STS Microspectrometer

/ Spectrometers

Amazing Full-Spectrum performance in a Tiny Footprint

The STS introduces a family of compact, low-cost spectrometers that’s ideal for embedding into OEM devices. At just 40 mm x 42 mm x 24 mm (1.6” x 1.7” x 0.9”), the STS provides full spectral analysis with low stray light, high signal to noise ratio and optical resolution of ~1.5 nm (FWHM) – remarkable performance for a spectrometer that size. The STS is an especially attractive option for high-intensity applications such as LeD characterization and absorbance/transmission measurements, yet versatile enough for an extensive range of spectral sensing requirements. At the heart of the STS is a cMoS detector in a crossed czerny Turner optical bench. The bench is distinguished by custom-molded collimating and focusing mirrors and a 600 lines/mm groove density grating that projects spectra onto the detector.

The unit achieves significantly better optical resolution and produces less stray light than most filter-based and other spectrometers of its size. For example, STS has 14- bit resolution and has low power consumption of just 0.75 W. Also, STS has triggering functions for instances where precise timing is necessary – for example, synchronizing measurements with an external event such as the pulsing of an excitation lamp for fluorescence. STS takes advantage of recent advances in cMoS detectors that elevate optoelectronic performance and improve system reproducibility.

It uses a 1024-element eLiS-1024 linear image sensor that’s responsive from 200- 1100 nm and has great sensitivity (6.74V/lux-second typical). This new generation of cMoS detectors offers excellent performance with great value.

STS options

We offer STS models for 350-800 nm (STS-ViS) and 650-1100 nm (STS-Nir) applications; a UV model is in development. each unit has a fixed optical bench configuration. custom configurations are available for high-volume applications. To optimize signal collection efficiency and improve reproducibility, STS utilizes a fixed-fiber design. The fiber has a 400 μm core and is 10 cm in length. The STS is fully operational in SpectraSuite spectroscopy software. operating and development software are priced separately.

  • Full Spectral Analysis in a Small Footprint cMoS-based unit is less than 50 mm (2”) square, weighs just 68 g (2.4 oz.)
  • Ideal for oeM Devices compact unit available at low cost and reproducible in large production quantities
  • Remarkable performance Meets or exceeds optical resolution, stability, sensitivity and other performance criteria associated with larger, more expensive spectrometers


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Dimensions 40 mm x 42 mm x 24 mm
Weight  68 g (2.4 oz. ), incl. fixed fiber
Operating temperature  0-50 °c, 5 °c change/hour ramp
Storage temperature  -20 to +75 °c
Detector type  eLiS-1024, 1024 pixel linear cMoS
Detector range  200-1100 nm (uncoated)
Pixels/size  1024, 7.8 x 125 μm
Pixel well depth  800,000 e-
 Optical Bench
Design  Crossed czerny Turner, focal length 28 mm
Entrance aperture  Shaped aperture; 10 μm, 25 μm, 100 μm and 200 μm slits
Gratings  600 l/mm
Fiber optic connector  10 cm x 400 μm fixed fiber (not detachable)
Quantum efficiency  60% (@ 675 nm)
Wavelength range  ViS (350-800 nm), Nir (650-1100 nm)
Optical resolution  FWHM 1.0 nm (10 μm slit), 1.5 nm (25 μm slit), 6.0 nm (100 μm slit), 12.0 nm (200 μm slit)
Signal-to-noise ratio  1500:1 (maximum signal)
A/D resolution  14 bits
Dark noise  ≤ 3 counts rMS
Dynamic range  6×109 (system, 10 s max integration), 5600 single acq.
Integration time  10 μs-10 s
Corrected linearity  0.5% max deviation from best fit line (10-90% saturation)
Max. dark current  75 counts/second
Power consumption  0.75 W (average)
Power options  USB or Gpio port
Data transfer speed  USB full speed
Acquisition time  75 scans/second
Connector  Micro-USB
Inputs/Outputs  Gpio
Breakout box  Available
Trigger modes  3 modes
Strobe functions  Single/continuous
Gated delay feature  Yes
 Computer requirements
Computer interface  USB 2.0, rS-232
Operating systems  Any supported by omniDriver/SeaBreeze or rS-232
Ce mark  Yes
RoHS  Yes
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Markets and Applications

The STS was conceived as a low-cost, high-performance spectrometer for oeM and high-volume applications where one or more wavelengths are being monitored and customers seek a highly reproducible result. Life sciences, medical diagnostics, solid state lighting and environmental analysis are among the industries where STS is an attractive alternative to filter-based optical sensing systems and other microspectrometer

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