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Optical Spectrometer

Product Code G2001B1
Price £1,600.00 ex. VAT

Low price USB spectrometer for UV-Vis-NIR optical spectroscopy

Measure the spectrum of light over a wide spectral range, from 320 nm to 1050 nm

Ossila Optical Spectrometer

The Ossila Optical Spectrometer is a fast, reliable, and compact USB spectrometer which brings affordable UV-Vis-NIR (320 nm to 1050 nm) spectroscopy to research scientists around the world. Featuring powerful electronics, precision optics and intuitive software, the device is perfect for a range of optical experiments.

We recommend the complete optical spectroscopy bundle, which comes with everything you need to get started, but the spectrometer is also available to buy separately (with software) for a slightly lower price. Covered by our two year warranty as standard and eligible for quick and free shipping, the Ossila Optical Spectrometer is a dependable, low price solution for measuring the properties of light.

Built to simplify transmission, reflection, scattering, absorption and luminescence measurements, the spectrometer is both easy to use and fully programmable. Our free intuitive spectroscopy software allows you to quickly and easily begin taking measurements, just plug the spectrometer into a PC via the supplied USB to USB-C cable to get started. For those with existing UV-Vis-NIR optical spectroscopy setups, the spectrometer has wide compatibility with other equipment; a simple command library and internal and external triggers make it easy to fully integrate the device into your workflow.

To fully equip your lab, the spectrometer can be paired with the Ossila Broadband White Light Source and our range of spectroscopy accessories, which includes our transmission holder, cuvette holder, optical fiber, optical breadboard plate and more. For the best value, the complete optical spectroscopy bundle includes all of the above, plus a second optical fiber.

What is an optical spectrometer?

In general, a spectrometer is a device that separates spectral components of a continuous characteristic such as electromagnetism so that it can be measured. An optical spectrometer takes a beam of light and separates it into its constituent wavelengths using a dispersive element such as a grating or prism, and then measures the relative intensities of these wavelengths using an optical sensing element. Optical spectrometers work primarily in the visible light region of the electromagnetic spectrum, extending into the UV and IR regions, and are used to perform optical spectroscopy.

Optical spectroscopy uses light to probe the properties of materials or structures. By studying the wavelength and intensity of light that is emitted, transmitted, reflected or absorbed by a material or structure, various properties of the sample can be determined. For example, the concentration of molecules in solution can be determined by measuring the light absorbed by the solution, or the thickness of films can be calculated by the reflected light.

Key Features

Wide UV-Vis-NIR spectral range

Wide spectral range

The Ossila Optical Spectrometer measures the entire visible light spectrum, from the UV-A band to the near infrared (320 nm to 1050 nm). The spectrometer can therefore be used to study a wide range of material systems including photovoltaic, solar cell, OLED, biological, and 2D materials. To minimise the impact of higher diffraction grating orders on the spectra, a filter is included to partially cover the detector when performing spectroscopy in the visible range.

The Ossila Broadband White Light Source (included with the complete optical spectroscopy bundle or available to buy separately) has been designed for use with the spectrometer, outputting light over the wavelength range of 370 nm to 900 nm.

Powerful electronics

Powerful electronics

A powerful Arm cortex M4 processor works with a low-noise, high-speed 16-bit, 500 kSPS analog-to-digital converter (ADC) to provide fast and accurate operation, all powered through a 'plug-and-play' USB type-C connection. Thanks to its powerful electronics, the spectrometer is capable of transferring over 100 frames-per-second to the host computer via the USB cable when running in internal trigger mode.

Alongside the USB power and data connector, a six port I/O expansion header allows for easy integration with other 5V equipment.

Free spectrometer software

Free software or interface through simple serial commands

The spectrometer system includes powerful spectroscopy software to help you start measuring quickly. Intensity, transmission/reflection and absorbance measurements are all available. Additional features include spectral averaging and accumulation, autosaving, peak detection, offset and gain adjustment, and more.

