Upgrade your current Raman setup with this sensitive standalone extended range spectrometer, or build a new system from the ground up. Either way, you’ll have maximum configurability in choice of laser and sampling optics, and control over resolution and signal level with our user-interchangeable slit.
Are you developing a product? We offer an equally sensitive but streamlined OEM design with excellent stability and reproducibility.
DETECTOR COOLING OPTIONS
10 µm slit
25 µm slit
50 µm slit
Detector TEC setpoint
10 ± 0.2°C
-15 ± 0.2°C
3 ms – 60 s
8 ms – 60 s
SMA 905 connector (lens or FC/PC optional), f/1.3 (0.39 NA)
*Start and end wavenumber may be customized, but total range is fixed. Contact us for options.
Note: Specifications are subject to change based on available components & manufacturing data.
Detector Cooling Options
We offer two detector cooling options for the WP 785 ER Raman spectrometer, allowing you to balance your desired signal to noise and temperature stability against power draw and cost for maximum value:
TEC-regulated (-R): Detector is cooled externally to 10°C
TEC-cooled (-C): Detector has integrated cooling to -15°C
Need advice? Contact us to discuss what’s best for your specific application.
ENG-0134 > Interchangeable Slit Exchange & Use (coming soon)
ENG-0157> Empirical Power Draw and Power Supply Guidance for OEMs
We’ve made it our mission to design compact, portable Raman without compromise – instruments that deliver superior sensitivity at a cost-effective price point. We place one of our own perfectly matched, patented volume phase holographic (VPH) gratings at the heart of every spectrometer. With uniform response and low loss, these gratings enable a compact and highly efficient all-transmission optical design that minimizes loss and maximizes stability for consistent, high-SNR spectra.
Significantly higher signal than other, ‘low cost’ compact spectrometers
The pattern of peaks in a Raman spectrum is unique to the sample, providing a fingerprint which can be used to identify or analyze the material. The ‘fingerprint’ region up to 1500 cm-1 is often enough to confirm identity, while the extended ‘functional’ region out to 3600 cm-1 includes bands for additional, functional groups in a molecule. In addition to our standard models, we can design custom range spectrometers for OEMs. See below for common Raman spectral bands.
Alternate System Configurations
Need something slightly different? We offer a variety of alternate spectrometer models and system setups, and can offer expert advice on which may be the right match for your application.
These drop-in modules form the heart of our standard products – in fact, our optical bench is our OEM bench – allowing you to perform R&D with our standard products and then migrate to the OEM equivalent for prototyping and production with no loss of performance. Learn more about our our ‘OEM by design’ philosophy.
Choosing the right Raman wavelength for your application is a question of balancing sensitivity and selectivity. Although shorter wavelengths deliver the strongest Raman signal, fluorescence background can degrade signal-to-noise ratio (SNR) if the wrong wavelength is used. That’s why we offer wavelengths from 248-1064 nm, matching your specific needs and sample type to the best wavelength for the application. Explore our alternate wavelengths below. Still unsure of what you need? Contact us for a personal consultation or sample testing.
Reproducible Raman Measurements Raman OEM applications need consistent spectra to deliver dependable answers. Learn how to achieve >99.5% unit-to-unit agreement using a series of simple corrections.
Raman: Wavelength Matters Learn how to choose the right excitation wavelength to achieve maximum signal and minimum noise, from 405-1064 nm, for a wide range of sample types.
The Wasatch Advantage We’ve designed a spectrometer that maximizes efficiency at every step, to allow you to collect more light, keep more light, and detect more light. We'll show you how through its design.
Designing Raman Solutions Our toolbox for Raman spectroscopy gives you the flexibility to optimize your application without compromising on performance or size. Explore the many options!
Rapid Plastic ID with Extended Range Raman Raman spectroscopy beyond the fingerprint region proves ideal for polymer identification in high throughput sorting of plastics, discriminating within families & signaling the presence of additives.
Extending Raman’s Reach Learn how a reduction in spectrometer size need not mean a compromise in performance as compared to traditional benchtop Raman systems, thus expanding the possible applications served by Raman.
Cutting-edge results start with the right tools, and we’re here to help you excel. This spectrometer with integrated laser is designed to give you control and flexibility in your sampling optics, which makes it compatible with many applications. The onboard laser controls are provided through the spectrometer for ease of use and automated operation, with a single cord for power.
Are you an OEM? This unit is available in an equally sensitive but streamlined OEM design with excellent stability and reproducibility.
EXPLORE OUR OTHER 785 nm OPTIONS
Need something slightly different? We offer a variety of alternate spectrometer models and system setups, and can offer expert advice on which may be the right match for your application, whether research, industrial, or OEM.
Do you need to measure beyond 2000 cm-1 or closer to the laser?
We also offer our semi-integrated Raman system with a WP 785 ER spectrometer + integrated laser, which covers 100-3600 cm-1. This fingerprint + functional group range is a good forward-looking choice for research applications, or for industrial analysis of nanomaterials, water content, proteins, and other materials high in saturated bonds.
Would you like more long-term flexibility to change the laser?
Consider a fully modular Raman system with separate spectrometer, laser, and probe. This makes it easy to reconfigure your system to mix and match components as desired, change sampling accessory, or to re-use existing equipment.
Do you want the most compact system and highest signal possible?
A fully integrated Raman system brings the laser, sampling optics, and spectrometer together into one unit, eliminating fibers which add coupling losses and can break. A fully integrated system delivers considerably higher signal thanks to the integrated optics.
