The StellarNet EPP3000 fiber-optic UV+VIS spectrophotometer is a high performance instrument designed for use in either a laboratory or process environment. Its excellent sensitivity and flexible exposure times make it useful for high light absorbance/transmission measurements and low light applications such as fluorescence. The 64 (verticle) x 1024 element detector is a wide dynamic range CCD, cooled by a single-stage thermoelectric cooler. Each element is a 24 x 24um pixel. The first 400 pixel-columns are lumogen coated for UV response. A holographic flat-field grating is employed for wavelength coverage of 190-790 nm.

UV/VIS Spectrometers StellarNet provides both low cost and research grade UV/VIS spectrometers for routine and at line process measurement of sample absorbance, transmittance, and reflectance. The spectrometer wavelength range covers 200-850nm or 190-790nm depending on the model selected. The units incorporate UV enhanced CCD detectors with multi band coatings to minimize second order wavelength detection. 25um slits are permanently installed to set resolution at 0.75nm across their UV+VIS operating range. The optics incorporate a 40mm diameter concave grating that produces an aberration corrected, flat field onto the detector. Without mirrors, the grating provides superb image quality and maintains low stray light. The EPP2000C spectrometer model can be daisy-chained to allow DUAL BEAM configurations as well as other multi-channel configurations for process monitoring. Photo Diode Array detector options are available to increase the signal to noise for demanding UV/VIS applications. The instruments are constructed in a small metal enclosure of 6x4.25x2.75 inches, with a fiber optic SMA connection on the front panel. The unit connects digitally to a printer connector on a PC or notebook computer. The units have an integrated data digitizer with a 4096magnitude for any detector integration period. The detector can be selected to integrate from 4 milliseconds right up to 60 seconds, extending the detection limits for small signals. The units provide 7 decades of dynamic range. A decade of dynamic range includes the selected integration period * 2. Portable spectrometers include IEEE1284 interface cable and +5VDC power adapter for 120VAC-60HZ. Light sources include +12VDC power adapter for 120VAC-60HZ. These power adapters are small wall mount transformers with U.S. style 2 prong plugs. For usage outside the U.S.A., we offer an upgrade to universal power adapters. Connecting the spectrometer to a second EPP printer port on your computer is most convenient and recommended. For portable notebook computers that don't have an EPP capable printer port, we offer the PCMCIA card style EPP interface. The EPP3000C model provides 8 fiber optic inputs, stacked in a line, that are focused onto the concave grating through a 25um slit. The cooled Hamamatsu CCD detector receives the "stacked" image, and with the help of an integrated DSP (digital signal processor), separates the optical image into discrete spectral channels. The unit has an integrated 16 bit A2D data digitizer with correlated double sampling to provide a signal to noise of 20,000:1 with a dynamic range of 50,000. The unit is provided in a metal enclosure with 8 fiber optic SMA input connectors, 100-240VAC power input (47-63Hz), IEEE1284 interface cable and EPP-PCI adapter card. The unit is capable of reading 10 samples per second on all 8 channels.