The system can be integrated with other hardware using the simple serial command interface, compatible with most programming languages. A full list of commands is included in the product manual along with a number of examples in Python to help you get started.

USB spectrometer enclosure and case

Precision engineered, compact enclosure

The clever design of the Ossila Optical Spectrometer closely integrates the enclosure, optical elements, and internal electronics. The result is a lightweight, compact, but powerful UV-Vis-NIR spectrometer. The high strength enclosure has excellent dimensional accuracy, providing the high precision needed for the internal optics.

The Ossila Spectrometer is compact, and capable of withstanding heavy daily use in the lab. The optional spectrometer case (pictured), included in the complete optical spectroscopy bundle and available to buy separately, also allows it to be bolted to standard optical tables or breadboard plates.

Internal and external trigger spectrometer modes

Internal and external trigger modes

Use the optical spectrometer in free-running mode, or integrate with other systems using the external trigger input. The unique rolling integration mode, which begins acquisition with a 5V rising edge on the rolling integration port and ends it when the voltage at the port returns to 0V, allows the integration time to be controlled dynamically by external trigger signals.

The spectrometer includes an output to synchronise acquisition with an external shutter, and also has two programmable general purpose output pins. In total, it features six I/O ports, including a ground port.


I have been using the Ossila Optical Spectrometer in my research to measure absorption, transmission, and reflectivity. I highly recommend it to anyone who is looking for a cheap, fast, reliable and easy-to-use spectrometer for their optical experiments.

Kyriacos Georgiou, PhD, University of Cyprus

USB spectrometer with free software
The USB powered Ossila Optical Spectrometer comes with free PC software

Included with the Ossila Optical Spectrometer

USB Spectrometer and Spectroscopy Software

USB Spectrometer

USB Optical Spectrometer

The Ossila Optical Spectrometer with USB-C cable. Simply install the spectroscopy software and plug the spectrometer into a standard USB port on your computer to get started. The Ossila Optical Spectrometer has a 320 nm to 1050 nm spectral range (covering UV-A, visible, and near IR), powerful internal electronics, and measures just 78 mm x 78 mm x 38 mm. The Optical Spectrometer Complete Bundle offers the best value, but the Ossila Optical Spectrometer is available as a standalone unit with the Ossila Spectroscopy Software package for just £950.00.

Eligible for FREE worldwide shipping and covered by our two year warranty.

Spectroscopy software

Spectroscopy Software

The Ossila Spectroscopy Software makes it easy to control the spectrometer and measure intensity, transmission/reflection, and absorption. For custom integrations, the Ossila Spectrometer can also be controlled via a number of simple serial commands. These are supported by most programming languages, and can also be sent to the device via the spectroscopy software command window.

The Ossila Spectroscopy Software is supplied on the included USB memory stick. The latest version can also be downloaded via our website at any time.

Spectroscopy Equipment (Complete Bundle Only)

Broadband White Light Source

Broadband White Light Source

Our USB-C powered LED Broadband White Light Source outputs light over the entire visible spectrum (360 nm - 900 nm) from a single light source. Measuring just 30 mm x 70 mm x 40 mm, our broadband white light source is considerably smaller than other light sources for spectroscopy (such as tungsten-halogen lamps) and is perfect for a wide range of optical spectroscopy studies in the visible range. Supplied with a USB cable, and covered by our two year warranty.

Included with the complete spectroscopy bundle. Available separately for £120.00.

Spectrometer Case

Spectrometer Case

The Spectrometer Case allows the Ossila Optical Spectrometer to be bolted to any standard metric or imperial optical table or breadboard plate. Made from a tough partly flexible rubber and precision made for a snug-fit, it also provides the spectrometer with extra protection against drops and everyday damage.

Included with the complete spectroscopy bundle. Available separately for £120.00.

Cuvette Holder

Cuvette Holder

Compatible with standard 10 mm path length cuvettes including our UV Quartz Cuvettes and IR Quartz Cuvettes, the Ossila Cuvette Holder includes two removable plugs at 90 degrees to the optical axis to allow for fluorescence excitation. Suitable for use in either free space or fiber coupled arrangements and fixable to metric or imperial breadboard plates and optical tables.

