Wasatch Photonics

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WP NIR OEM Spectrometer

Our development-ready WP NIR OEM spectrometer delivers the same high sensitivity as our lab-friendly WP NIR I spectrometer in an even more compact, robust footprint, backed by comprehensive engineering support.

  • Industry-leading, high efficiency optics
  • Patented VPH transmission gratings
  • Diffraction-limited design for better SNR
  • Excellent unit-to-unit reproducibility
  • Robust, thermally stable optical bench
  • Fiber coupled & free space models
  • ENLIGHTEN™ spectroscopy software – included!

Download full specifications    Download the OEM Products Brochure

At Wasatch Photonics, we’ve built a team that understands the unique needs of OEM customers, and a spectrometer bench that exceeds them. Our WP NIR OEM spectrometer is robust, compact, and easy to integrate, while delivering the same outstanding sensitivity and SNR of our standard products. It’s designed in transmission with diffraction-limited optics to remain aligned over temperature and at every wavelength, facilitating intensity matching to <10% across the spectrum, and powered by our free ENLIGHTEN™ spectroscopy software. Consistency is key when you’re designing a product to be built in the thousands, and we deliver – in performance, in expertise, and in the quality of our service. Contact us to discuss your application, or learn more about our OEM solutions.

WP NIR OEM Spectrometer Features/Benefits:

  • f/1.3 input to capture more light
  • High efficiency transmissive VPH gratings
  • >10x greater sensitivity & lower LOD
  • Low stray light and high signal to noise (SNR)
  • TEC cooling for best SNR
  • Fiber coupled or free space models
  • Compact, robust & configurable
  • Excellent thermal stability

We believe you should have full control and maximum flexibility when configuring your WP NIR OEM 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 25 and 50 μm slits for the WP NIR OEM spectrometer, 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 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/1.3 design delivers superior signal and ultra low background when used with matched NA fibers (0.36-0.39). Simplifies sample alignment in the lab or field.

Free-space coupling to spectrometer

This 0.36 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


We offer only TEC-cooled detectors for our NIR OEM spectrometers, ensuring best signal to noise ratio (SNR) and temperature stability in this thermally-sensitive detection regime.


Detector temperature ~ -15°C
Benefits Lowest dark noise option – highly consistent
Signal to noise Best SNR for lowest limits of detection
Applications Ideal for long integration time measurements


The WP NIR OEM spectrometer may be configured with your choice of slit size and sample coupling (fiber coupled or free space). Custom gratings to span your ideal range & resolution are available upon request, at extended wavelengths up to 2500 nm. Call us to discuss your custom OEM needs!

Want to get started with a benchtop model with the same great performance? Try our WP NIR I spectrometer.

  • f/#: 1.3
  • Wavenumber Range: 900 - 1700 nm
  • Blocking/Sorting Filter: Options available, depending upon application
  • Resolution, 25 um slit: 5 nm
  • Resolution, 50 um slit: 6 nm
  • Blocking/Sorting Filter: Options available, depending upon application
  • Fiber Port: SMA 905 (fiber coupled model) ; free space coupled model available
  • Size: 18.3 x 7.5 x 4.8 cm, 600 g

All WP NIR OEM spectrometers employ a TEC cooled detector for best signal to noise and temperature stability. See the  ‘Choose your model’ tab for more information on spectrometer configuration options.

  • Detector Type and Model: Hamamatsu G9214-512SA InGaAs
  • Active Pixels: 512
  • Integration Period Range: 1 ms - 60 s
  • Optional Regulated Detector: -15°C
  • Regulated Detector Temperature Stability: ± 0.2°C
  • System Operating Temperature Range: 0°C to 40°C, non-condensing
  • Data Interface: USB 2.0 Type B receptacle
  • Software: ENLIGHTEN™ operating software & drivers (included)

Engineering Documents

  • WP NIR OEM Engineering Drawing (coming soon!) > Product dimensions, layouts, and position of mounting holes
  • ENG-0001 > Spectrometer USB Interface Specification
  • ENG-0034 > Feature Identification Device (FID) EEPROM Specification

Brochures & Product Sheets

Tech Notes

  • Why Wasatch for Spectroscopy? > See the data to validate our faster measurements, low LOD, high SNR, and excellent mechanical stability.
  • The Wasatch Advantage > Explore the optical design of our spectrometers and their performance benefits.
  • Why Wasatch for NIR > See the data to back up our superior sensitivity, LOD, speed, and thermal stability in the NIR.