CHEMUSB4-VIS-NIR Spectrophotometer

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.

The CHEMUSB4-VIS-NIR is available for Call for Price.

Features

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

• See changes as small as 0.01 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

The CHEMUSB4-VIS-NIR uses the USB-ISS-VIS 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.

Programmable Microcontroller

The CHEMUSB4-VIS-NIR uses our USB4000 Spectrometer. The USB4000 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 an Applications Scientist regarding what you'll need to program the GPIOs.)

Modular Design

Ocean Optics offers complete line of fiber optic sampling accessories and teaching tools to further enhance your CHEMUSB4-VIS-NIR system. Most accessories have SMA 905 connectors for application flexibility; changing the sampling system is as easy as unscrewing a connector and adding new components or accessories.

For even more flexibility, consider the CHEM4-VIS-FIBER. An optical fiber based system, the CHEM4-UV-FIBER lets you quickly and easily couple fiber optic accessories, such as reflection probes or transmission dip probes, to the system's light source.

Plug-and-Play Operation

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 unique to each spectrometer is programmed into a memory chip on the USB4000; our spectrometer operating software reads these values for easy setup and hot swapping among PCs.

Serial port operation tips: When using the serial port, the USB4000 requires a single 5-volt power supply (not included). Also, SpectraSuite Spectroscopy Software does not support spectrometer operation via the serial port. However, using the included Serial Port Command Set, you can write your own software that makes serial port operation possible.

Convenient Calibration

To maintain the quality of your spectrometer's wavelength calibration, we recommend our drift-free, calibration light sources. Click here for details.

Specifications

Physical
Spectrometer dimensions:	89.1 mm x 63.3 mm x 34.4 mm
Spectrometer weight:	190 grams
Light source dimensions:	40.7 mm x 88.8 mm x 34.1 mm
Light source weight:	130 g
Detector Specifications
Detector:	Toshiba TCD1304AP Linear CCD array
Pixels:	3648 pixels
Pixel size:	8 μm x 200 μm
Pixel well depth:	100,000 electrons
Signal-to-noise ratio:	300:1 (at full signal)
A/D resolution:	16 bit
Corrected linearity:	>99.8%
Sensitivity:	130 photons/count at 400 nm; 60 photons/count at 600 nm
Optical Bench
Design:	f/4, Asymmetrical crossed Czerny-Turner
Focal length:	42 mm input; 68 mm output
Entrance aperture:	25 µm wide slit
Grating:	Grating #2
OFLV filter:	OFLV-350-1000
Fiber optic connector:	SMA 905 to 0.22 numerical aperture single-strand optical fiber
Spectroscopic
Wavelength range:	370 to 985 nm (The actual range typically exceeds what's listed here. The range listed is where you will see changes as small as 0.01 absorbance units.)
Optical resolution:	1.0 nm FWHM
Signal-to-noise ratio:	300:1 (at full signal)
A/D resolution:	16 bit
Dark noise:	50 RMS counts
Integration time:	3.8 ms to 10 seconds
Dynamic range:	2 x 108 (system), 1300:1 for a single acquisition
Stray light:	<0.05% at 600 nm; 0.10% at 435 nm
Light Source/Sample Holder
Power consumption:	160 mA @ 5 VDC; external power supply (included)
Pathlength:	1 cm
Cuvette shape:	Square
Light source:	Tungsten halogen and violet LED
"Z" dimension:	15 mm
Bulb life (hours):	45,000
Time to stabilized output:	~5 minutes
Electronics
Power consumption:	250 mA @ 5 VDC
Data transfer speed:	Full scans to memory every 5 ms with USB 2.0 port, 18 ms with USB 1.1 port
Inputs/Outputs:	Yes, 8 onboard digital user-programmable GPIOs
Analog channels:	No
Auto nulling:	Yes
Breakout box compatible:	Yes, HR4-BREAKOUT
Trigger modes:	4 modes
Strobe functions:	Yes
Connector:	22-pin connector
Computer
Operating systems:	Windows 98/Me/2000/XP, Mac OS X and Linux with USB port; Any 32-bit Windows OS with serial port
Computer interfaces:	USB 2.0 @ 480 Mbps (USB1.1 compatible); RS-232 (2-wire) @ 115.2 K baud
Peripheral interfaces:	SPI (3-wire); I2C inter-integrated circuit
Pricing
Retail:	$3464