Included with the complete spectroscopy bundle. Available separately for £130.00.

Spectroscopy Transmission Holder

Spectroscopy Transmission Holder

Hold rigid or flexible films and samples in place with the Ossila Spectroscopy Transmission Holder. Featuring a sprung clamp and a threaded connector for an SMA optical fiber, the transmission holder is an important part of any optical configuration that involves flat samples or films. The Spectroscopy Transmission Holder can also be used in a free space arrangement and can be fixed to either an metric or imperial optical table or breadboard plate.

Included with the complete spectroscopy bundle. Available separately for £100.00.

Two Optical Fibers

Two SMA Optical Fibers

Two 400 μm core, 1 meter long multimode SMA optical fibers allow for direct optical connections to be made between the Ossila Spectrometer, the Spectroscopy Transmission Holder or Cuvette Holder, and the Ossila Broadband White Light Source. Protective endcaps and a flexible steel outer sleeve prevent damage to the optical fibers, and the SMA connections make it easy to put together fiber coupled optical configurations.

Included with the complete spectroscopy bundle. Available separately for £90.00 each.

Optical Breadboard Plate

Optical Breadboard Plate

The Ossila Spectrometer (with protective case), Broadband White Light Source, Cuvette Holder, and Transmission Holder can be bolted to either metric or imperial breadboards. Our metric 150 mm x 300 mm anodized aluminium optical breadboard plate is the ideal size for small desktop configurations. The board features 55 M6 holes (a small pack of screws is provided) on a 25 mm grid. In addition, four untapped 5 mm holes in the corners allow it to be secured to a desk or workbench.

Included with the complete spectroscopy bundle. Available separately for £120.00.

Optical spectrometer bundle in situ
The complete bundle contains a complete set up for optical spectroscopy
Optical spectrometer protective case
A protective spectrometer case can also be purchased which enables the device to be secured to an optical bench

Spectroscopy Equipment and Accessories

  • White Light Source
  • Transmission Holder
  • Breadboard
  • More

Affordable Spectroscopy


Characterisation of LEDs, lasers, and more

The wavelength spectrum emitted by artificial light sources such as fluorescent tubes, halogen bulbs, LEDs and lasers determines their suitability for a given application. Indoor lighting generally requires a wide range of wavelengths, LEDs for colour displays should emit chromatically 'pure' light at a known wavelength, and the wavelength of a particular laser determines how far signals can travel when it is used for fiber optic communication. The Ossila Spectrometer can measure the spectrum of light from the UV-A band to the near infrared.

(Anti)reflection coating efficiency measurements

Thin film coatings are often applied to materials to modify how light interacts with the surface. These coatings generally take the form of a layer of metal, to create a mirror, or layers of transparent dielectric materials which rely on interference effects to increase or reduce the reflectivity of a surface. Dielectric coatings are used for antireflection coatings on eyeglasses, camera lenses, lasers, and microscopes. Spectrometers like the Ossila Optical Spectrometer can be used to quantify both the effectiveness of a coating and how this varies with wavelength.

Investigations into absorbing materials

The light that is absorbed by a material can offer insight into its atomic structure. For example, peaks seen in the optical absorption spectrum of a molecule correspond to the energy separation between electron orbitals, which can reveal information about the nature of the chemical bonds in the material. The amount of light absorbed by a sample can also give a quantitative measure of the concentration of absorbing molecules within the sample through the Beer-Lambert law.

Fluorescence detection

Fluorescence measurements are complimentary to absorption (and generally more far sensitive) and can provide information about the vibrational states of a molecule. They can also be used for detecting dopants/contaminants, identifying materials, and observing changes in a chemical environment. Highly fluorescent molecules are widely used in biological studies to 'tag' particular cells or proteins, making them more visible.


