The AvaSpec-128 Fiber Optic Spectrometer is the replacement of the AvaSpec-102 and based on the AvaBench-45 symmetrical Czerny-Turner design with 128 pixel Photo Diode Array. The spectrometer has a fiber optic entrance connector (standard SMA, others possible), collimating and focusing mirror and diffractional grating. A choice of 11 different gratings with different dispersion and blaze angles enable applications in the 360-1100nm range. The AvaSpec-128 can be delivered with 2 platforms of electronics; either with USB1.1 with 14 bit AD converter or the new USB2.0 interface with 16 bit AD converter. Applications for this instrument are low cost color measurements. Digital IO ports enable external triggering and control of shutter and pulsed light sources from the Avantes line of instruments.
The AvaSpec-128 is also available as dual channel or multiple channel instrument (up to 8 channels), where all spectra are taken simultaneously.
The AvaSpec-128 comes with AvaSoft-basic, a complete manual, USB interface cable and a PS-12V/1.0A power supply. AvaSoft-full and application software can be ordered separately.
Alternatively the AvaSpec-128-SPU has a switch to run on USB power or external power.
The new AvaSpec128-USB2 has a USB2 interface with ultrafast datasampling of 8000 spectra per second (with on board averaging) and datatransfer in 1.1msec and supports analog in-and outputs as well. Optional Bluetooth ® (-BT) communication and an SD card for on-board saving of spectra can be added. The AvaSpec-128-USB2 runs on USB power and comes with AvaSoft-basic, a complete manual and USB interface cable. Multiple (up to 127) USB2 spectrometers with different detectors can be externally coupled (see section multi-channel spectrometers).
Technical Data
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Spectrometer platform
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AvaSpec-128
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AvaSpec-128-USB2
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Optical Bench
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Symmetrical Czerny-Turner, 45 mm focal length
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Wavelength range
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360-1100 nm
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Resolution
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1.2 -64 nm, depending on configuration (see table)
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Stray light
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< 0.3%
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Sensitivity (AvaLight-HAL, 8 µm fiber) in counts/µW per ms integration time
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1000 (14-bit AD)
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4000 (16-bit AD)
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Detector
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Photo diode array, 128 pixels
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Signal/Noise
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500:1
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AD converter
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14 bit, 1.33 MHz
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16 bit, 2 MHz
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Integration time
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1 msec - 60 sec
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0.06 msec - 10 minutes
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Interface
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USB 1.1, 12 Mbps
RS-232, 115.200 bps
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USB 2.0 high speed, 480 Mbps RS-232, 115.200 bps
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Sample speed with on-board averaging
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3 msec
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0.12 msec
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Data transfer speed
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6-7 ms / scan (depending on # pixels transferred)
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1.1 msec / scan
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Digital IO
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DB-15 connector, 2 Digital in, 12 Digital out
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HD-26 connector, 2 Analog in, 2 Analog out, 3 Digital in, 12 Digital out, trigger, sync.
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Power supply
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12 VDC, reverse polarity protection ,160 mA (PS-12V/1.0A) or 5VDC USB power
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Default USB power, 350 mA
Or with SPU2 external 12VDC, 350 mA
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Dimensions, weight
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175 x 110 x 44 mm(1 channel), 716 grams
175 x 165 x 85 mm (2 channel), 1.700 grams
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175 x 110 x 44 mm(1 channel), 716 grams
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Grating selection table for AvaSpec-128
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Useable range
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Spectral range (nm)
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Lines/mm
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Blaze (nm)
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Order code
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VIS/NIR
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360-1100
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500
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300
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300
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UA
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VIS
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360-750
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100
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1200
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250
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UC
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VIS
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360-850
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240
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600
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400
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BB
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VIS/NIR
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360-1100*
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740*
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150
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500
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VZ
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VIS/NIR
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360-1100
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500
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300
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500
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VA
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VIS
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360-850
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240
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600
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500
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VB
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VIS
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400-980
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100
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1200
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500
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VC
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NIR
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500-935
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240
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600
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750
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NB
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NIR
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500-1000
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100
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1200
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750
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NC
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NIR
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600-1100
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500
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300
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1000
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IA
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NIR
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600-1100
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200
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600
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1000
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IB
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* please note that not all 128 pixels will be used for the useable range
Resolution table (FWHM) for AvaSpec-128
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Slit size (µm)
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Grating (lines/mm)
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50
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100
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200
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500
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150
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13.0
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13.0
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26.0
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64.0
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300
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6.4
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6.4
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13.0
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32.0
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600
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3.0
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3.0
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6.0
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16.0
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1200
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1.5
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1.5
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3.0
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8.0
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Ordering Information
| AvaSpec-128 |
Fiber Optic Spectrometer, 45 mm Avabench, 128 pixel PDA detector, USB1.1/RS-232 interface, incl AvaSoft-Basic, USB interface cable and a PS-12V/1.0A power supply, specify grating, wavelength range and options |
| AvaSpec-128-USB2 |
Fiber Optic Spectrometer, 45 mm Avabench, 128 pixel PDA detector, USB powered high speed USB2 interface, incl AvaSoft-Basic, USB interface cable, specify grating, wavelength range and options |
| AvaSpec-128-2 |
Dual Channel Fiber Optic Spectrometer, 2 * 45 mm Avabench, 128 pixel PDA detector, USB1.1/RS-232 interface, incl AvaSoft-Basic, USB interface cable and a PS-12V/1.0A power supply, for both channels specify grating, wavelength range and options |
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| Options |
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| -SPU |
incl. switch for USB powered USB1 or external power for RS232 |
| -SPU2 |
incl. switch for USB powered USB2 or external power for RS232/BT |
| -SPU2-BT |
Bluetooth® interface for USB2 platform only, including antenna and switch |
| SDXXX |
Internal XXX MB SD card for on board data saving, for USB2 platform only |
| DCL-VIS |
Detector collection lens to enhance sensitivity, PMMA, 360-1100nm |
| SLIT-XX |
Slit size, please specify XX = 50, 100, 200, 500 µm |
| OSF-YYY |
Order sorting filter for 2nd order effects filtering, please specify YYY= 385, 475, 515, 550, 600 nm |
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