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Scientific grade spectrometer (QEPRO)

/ Spectrometers

The scientific grade spectrometer

The QEPRO is the most sensitive spectrometer ocean optics has ever developed. This scientific grade spectrometer is especially well suited for low light level and advanced measurements, such as absorption, reflectance, Raman spectroscopy and fluorescence.

A 15,000 spectra buffer ensures data integrity at high collection rates and an advanced optical design and thermoelectric cooler combine to provide thermal stability over long-term measurements. Whether for high speed or wide concentration range measurements, the QE Pro brings exceptional performance to your lab or process application. Buffering enables full-Spectrum kinetics measurements to be performed every 8 milliseconds or 125 measurements per second.

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  • Wavelength range: 185-1100 nm
  • Buffering : 15,000 spectra
  • TEC: Cooling to -40°C below ambient
  • -40°C to +50°C temperature limits
  • Back-thinned 2d ffT-ccd detector
  • Thermoelectric cooling
  • High-speed electronics
  • Onboard programmable micro-controller
  • 10 user-programmable digital inputs/outputs
  • Medical diagnosis
  • Material identification
  • Polymerisation monitoring
  • Thin-film reflectivity
  • Corrosion studies
  • Bio analysis
  • Astronomy research
TypeBack-thinned 2d ccd detector
Detector range185 – 1100 nm
Active pixels1024 x 58
Pixel size24.6 μm2
Pixel well depth1000 Ke-
Peak QE90%
QE @ 250 nm65%
Sensitivity~ 0.065 counts / e-
Wavelength rangemax. 825 nm
Optical resolution~ 0.14 - 7.7 nm (fWhm)
Signal-to-noise ratio1000 : 1
Dark noise3 rms counts
Dynamic range25000 : 1
Integration time8 ms - 15 minutes
Designf/4, symmetrical crossed czerny-Turner
Focal length101.6 mm input and output
Entrance aperture5, 10, 25, 50, 100 or 200 μm
Grating options14 different grating options, UV through shortwave nir
Fibre optic connectorSMA 905 to 0.22 numerical aperture single-strand optical fibre
Dimensions182 x 110 x 47 mm
Weight1.18 kg (without power supply)
Power consumption 500 mA @ 5 VDC no TE cool; 3.5 A @ 5 VDC with TE cool
Data transfer speed Full spectrum every 7 ms with USB2.0
Inputs/Outputs 10 onboard digital user-programmable GPIOs
Temperature & Thermoelectric (TE) COOLING
Temperature limits 0°C to 50°C for spectrometer, no condensation
Temperature range 13°C maximum range between the high and low
Lowest set point 40°C below ambient, to -15°C
Stability ±0.1 o C of set temperature in ≤ 2 minutes
Operating systems Windows, mac os, Linux
Computer interfaces USB 2.0 @ 480 mbps; rs-232 (2-wire) @ 115.2 K baud
Peripheral interfaces SPI (3-wire); i2c integrated circuit

Low-noise electronics and an 18 bit A/D converter double the QE Pro’s dynamic range and increase its sensitivity by a factor of two compared with typical back-thinned CCD array miniature spectrometers. These enhancements drive applications benefits such as improved lower limit of detection for both absorption and fluorescence measurements, and enable measurements over a wider concentration range

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