Efficient photovoltaic devices require matching the absorption spectrum of the device to the emission spectrum of the source (usually the sun). The use of a spectrometer here is two-fold. Firstly, it allows the direct measurement of the source spectrum. The solar 'standard' spectrum for solar cells is well documented, however, it varies with location, time of day, season and weather. A spectrometer allows a real-world measurement of the solar radiation spectrum. Secondly, the absorption spectrum of the photovoltaic material can be measured and compared to the incident radiation.

Any Many More...

Optical spectroscopy has numerous applications across a number of different fields. Contact us to discuss your specific requirements.

Optical transmission holder with spectrometer
The spectroscopy transmission holder (sold separately) holds your substrate or film in place for absorption or transmission measurements

Support and Articles


Dimensions 78 mm x 78 mm x 38 mm (D x W x H)
Weight 150 g
Wavelength range 320 nm - 1050 nm
Grating blaze wavelength 500 nm
Resolution (FWHM) 2.5 nm
Optical input SMA 905 fibre or free space
Entrance slit width 25 um
Connection type USB type-C
Communication protocol Serial-over-USB
Dark noise* < 50 counts
Signal-to-noise ratio > 500:1
Detector type / pixels CCD / 1600
Analog-to-digital converter 16-bit, 500 kSPS
Data transfer speed* Up to 100 fps (PC dependant)
Stray light < 0.2 %

*measured at 50 us integration time

Price Information

Complete Optical Spectroscopy Bundle £1600.00
Ossila Optical Spectrometer £950.00
Ossila Spectroscopy Software FREE

The Ossila Optical Spectrometer is eligible for FREE worldwide shipping and is covered by our two year warranty as standard.

Spectroscopy Software

The Ossila Optical Spectrometer comes with powerful spectroscopy software which makes it quick and easy to control the device and start collecting data. Take background spectra and measure intensity, transmission / reflection and absorbance measurements in just a few clicks. The spectroscopy software also features spectral averaging and accumulation, peak detection, offset and gain adjustment, and more - all via a straightforward user interface.

Software updates are provided at no extra charge and are available to download from our website.

Spectrometer software showing white light source spectrum Spectrometer software in dark mode
The spectrometer software showing the spectrum for the Ossila Broadband White Light Source (hover/tap to see dark mode)

Software Features

No programming required

The Ossila Spectrometer can be controlled via the spectroscopy software. Setting up a spectroscopy experiment and taking optical measurements has never been easier. No programming knowledge required.

Intuitive and easy-to-use

The Ossila spectroscopy software has been designed to be intuitive and easy to use. Spectra workspaces allow you to take multiple spectra and view important numerical data at a glance. Common features and settings can be accessed via the quick access bar at the top of the screen.

Multiple measurement modes

The Ossila Spectrometer spectroscopy software makes it straight-forward to take measurements in five different measurement modes: intensity, intensity (background corrected), intensity (sensitivity corrected), transmission / reflection, and absorption.

Optional serial command interface

Serial commands can be sent to the spectrometer via the spectroscopy software. Alternatively, the spectrometer can be controlled via serial commands sent from most programming languages.

Software Requirements

Operating Systems Windows 10
CPU Dual Core 2.0 GHz
Available Hard Drive Space 300 MB
Monitor Resolution 1280 x 960
Connectivity USB 2.0

Software Installation

To install the spectroscopy PC software, download the latest version from our website or insert the supplied USB memory stick into your computer and run the "Ossila-Spectrometer-Installer-vX-X-X-X.exe" file. Once installed, plug the spectrometer in via the supplied USB type-A to USB type-C cable. When launched, the software will automatically detect any Ossila Spectrometers connected to the PC.

Command Library

The Ossila Spectrometer can be controlled using a simple serial command library; the device will appear as a COM port when connected to a PC. Commands can be sent via the command window in the spectroscopy software or via most programming languages. A full list of commands and example code is included in the user manual.

Frequently Asked Questions

The answers to some of the most frequently asked questions about the Ossila Optical Spectrometer can be found below. Please contact us for all other questions or inquiries.


To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.

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