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This Product is discontinued, please refer to the Alternatives shown below under Similar Products or contact us directly.

Alternative Products for this discontinued product:

 BTS2048-UV-S
Measure in the UV with this high-quality compact spectroradiometer

BTS2048-UV-S-WP

Spectroradiometer ideal for high precision outdoor UV measurements

  • Compact spectroradiometer ideal for high precision outdoor UV measurements
  • High stray light reduction comparable to double monochromator
  • UV index and UV spectral irradiance
  • Weatherproof housing with temperature control
  • Heated airflow to keep the entrance optics clean and dry
BTS2048-UV-S-WP

BTS2048-UV-S-WP BiTec sensor spectroradiometer for high-quality outdoor UV measurements

The BTS2048-UV-S-WP is a high-quality spectroradiometer whose compact design and elaborate optical, electronic and mechanical interfaces make it ideal for high precision outdoor UV measurements. Due to its innovative filter and spectrometer design it is able to measure solar radiation with a very good straylight reduction performance. Accordingly, even the edge of the sun below 300 nm can be resolved for some orders of magnitude (see figure 2). With the included S-BTS2048 application software, precise measurements and data analysis (Erythema, ICNRIP, etc.) can be performed intuitively. In addition, the spectral range can be extended from the UV to the NIR with the complementary BTS2048-VL-TEC-WP. Applications in the whole Si spectral region (e.g. solar-cells) are possible.


BiTec sensor for high-end light measurement 

One of the outstanding features of this exceptional spectroradiometer is its BiTec sensor (see technical article about BiTec sensor). It combines the special properties of a photodiode with those of a back-thinned CCD diode array. Through bilateral correction of measurement signals from both sensors, the BiTec sensor ensures precise radiometric and spectral-radiometric measurement values over a large dynamic range.


Spectrometer based on a high-quality back-thinned CCD detector 

The spectrometer unit is based on a CCD with usable spectral responsivity range between 190 nm and 430 nm. It has a 0.7 nm optical bandwidth and a pixel resolution of 0.13 nm/pixel. Due to the back-thinned technology, the CCD is substantially more sensitive as compared to conventional front-illuminated CCD chips. Furthermore, the CCD is one stage cooled (1TEC) to reduce the dark current and and thereby increase the signal to noise ratio.


Precise spectral radiometry (low straylight)

To facilitate optimum use of the CCD sensor‘s dynamic range and to overcome the problems of most array spectoradiometers in the UV range, a remote-controlled filter wheel (open, closed, optical filters) is located in the optical beam path. This filters combined with smart measurement and stray light correction routines enables high quality measurements of the BTS2048-UV-S. Results are comparable with double monochromator results (see figure). However, the measurement duration is significantly lower. Since the BTS2048-UV-S contains a filter wheel with 8 filter positions, a further smart measurement routine for stray light reduction is implemented compared to the BTS2048-UV. See also our technical article about stray light reduction for spectroradiometers. In addition we have achieved very good results for the BTS2048-UV-S-WP in a scientific intercomparison with double monochromator.


WP means weather proofed

The housing of the BTS2048-UV-S-WP is designed for outdoor measurements. The cooled back-thinned CCD and the spectrometer unit are temperature controlled in a second housing. In this housing, humidity is removed by an exchangeable cartridge. In order to avoid deposits of dust, rain or snow on the entrance optics on the entrance optics the quartz dome is blow-dried by warm air.


Diffuser window directly connected instead of light guide 

As for the input optics, the BTS2048-UV-S-WP has an incorporated diffuser window with a cosine corrected field of view. The fact that a light guide has not been used improves sensitivity and calibration stability which is a big advantage for outdoor use. The device‘s compact size is also of significant benefit. The f2 error of the cosine corrected field of view to less than 3% makes it possible to use the BTS2048-UV-S-WP for direct measurement in absolute radiometric quantities:

● Irradiance (W/m²)

● Spectral irradiance (W/(m² nm))


State of the art interface

The BTS2048-UV-S-WP is controlled via a USB 2.0 or Ethernet interface. With regards to the communication speed and cable length, the Ethernet port is superior to the USB2.0 interface. Furthermore, data preparation occurs in the BTS2048-UV-S-WP to optimize the data-transfer speed. For this purpose, an independent, high-performance microprocessor is incorporated. Data and power interface are of course of weather-proof design as well.


User software with flexible desktop structure 

The BTS2048-UV-S-WP‘s scope of delivery includes the S-BTS2048 user software. One of the characteristic features it has to offer is the flexible desktop that can be individually configured by the user.

This entails a potpourri of graphical and numerical display windows from which the user can choose:

● Freely definable numerical displays in decimal or scientific representation. Zoom function.

● Numerical display fields for radiometric, spectral and other measurands.

● Measurement protocol of the selected measurement parameters.

● Spectrum. Zoom function.

● Data logger. Zoom function.


Traceable calibration 

Calibration of the BTS2048-UV-S-WP, including its accessories, is performed by Gigahertz-Optik ISO/IEC 17025 calibration laboratory for optical measurands with reference to national and international calibration standards. Due to the small dimensions of the device it can be shipped easily for re-calibration purposes.


International Measurement Campaign

Additional to the above mentioned scientific campaign the BTS2048-UV-S-WP has took part in an international intercomparision (ATMOZ) in Tenerifa, to prove the quality of the measurement data in the scientific framework in TOC measurements.

 

Comparison of a solar measurement of the BTS2048-UV-S and a standard double monochromator. The BTS2048-UV-S achieves about the same quality in a measurement time of a few s compared to about 1.5 min of the double monochromator.

Comparison of a solar measurement of the BTS2048-UV-S and a standard double monochromator. The BTS2048-UV-S achieves about the same quality in a measurement time of a few s compared to about 1.5 min of the double monochromator.

Entrance optic is blow-dried by warm air to prevent dirt, rain or snow

Entrance optic is blow-dried by warm air to prevent dirt, rain or snow

Side View of the BTS2048-UV-S-WP

Side View of the BTS2048-UV-S-WP

 The WP version in a winter measurement campaign

The WP version in a winter measurement campaign

Similar Products

 BTS2048-UV-S
Measure in the UV with this high-quality compact spectroradiometer
BTS2048-UV
Measure in the UV with this high-quality compact spectroradiometer
BTS2048-VL-TEC-WP
Outdoor Spectroradiometer for Solar VIS measurements
BTS2048-IR-WP
Spectroradiometer ideal for high precision outdoor IR measurements
BTS2048 Series
Compact spectroradiometers with excellent optical performance and BiTec technology for precise measurements for lab and field use.