Alongside the cooled AvaSpec-ULS2048x64TEC-EVO with a low-noise detector, Avantes also offers the uncooled AvaSpec-ULS2048x64-EVO. With its standard 2048×64 back-thinned detector, this spectrometer is perfect for less demanding applications in the UV and NIR ranges.

The cooling option is often unnecessary for applications that require integration times lower than 2 seconds. For example, this uncooled AvaSpec-ULS2048x64-EVO has an established track record in various DOAS(Differential optical absorption spectroscopy) applications worldwide because of its high UV response and 0.9mm detector height that enables detecting the wavelengths of interest. 

Options include an order-sorting filter to reduce second-order effects and purge ports for deep-UV measurements. The AvaSpec-ULS2048x64-EVO comes with a wide range of slit sizes and gratings and can be configured with SMA or FC/PC fiber-optic entrance connectors. 

The AvaSpec-ULS2048x64-EVO uses the AS-7010 electronics board offering USB3 (10 times faster than USB2), Gigabit Ethernet, and better signal processing. 

Connection to your PC is handled via USB3 connection or Ethernet, delivering a scan every two milliseconds. The instrument comes complete with AvaSoft-Basic software, a USB cable, and an extensive manual.

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Product Information

Optical bench Ultra-low stray light (ULS) symmetrical Czerny-Turner, 75 mm focal length
Wavelength range 200-1160 nm
Resolution 0.09-20 nm, depending on figuration
Stray light <1%, depending on grating
Sensitivity in counts/µW per ms integration time 650,000
Quantum efficiency @ peak 60% (200-300 nm)
Detector Back-thinned CCD image sensor 2048×64 pixels (height: 0.89 mm)
Signal/noise 450:1
AD converter 16 bit, 1.33 mHz
Integration time 2.4 ms-25 sec
Interface USB 3.0 high speed, 5 Gbps, Gigabit Ethernet 1 Gbps
Sample speed with store to RAM 2.44 ms/scan
Readout noise 7.5 cnts RMS
Dark noise 11.5 cnts RMS
Dynamic range 6100
Data transfer speed 2.44 ms/scan (USB3)
Digital IO HD-26 connector, 2 Analog in, 2 Analog out, 13 Digital bidirectional, trigger, sync., strobe, laser
Power supply Default USB power, 885 mA or external power supply 12 VDC, 420 mA
Dimensions, weight 175 x 127 x 44.5 mm, 1180 g
Use Useable range (nm) Spectral range (nm) Lines/mm Blaze (nm) Order code
UV/VIS/NIR 200-1160** 960** 300 300 UA
UV/VIS/NIR 200-1100** 900** 300 300/1000 UNA-DB
UV/VIS 200-850 520 600 300 UB
UV 200-750 250-220* 1200 250 UC
UV 200-650 165-145* 1800 250 UD
UV 200-580 115-70* 2400 250 UE
UV 200-400 70-45* 3600 300 UF
UV/VIS 250-850 520 600 400 BB
VIS/NIR 300-1160** 860** 300 500 VA
VIS 360-1000 500 600 500 VB
VIS 300-800 250-200* 1200 500 VC
VIS 350-750 145-100* 1800 500 VD
VIS 350-640 75-50* 2400 500 VE
NIR 500-1050 500 600 750 NB
NIR 500-1050 220-150* 1200 750 NC
NIR 600-1160 350-300 830 800 SI
NIR 600-1160** 560** 300 1000 IA
NIR 600-1160 500 600 1000 IB

*Depends on the starting wavelength of the grating; the higher the wavelength, the bigger the dispersion and the smaller the range to select. **Please note that not all 2048 pixels will be used for the useable range.

Slit size (µm) 10 25 50 100 200 500
FWHM in nm
300 lines/mm grating 1.40 1.50 2.5 4.8 9.2 21.3
600 lines/mm grating 0.70-0.80** 0.75-0.85* 1.2 2.4 4.6 10.8
830 lines/mm grating 0.42-0.48* 0.50-0.58* 0.93 1.7 3.4 8.5
1200 lines/mm grating 0.25-0.31* 0.37-0.43* 0.52-0.66* 1.1 2.3 5.4
1800 lines/mm grating 0.17-0.21* 0.26-0.32* 0.34-0.42* 0.8 1.6 3.6
2400 lines/mm grating 0.12-0.18* 0.18-0.24* 0.26-0.34* 0.44-0.64* 1.1 2.7
3600 lines/mm grating 0.09-0.12* 0.11-0.15* 0.19 0.4 0.8 1.8

*Depends on the starting wavelength of the grating; the higher the wavelength, the bigger the dispersion and the smaller the range to select

AvaSpec-ULS2048x64-EVO Ultra-low stray light fiber-optic spectrometer, 75 mm AvaBench, 2048×64 pixel back-thinned CCD detector, USB powered, high-speed USB3 and ETH interface, incl. AvaSoft-Basic, USB interface cable.nSpecify grating, wavelength range and options
PS-12V/2.08A External power supply, needed for use in ETH mode
-RS Replaceable slit
DCL-UV/VIS-200 Detector collection Lens to enhance sensitivity, Quartz, 200-1100nm
SLIT-XX Slit size, please specify XX = 10, 25, 50, 100, 200, 500 µm
SLIT-XX-RS Replaceable slit with SMA connector, specificy slit size XX=25, 50, 100, 200 or 500 µm. Only in combination with AvaSpec-ULS2048CL-EVO-RS
SLIT-XX-RS-FCPC As SLIT-XX-RS, but with FC/PC connector
OSF-YYY-3 Order sorting filter for reduction of 2nd order effects, 3 mm thick, please specify YYY= 305, 385, 475, 515, 550, 600 nm
OSC Order sorting coating with 600 nm long pass filter for BB (>350nm) and VB gratings
OSC-UA Order sorting coating with 350 and 600 nm linear variable filter for UA and VA gratings
OSC-UB Order sorting coating with 350 and 600 nm longpass filter for UB or BB (<350nm) gratings
-FCPC FC/PC fiber-optic connector

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