Long integration times in general are equivalent to higher dark noise. Avantes Thermo-Electric Cooled (TEC) spectro-meters systems overcome this problem by cooling the detector.
AvaSpec-ULS2048LTEC Fiber Optic Spectrometers
These recently re-designed instruments are equipped with triple stage cooling, keeping your detector at a optimal 5 degrees Celsius (maximum -35°C difference from ambient temperature).
The detector cooling provides a significantly lower and more stable dark baseline and PRNU level. Dark noise is reduced by a factor of 2-3. This allows the ULS2048LTEC to be used in very low light conditions, such as fluorescence and Raman measurements. If needed, integration times of more than 5 seconds are possible.
The AvaSpec-ULS2048LTEC has an integrated temperature regulator, USB2.0 high-speed interface and two cooling fans to actively ventilate the heat sink of the Peltier cooling elements. The spectrometer power supply is integrated into the housing. The Replaceable Slit option is now also available for this spectrometer!
|Optical Bench||ULS Symmetrical Czerny-Turner, 75 mm focal length|
|Wavelength range||200-1100 nm|
|Resolution||0.06-20 nm, depending on configuration (see table)|
|Stray-light||0.04-0.1%, depending on the grating|
|Sensitivity||470,000 counts/µW per ms integration time|
|Detector||CCD linear array, 2048 pixels|
|Temperature cooled CCD||Max. ΔT = -35°C versus ambient|
|Time to stabilize|
|Dark baseline improvement @ΔT=-35°C and it > 5 sec|
> Factor 6
|PRNU improvement @ΔT=-35°C and it > 5 sec||>Factor 8|
|3 stage Peltier cooling internal Power supply@ΔT=-35°|
|AD converter||16 bit, 2 MHz|
|Integration time||1.11 ms – 10 minutes|
|Interface||USB 2.0 high speed, 480 Mbps|
RS-232, 115.200 bps
|Sample speed with on-board averaging||1.1 ms /scan|
|Data transfer speed||1.8 ms /scan (USB2)|
430 ms / scan (RS-232)
|Digital IO||HD-26 connector, 2 Analog in, 2 Analog out, 3 Digital in, 12 Digital out, trigger, sync.|
|Power supply||100-240VAC, 50W|
|Dimensions, weight||250 x 179 x 144 mm, 3.6 kg|
|AvaSpec-ULS2048LTEC-USB2||Thermo-Electric Cooled Fiber-optic Spectrometer, 75 mm Ultra-Low Stray-light AvaBench, 2048L pixel 3-stage TE-cooled and regulated CCD detector, USB2 high-speed interface, incl. AvaSoft-Basic, USB cable, desktop housing.|
Specify grating, wavelength range and options