Wasatch Photonics

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WP UV-VIS Spectrometer

Optimize this high sensitivity spectrometer with our build-to-print resolution, sample coupling, and detector cooling options. Achieve analytical lab-quality measurements in a fraction of the footprint and cost!

  • 250-850 nm wavelength range
  • Linear absorbance up to 3.2 AU @ 300 nm
  • High sensitivity for rapid measurements
  • Superior stray light suppression, high SNR
  • Trace-level limit of detection
  • Benchtop quality data, “compact” price
  • Fiber-coupled & free space models
  • ENLIGHTEN™ spectroscopy software – included!
Download full specifications

We believe you should have full control and maximum flexibility when configuring your spectrometer. That’s why we offer so many build-to-print options for range, resolution, detector cooling, and sample coupling – backing each with our advice and experience. Learn more about each below, or contact us to discuss the best options for your application.

SLIT WIDTH: Defining Resolution

Sensitivity and resolution are competing factors when choosing slit size. A larger slit allows more light to enter the spectrometer, increasing sensitivity for low-light applications such as fluorescence. Resolution improves, however, as slit width is reduced (though not always linearly). We offer 10, 25, and 50 μm slits for many of our spectrometers, and can advise on the best choice for your application. Due to the high sensitivity of our low f/# spectrometer designs, it is often possible to use a smaller slit width than would be required with a typical f/4 spectrometer, allowing you to achieve higher resolution.

SAMPLE COUPLING: Fiber-coupled or free-space?

How you interface with your sample depends not only on whether you value convenience or configurability, but also on the data quality you require.  See below for some quick tips.

Fiber coupling to spectrometer

Our f/2.0 design delivers superior signal and ultra low background when used with matched NA fibers (0.24). Simplifies sample alignment in the lab or field.

Free-space coupling to spectrometer

This 0.24 NA input offers superior signal & freedom in the design of your own sampling optics, from spot size to working distance. Ideal for research & OEMs.

DETECTOR COOLING: Controlling noise

Detector Cooling Options

We offer ambient, regulated, and TEC cooled detectors, allowing you to balance your required signal to noise ratio (SNR) and temperature stability with cost for the best possible value.

An uncooled detector is often adequate for many basic spectroscopy applications, but for lowest limit of detection and long term measurements, a thermoelectrically cooled (TEC) detector delivers unparalleled performance. Contact us to discuss the right choice for your application.




Detector temperature ~ 25°C ~ 10°C ~ -15°C
Benefits Most cost effective option for quick measurements Fixed dark noise (better spectral reproducibility) Lowest dark noise option – highly consistent
Signal to noise Good SNR high throughput detector Improved SNR compared to ambient detector Best SNR for lowest limits of detection
Applications Best for teaching and lab environments Great for variable environments & handheld use Ideal for long integration time measurements


Spectrometer may be configured with your choice of slit size and sample coupling (fiber coupled or free space), and detector cooling. Custom wavelength range models down to 220 nm are available upon request, so call us to discuss your OEM needs!

  • f/#: 2.0
  • Slit Height: 2 mm
  • Spectral Range: 250 - 900 nm (A) | 250 - 850 nm (C)
  • Resolution, 25 um slit: 2.5 nm (A) | 2.3 nm (C)
  • Resolution, 50 um slit: 3.5 nm (A) | 3.2 nm (C)
  • Fiber Port: SMA 905 (fiber coupled model) ; free space coupled model available
  • Size: 16.0 x 14.5 x 6.0 cm

We offer ambient (A) and TEC cooled (C) detectors, allowing you to balance your desired signal to noise and temperature stability with cost for maximum value.

Learn more about our detector cooling options.

  • Detector Type and Model: Hamamatsu S10420-1106 (A) | S7031-1006 (C)
  • Active Pixels: 2048 x 64 (A) | 1024 x 58 (C)
  • Pixel Dimensions: 14 x 14 μm (A) | 24 x 24 μm (C)
  • Quantum Efficiency Max: 70% average /77% peak (A) | 74% average /93% peak (C)
  • Integration Period Range: 1 ms - 60 s (A) | 8 ms - 60 s (C)
  • Signal to Noise: 500:1 (A) | 1000:1 (C)
  • Dynamic Range System: 50,000 (A) | 125,000 (C)
  • Read Noise: 6 e- RMS (A) | 8 e- RMS (C)
  • Optional Regulated Detector: 10°C (R) | -15°C (C)
  • Regulated Detector Temperature Stability: ± 0.2°C (R) | ± 0.1°C (C)
  • Cooling Controls: ON/OFF/LOCK
  • System Operating Temperature Range: 0°C to 40°C, non-condensing
  • Data Interface: USB 2.0 Type B connector (female)

Brochures & Product Sheets

Tech Notes

Application Notes

  • Authentication of Turmeric > Learn how UV-VIS measurements can be used to confirm identity of turmeric via short wavelength absorbance peaks.

We’ve maximized the efficiency of our spectrometers to give you more sensitivity, better SNR, and faster measurements in a compact footprint. Collect more light with our f/2.0 input, keep more light with our patented high transmission VPH gratings & diffraction-limited optics, and detect more light with scientific-grade detectors. Our build-to-print options for resolution, detector cooling, and sample coupling allow you to configure a spectrometer or system with the exact performance you need, powered by our free ENLIGHTEN™ spectroscopy software.

Call us to discuss your application!

WP UV-VIS Spectrometer Features/Benefits:

  • Wavelength range is 250 - 850 nm
  • Industry-leading high efficiency optics
  • f/2.0 input to capture more light
  • Patented VPH transmission gratings
  • High sensitivity for fast data sampling rates
  • Linear absorbance up to 3.2 AU @ 300 nm
  • Low stray light for superior LOD
  • Fiber coupled & free space models
  • Compact, robust & configurable