The QE Pro

The QE Pro from Ocean Optics is a high-sensitivity, back-thinned CCD array spectrometer. The device has outstanding quantum efficiency, wide dynamic range and extremely low noise operation for applications with low light levels and where wide concentration ranges are measured.

The QE Pro is suited for monitoring emission spectroscopy, particularly fluorescence and Raman, due to its high sensitivity. For both absorption and reflectance in quality control applications, QE Pro provides lower limits of detection and enables measurements over a wide concentration range.

Also, for kinetics researchers and scientists requiring fast, full spectrum acquisitions, the QE Pro provides onboard buffering capability. The 15,000 spectra onboard buffer maintains data integrity by buffering time-stamped spectra for USB communications. Buffering enables full-spectrum kinetics measurements, such as those used in chemical and enzyme kinetics or protein folding to be performed every 8ms (125 measurements per second).

Thermoelectric control of the detector improves the stability of the detector for lengthy measurements, where thermal noise convolutes the signal. TEC cooling dramatically reduces thermal noise and holds the QE Pro's stability to four dark counts over a 60°C ambient temperature range. This stability allows the spectrometer to be used for demanding online and at-line quality control measurements and environments susceptible to temperature changes.