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USB Series Spectrometers Overview
Choosing the Best USB2000+ or USB4000 Option for Your Application
Ocean Optics USB-series spectrometers are versatile performers for a wide array of applications. Although our flagship USB2000+ and USB4000
spectrometers have comparable electronics and architecture, they do have one very important difference: their linear CCD array detectors. In addition,
USB2000+ and USB4000 spectrometers are available in application-ready (preconfigured for specific application types) and build-your-own (userconfigured
for maximum flexibility) versions.
Comparing the USB2000+ and USB4000 Spectrometers
The USB2000+ has a 2048-element Sony ILX511B detector and the USB4000 has the 3648-element Toshiba TCD1304AP detector. Both are linear silicon
CCD arrays, with an effective range of 200-1100 nm, and are available with the same optical bench accessory options (quartz window for UV performance,
order-sorting filters and so on).
Spectrometers
Advantages of the USB2000+
- Its Sony ILX511B detector is coated with a phosphor for better response in the UV,
making it especially useful for applications below 350 nm.
- It has a faster minimum integration time – 1 ms compared with 3.8 ms for the
USB4000. That’s an advantage for applications involving transient events such as
measuring a pulsed light source.
- In applications where you have a considerable amount of light, its faster integration
time helps you avoid saturating the detector.
Advantages of the USB4000
- It has better response at wavelengths beyond 400 nm, making it a good choice for
VIS-Shortwave NIR applications.
- Its signal to noise ratio (300:1) and sensitivity (130 photons/count @ 400 nm) are
slightly better than that for the USB2000+. This is important in low-light level
applications.
- It’s slightly less expensive than the USB2000+. Both systems offer great value at a
reasonable price. But if you’re equipping a lab with multiple units and are primarily
working in the VIS-NIR, the per-unit savings you realize could be applied to completing
your order with our light sources, accessories and other complementary products.
USB Series Spectrometer Models at a Glance
You can configure a USB2000+ or USB4000 with gratings and optical bench accessories for a myriad of application possibilities. Or, over the next
several pages, investigate one of the nearly 10 different application-ready USB2000+/USB4000 systems described in the table below:
General Use
Best for USB2000+ Series USB4000 Series
USB2000+UV-VIS
USB2000+VIS-NIR
USB4000-UV-VIS
USB4000-VIS-NIR
Extended range (200-1050 nm) USB2000+XR1 USB4000-XR1
Fluorescence No preconfigured models USB4000-FL (several excitation wavelength options)
Irradiance USB2000+RAD No preconfigured models
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