We give you control over configuration options like slit size, detector cooling, and spectrometer input to find the right specifications for your application (see below), and we provide options for range and system style when you need something different (see our ‘related products’ tab at right). Need advice, a demo, or want us to run a few samples? Contact us today
270 – 2000 cm-1 (all models)
10 µm slit
25 µm slit
50 µm slit
f/1.3, SMA-905 connector or free space input (0.36 NA)
10 ± 0.2°C (-R)
-15 ± 0.2°C (-C)
Integration time range
3 ms – 60 s
3 ms – 60 s
25 ms – 60 s
450 mW, multimode, FC connector
USB 2.0 Type B receptacle
Max Sampling Rate
16.5 x 16.2 x 8.2 cm
0°C to 40°C, non-condensing
<500 mA @ 12 V (slightly higher w/ laser)
*Installed with 270 cm-1 longpass filter as standard; custom filters available upon request
Note: Wasatch Photonics specifications are subject to change based on current available components and known manufacturing data.
Choosing the right detector
We offer three detector cooling options for the WP 785 Raman spectrometer + integrated laser, allowing you to balance your desired signal to noise and temperature stability with power draw and cost for maximum value. Not sure what’s right for you? Contact us to discuss.
A detector: No cooling, ambient (~25°C), cost-effective option for many applications R detector: TEC-regulated to 10°C, reduces need for regular dark measurements C detector: TEC-cooled to -15°C, suitable for long integration times
Expand to see how these detector cooling options compare
25 °C (ambient)
10 ± 0.2 °C
-15 ± 0.1 °C
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
Best for teaching and lab environments
Great for variable environments & handheld use
Ideal for long integration time measurements
Choosing your spectrometer input
How you route light to your spectrometer can vary depending on the type of sample, environment, and the goals of your measurement. The sampling coupling option is chosen at time of spectrometer order, but can be exchanged by special order.
Fiber coupling to spectrometer (-S)
Using a fiber to route light to and from your sample is both flexible and convenient, and can help to minimize interference from ambient light in the measurement path. To get superior signal and ultra low background from our f/1.3 design Raman spectrometers, we recommend the use of matched NA fibers (0.36-0.39). The image at left shows the SMA connector input to our spectrometer. A custom FC/PC input is available upon request (-FC).
Free-space coupling to spectrometer (-F)
Coupling light directly into a spectrometer slit gives you the freedom to design your own sampling optics, controlling parameters like sampling spot size and working distance. This approach is good for creating compact systems while minimizing coupling losses due to fibers. Our Raman spectrometers have a 0.36 NA input (shown at left), accepting light up to 21° off axis (42° full angle).
When we created our Raman spectrometers, we designed the optics we would want as spectroscopists, supported by the mechanics we know our OEM customers need. The result is a robust opto-mechanical design in a compact footprint, electronic interfaces that match use cases for academic, industry and OEMs alike, and – most importantly – the most sensitive design possible in a compact footprint.
We place one of our own perfectly matched, patented volume phase holographic (VPH) gratings at the heart of every spectrometer. With uniform response and low loss, these gratings enable a compact and highly efficient transmissive optical design that minimizes aberrations and alignment sensitivity for the optimum in manufacturability and thermal stability. The result? More than 10x better performance for Raman than a high-end f/4 crossed Czerny-Turner (CCT) spectrometer, and far less variability.
>10x BETTER SENSITIVITY
Photons are precious, particularly in Raman spectroscopy, which is why we designed and built an optical bench that allows you to capture, keep and detect more photons. For cyclohexane excited at 830 nm at a fixed integration time of 2 seconds, our WP 830 Raman spectrometer with TEC cooling detects 10x more signal than the a similarly configured f/4 CCT spectrometer with twice the slit size. Access new applications and take your most challenging Raman measurements to the field with our high sensitivity.
TRACE-LEVEL LIMIT OF DETECTION
Increased sensitivity allows you to significantly improve the limit of detection (LOD) of your experiment. As a benchmark, we looked at spectra for six dilutions of isopropyl alcohol in water, from 12.5% down to 0.05%. Defining LOD as SNR=3, our WP 830 cooled Raman spectrometer is able to detect concentrations as low as 0.13%, as compared to 3.06% for an f/4 CCT spectrometer. With a >20x advantage in LOD, we can help you see lower concentrations of samples than ever before, without compromising on size or cost.
TAKE SPECTRA IN <1/10th THE TIME
Count on our spectrometers to reduce your acquisition time significantly. In a head-to-head comparison of Raman spectra of cyclohexane excited using a 28 mW, 830 nm laser, the WP 830 delivered a strong signal in just 2 seconds, while an f/4 CCT spectrometer with twice the slit size needed 21 seconds to achieve the same signal intensity. From high throughput quality monitoring to handheld measurements and trace detection, our spectrometers give you the answers you need in a fraction of the time.
SUPERIOR STRAY LIGHT SUPPRESSION
Off-axis stray light degrades spectral quality and SNR and affects LOD, which is why we use a transmissive design and aberration-corrected optics to detect every possible photon. Our VPH gratings offer up to 40% higher efficiency, more uniform response with wavelength and polarization, and ultra-low scatter compared to reflective gratings. When tested against a TEC-cooled f/4 CCT spectrometer using a 900 nm long pass filter, our WP 830 showed half as much stray light – just 0.007% – for superior Raman performance.
EXCELLENT THERMAL STABILITY
A Raman spectrometer must perform reliably across a wide range of environmental conditions to avoid recalibration or compensation. To validate our opto-mechanical design, we monitored Xe spectra for our WP 785 spectrometer during temperature cycling, finding thermal shift to be <2 pixels over 0-40°C, half that of a typical f/4 CCT spectrometer. Our peaks also remain highly symmetric with temperature, giving you the thermal stability you need to achieve high accuracy in Raman spectral and library matching algorithms.
ENG-0001> Spectrometer USB Interface Specification