CHEMUSB4-VIS-Fiber Spectrophotometer

The CHEM4-VIS-FIBER covers the 430-990 nm range, has optical resolution of 1.0 nm (FWHM) and captures 3648 wavelengths in <1 second.

The CHEM4-VIS-FIBER combines a USB4000 Spectrometer with modular accessories including an ISS-2 Integrated Sampling System, a 400 µm optical fiber and a 1-cm cuvette holder for absorbance measurements. The CHEM4-VIS-FIBER can also be used to make relative irradiance and emission measurements. The advantage of an optical fiber based system is flexibility. Add accessories including reflectance probes and dip probes for even more measurement options.

Features

• Fully integrated, pre-configured system covers the 430-990 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

• Flexible optical fiber-based system; easily add accessories

• Integrated deuterium tungsten halogen light source and cuvette holder

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

Light Source and Sample Holder

The CHEM4-UV-FIBER setup uses the ISS-2 Integrated Sampling System, a combination tungsten halogen light source connected to a holder for 1-cm cuvettes. The ISS-2 attaches to the spectrometer via a 400 µm optical fiber. The advantage of this design is that the light source can be easily coupled to other fiber optic accessories such as reflection probes or transmission dip probes.

Programmable Microcontroller

The CHEM4-VIS-FIBER 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 CHEM4-VIS-FIBER 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.

Plug-and-Play Operation

The CHEM4-VIS-FIBER 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; your spectrometer operating software reads these values for easy setup and hot swapping among PCs.

Serial port operation tips: When using the serial port, the CHEM4-VIS-FIBER 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.

Specifications

Physical
Spectrometer dimensions:	89.1 mm x 63.3 mm x 34.4 mm
Spectrometer weight:	190 grams
Light source dimensions:	155 mm x 50 mm x 53.3 mm
Light source weight:	240 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:	430-990 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:	600 mA @ 12 VDC; external power supply (included)
Pathlength:	1 cm
Cuvette shape:	Square
Light source:	Deuterium tungsten
"Z" dimension:	15 mm
Bulb life (hours):	900 tungsten
Time to stabilized output:	~30 minutes
Optical Fiber
Optical fiber:	P400-2-UV-VIS
Electronics
Power consumption:	250 mA @ 5 VDC
Data transfer speed:	Full scans to memory every 4 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:	5 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