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Model EPP or ISA Wavelength range Resolution g/mm Grating
2000C-UV+VIS* 200-850nm 0.75nm 590, holographic-concave
2000- UV 200-600nm r1 1200, holographic-plane
2000- UV2 200-400nm r4 2400, holographic-plane
2000- UV3 220-350nm r5 3600, holographic-plane
2000- VIS 350-1150nm r2 600, ruled-plane
2000- NIR 500-1100nm r2 600, ruled-plane
2000- NIR2 600-1000nm r1 1100, holographic-plane
2000- NIR2b 785-1200nm r1 1200, ruled-plane
2000- NIR3 550-840nm r3 1800, holographic-plane
2000- NIR3b 680-935nm r3 1800, holographic-plane
2000- NIR4 500-700nm r4 2400, holographic-plane
2000- NIR4b 600-800nm r4 2400, holographic-plane
2000- XNIR2 1200-1600nm r1 1200, holographic-plane
* Not available in ISA2000. UV and XNIR2 models require UDET/XDET detector upgrade.
CUSTOM RANGES and Higher Resolution models AVAILABLE, contact factory for details.
Use the following resolution table only as a guide, actual resolution is much better. To figure
actual resolution, divide the range by number of detector pixels and multiply by blurr factor (2.5
for a 25um slit). Example: VIS = 800/2048 * 2.5 = 0.97nm
Slit size (microns) r1-resolution r2-resolution r3-resolution r4-resolution
10um 0.50 1.40 0.35 0.25
25um 1.20 2.50 0.70 0.50
50um 2.40 5.00 1.40 1.00
100um 5.00 10.0 2.80 2.00
200um 10.0 20.0 5.60 4.00
The slit is permanently installed in the fiber optic connector. It allows the instrument to maintain
resolution when different sizes of fiber optic cables are connected. If you plan to use only single
mode fibers 8um or smaller, then a slit is not needed. Most spectroscopy applications do
require a slit. Resolution indicates the instrument’s ability to resolve adjacent peaks at FWHM
(full width half max) separated by “resolution” wavelengths.
The current spectrometer models use 2048 element CCD (Charge Coupled Device) or PDA
(Photo Diode Array) detectors, or NIR 512 or 1024 element InGaAs detectors. Detector
specifications for your spectrometer model are available on our web site. Sensitivity for these
devices is extremely high and range from 100 to 200 V/(lx * s) as found in the detector
manufacturer’s specs (i.e.: Sony/ Toshiba/ Hamamatsu). The most common detector is an array
of 2048 cells of 14um x 200um tall elements each with a 14um pitch. The NIR InGaAs
detector pixels are 25um x 500um tall elements with a 25um pitch.
The SpectraWiz software provides for detector integration time selections down to 1ms (for
LT14 electronics) or 2ms (for LT12) or 4ms (for standard electronics). This is equivalent to
A2D (Analog to Digital) data acquisition rates of 2 / 1 / 0.5 MHz down (and slower). The
LT12 and standard A2D converter is 12 bit and therefore has a dynamic range of 1 to 4096
counts (+/- 0.5). LT14 is 14 bit with 1 to 16384 counts.
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