human skin, per IEC 17166.|
|UV-Index||Based on UV-E, the international scale the quantifies the potential for UV irradiance to damage human skin.|
|Photosynthetically active radiation||Total irradiance within the 400-700nm wavelength range.|
|Meteorological parameters||Ambient temperature, relative humidity and atmospheric pressure.|
The SolarSIM-UV comes with powerful software to process and visualize your data.
Multiple options for maximum ease.
With RS-485 ASCII digital output, the SolarSIM-UV can connect to any RS-485 capable datalogger. Sample datalogger code is available upon request.
Get your SolarSIM-UV working straight out of the box with our custom power/comms converter. The Combox allows you to connect to and power a SolarSIM-UV directly through a laptop or PC.
Serial over ethernet
The SolarSIM-UV can be connected to a networked PC/server via a suitable SoE device. Hardware recommendations are available upon request.
|UV-Total||280 – 400 nm|
|UV-A||315 - 400 nm|
|UV-B||280 - 315 nm|
|UV-E||per IEC 17166|
|PAR||400 - 700 nm|
|GHI||280 - 4000 nm|
|Spectral response||n/a - measurements integrated from spectra|
|Response time (95%)||< 0.5 s|
|Cosine response||±3% at 80º zenith|
|Non-stability (change/year)||< 1.0 %|
|Non-linearity||< 0.5 %|
|Temperature response||< 0.1% (in-situ temperature correction)|
|Exposure time||< 1 ms|
|Max acquisition rate||0.5 Hz|
|Spectral range||280-400 nm|
|Spectral resolution (FWHM)||1 nm|
|Wavelength Accuracy||± 0.1nm|
|Spectral measurement uncertainty||< 5% per wavelength|
|Exposure time||< 1ms|
|Max acquisition rate||0.5 Hz|
|Temperature dependency||< 0.1% (on-board temp. correction)|
|Dimensions||132 x 132 x 110 mm|
|Power supply and use||12 VDC, <1W|
|Communication||RS-485 ASCII, Direct to PC, serial over ethernet, datalogger|
|Operating temperature range||-30 to 65 °C|
|Humidity Range||0 to 100% RH|
The only UV sensor you'll ever need.
|Public health||UV irradiance can significantly damage human skin, resulting in sun burn, premature ageing and even some forms of cancer. Widespread deployment of UV sensors help the public understand local UV conditions in real-time.|
|Agricultural monitoring||Ultraviolet light is known to have adverse effects on plants and animals. UV measurement networks allow industry an researchers to quantify and predict the effects of naturally occurring UV light on our food chains.|
|UV load monitoring for material testing||Accurately quantifying the UV exposure of new materials and coatings during outdoor testing provides important insights into their real world performance.|
How does the SolarSIM-UV work?
The SolarSIM-UV is a software augmented multi-filter radiometer. It uses filtered photodiodes to make precise, multi-spectral measurements of the solar spectrum in several narrow wavelength bands. These measurements then inform the SolarSIM-UV’s software to accurately resolve the complete global solar spectrum, under all sky conditions. From this detailed spectral irradiance, the SolarSIM-UV's software then automatically calculates the relevant UV components.
Why would I choose a SolarSIM-G over another UV sensor?
The SolarSIM-UV is the only UV sensor that resolves UV irradiance directly from spectral irradiance. This eliminates the spectral errors often inherent in other UV sensors, i.e. when the spectral response of the sensors does not exactly match the wavelength range of the desired UV measurand. In addition, the SolarSIM-UV's spectral measurement approach means that it is the only sensor capable of measuring all UV components at once, greatly reducing the capital and ongoing maintenance cost of comprehensive UV measurement.
What does the SolarSIM-UV software do?
The core of the SolarSIM-UV software is a proprietary radiative transfer model that uses the SolarSIM-UV's multi-spectral measurements of sunlight, along with its measurements of ambient temperature, pressure and humidity to reconstruct the global solar spectral irradiance over the 280-4000nm range. From this detailed spectral irradiance, the software then automatically calculates the relevant UV components. It is available as a GUI and as a command-line executable.
Does Spectrafy sell complete measurement systems?
Yes, we can provide you with a complete turn-key system so you can hit the ground running with your SolarSIM-UV measurements.
How do I connect a SolarSIM-UV to my datalogger?
The SolarSIM-UV communicates via RS-485 ASCII. As such it can connect to any datalogger that accepts RS-485 or RS-232 inputs. Sections 4 and 6 of the SolarSIM-UV User Manual provides details regarding data logger integration, as do our data logger app notes found in the SolarSIM-UV download section.
How is the SolarSIM-UV calibrated?
All SolarSIM-UV production units undergo electrical, thermal and optical calibration. The optical calibration is performed on-sun against our SolarSIM-UV reference sensors The reference sensors are calibrated for absolute irradiance at NREL in Golden Colorado and are traceable to NIST Spectral Irradiance Standard Model FEL lamps.
How often should I get my SolarSIM-UV recalibrated?
We recommend recalibration every year in order to ensure the highest measurement accuracy. Recalibration is performed on-sun, at Spectrafy HQ in Ottawa, Canada. Please contact us prior to shipping your unit in order to ensure the swiftest calibration process possible.
How does the process of upgrading my SolarSIM-UV to add additional measurement functions work?
The SolarSIM-UV can be purchased with any or all of its measurement capabilities activated. Additional measurement options can be added at any point in the future via a simple software upgrade. At the same time, users can also choose to have their historical data reprocessed, to include the new measurand(s) from inception.