Advanced Spectroscopy with CHEM Systems

The CHEMUSB4-VIS/NIR

The CHEMUSB4-VIS/NIR packages a high-tech built-in light source, a USB4000 Spectrometer, a holder for 1-cm cuvettes, and high-speed electronics into a small-footprint system. The CHEMUSB4-VIS-NIR provides real-time, PC-based spectroscopy and captures full spectra from 370 to 985 nm in only 25 milliseconds.

Features

  • Fully integrated, preconfigured system covers the 370 to 985 nm range at 1.0 nm (FWHM)

  • See changes as small as 0.1 Absorbance Units

  • Small-footprint system ideal for the laboratory and the classroom

  • Direct-attach deuterium tungsten/violet LED light source and sample holder

  • USB 2.0 interface for fast, hassle-free spectrometer-to-PC connection

Direct-attach Light Source & Programmable Microcontroller

The CHEMUSB4-VIS/NIR uses a combination sample holder (1-cm cuvette) and violet LED-boosted tungsten light source for measuring relative absorbance. The light source boosts signal in the blue and provides over 45,000 hours of use. This system also features an onboard programmable microcontroller that provides you with considerable flexibility in controlling the spectrometer and accessories. Through a 22-pin connector, you can implement all operating parameters in the software: control light sources, create processes, and retrieve information on external objects. You have access to 8 user-programmable digital Inputs/Outputs for interfacing to other equipment. (Contact Dr. Q regarding what you'll need to program the GPIOs.)

Operation & Specifications

The CHEMUSB4-VIS/NIR interfaces to a PC, PLC or other embedded controllers via USB 2.0 or RS-232 serial port. When using the serial port, the system requires a single 5-volt power supply (not included). Data is programmed uniquely into each spectrometer, and the operating software reads these values for easy setup and hot swapping among PCs.

Note: Use of the serial port, requires a single 5-volt power supply (not included). Also, SpectraSuite does not support spectrometer operation via the serial port. Users can use the Serial Command set to write your own software that makes serial port operation possible.
Spectrometer dimensions Spectrometer weight   Optical resolution Dark noise
89.1 mm x 63.3 mm x 34.4 mm 190 grams   1.0 nm FWHM 50 RMS counts
Light source dimensions Light source weight   Integration time Dynamic range
40.7 mm x 88.8 mm x 34.1 mm 130 g   3.8 ms to 10 seconds 2 x 108 (system), 1300:1 for a single acquisition
Detector Pixels   Stray light Operating systems
Toshiba TCD1304AP Linear CCD array 3648 pixels   <0.05% at 600 nm; 0.10% at 435 nm Windows 98/Me/2000/XP
Mac OS X
Linux with USB port
Pixel size Signal-to-noise   Peripheral interfaces Computer interface
8 μm x 200 μm 300:1 (at full signal)   SPI (3-wire); I2C inter-integrated circuit USB 2.0 @ 480 Mbps (USB1.1 compatible); RS-232 (2-wire) @ 115.2 K baud
Sensitivity Wavelength range   Pricing
130 photons/count at 400 nm; 60 photons/count at 600 nm 370 to 985 nm   Retail: $3149
 
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