Tobii Pro Spectrum

Screen-based eye tracker capturing gaze data at speeds up to 1200 Hz. This high-performance research system provides superior data quality and is designed for extensive research into behavior and eye movements – from fixation-based studies to micro-saccades.


High performance for extensive behavior research

The Tobii Pro Spectrum is our latest and most advanced eye tracking platform, designed for extensive studies into human behavior and the mechanics of the fastest eye movements. The system can capture data in high sampling frequency, while still allowing for natural head movement. This opens up new possibilities in fields like psychology, developmental studies, neuroscience, reading research, and ophthalmology.

The Pro Spectrum is designed to ensure the highest data quality and reproducibility through evolving, patented eye tracking algorithms from Tobii, sophisticated hardware design, and premium hardware components.

Tobii Pro Spectrum Eye Tracker Synced with EEG

Flexible set-up and sync options

The Pro Spectrum provides exceptional flexibility, accommodating a wide array of research scenarios and study designs.

This system can be used with the provided screen or with the eye tracker alone, enabling both on-screen and real-world stimuli, such as physical objects or people. Multiple sampling rate options accommodate everything from fixation-based research to studies with more intense requirements on data granularity and time-based measurements.

The TTL port and precise timing enable seamless synchronization capabilities with external biometric data sources, providing a holistic view of behavior.

  • 8-bit TTL port receiving sync events from external systems
  • Easily removable 24" screen

“The Tobii Pro Spectrum is the best device in the market for our research. We want the equipment to have high resolution but also to be relatively simple to use. The Pro Spectrum is very flexible to multiple settings and can be used for different purposes.”

Marco A. Palma, Associate Professor Department of Agricultural Economics and Director of the Human Behavior Laboratory, Texas A&M AgriLife, Texas A&M University

Unmatched freedom of movement

The Pro Spectrum tolerates more head movements than any other high-frequency screen-based eye tracker on the market. The system provides saccadic event resolution and extremely precise data.

This unique combination of capabilities allows researchers to deeply explore human behavior and cognitive processing, as well as the mechanics of the fastest eye movements (e.g. saccades, tremors, and micro-saccades), without interfering with the natural behavior of the subject. With its ability to track freely-moving subjects, the Pro Spectrum easily facilitates research with children and other participants who would otherwise need a chinrest to control their movement.

  • Very high tolerance for both large and fast head movements in all directions
  • Tracking resumes quickly if the subject moves in and out of the track box



Baby looking at puppets using Spectrum

“The Tobii Pro systems offer an unobtrusive means to collect data which ensures a more comfortable experience for our participants. The data is extremely rich and often provides insights into cognitive processes that cannot be attained from standard behavioral responses such as reaction time and choice.”

Dr Tom Beesley, Senior Lecturer, School of Psychology, UNSW Australia

Data you can trust

The Pro Spectrum is extremely accurate and precise with unparalleled tracking robustness, which makes it possible to study a very large portion of the population in many real-life conditions.

  • The 3-D eye model delivers superior gaze data, including wide gaze angles and all corners of the screen
  • Two eye tracking cameras, both taking up to 1200 images per second of both eyes
  • Both bright and dark pupil illumination produce superior eye image quality for processing, resulting in very high precision
  • Demonstrates extremely robust tracking capabilities, regardless of ethnicity, age, or corrective lenses
  • Detects eyes instantly with minimal data loss during blinks or when subjects look away
  • Maintains high accuracy, precision, and tracking robustness during subjects' head movements and in different lighting environments
  • Allows precise synchronization of gaze information with data from other sources, such as EEG, GSR, or ECG
  • Captures pupil data at the same sampling rate as the gaze data
  • Provides eye images to allow researchers to understand what is affecting the data
  • Monocular calibration can be conducted through the Tobii Pro Eye Tracker Manager or the Tobii Pro SDK. 

Simple, ingenious design

The Pro Spectrum's simple setup, configuration, and automation allow you to add advanced eye tracking to your research with little effort. Researchers at all levels of expertise can use the system without needing extensive training.

The eye tracker comes fully assembled in the supplied travel case and doesn't require manual configuration with the setup of cameras, lenses, etc. Researchers can rely on quick, stable calibration of subjects and productively track the subjects they have attained for their study.

  • Software for the stand-alone configuration accommodates studies that involve real-world stimuli
  • VESA mounting available for fixed table or wall installation
  • Handle allows for smooth adjustment when accommodating subjects of different heights


Pro Spectrum 4 setup modes

“It is essential that eye trackers can tolerate head movement while providing high level eye tracking capacity to enable tasks that better reflect real-world scenarios. Fast processing eye tracking with freedom of head movement opens up new opportunities for innovative mental health research.”

Professor Adam Guastella, Principle Research Fellow and Clinical Psychologist at the Brain and Mind Centre, Faculty of Medicine, The University of Sydney

Transparent product quality methods

The Pro Spectrum's high data quality has been confirmed through extensive testing. We use well-documented test methods that span from systematic variations of the environmental conditions to a general assessment of the eye tracker performance with a large population of individuals.

Consistent reproducibility in studies is guaranteed with quality control procedures throughout the entire production process, including camera focus and the calibration of each unit. Multiple product certifications ensure that quality and user safety requirements are met.

Tobii Pro SDK

The Tobii Pro SDK provides a comprehensive toolkit for researchers and partners who wish to develop analytical applications or scripts to use with the Pro Spectrum and other screen-based eye trackers from Tobii Pro.

This SDK gives access to the full set of advanced gaze data streams that are relevant to your research, and advanced timing support automatically compensates for time differences in real time, providing millisecond synchronization accuracy.

The Pro SDK offers multi-platform support (including the latest versions of Windows, Linux, and Mac) and API bindings for several programming languages (.NET, Python, and Matlab).

Learn more or download the Pro SDK free of charge.

“I recommend the Tobii Pro SDK highly for anyone who wants to develop custom applications for eye trackers from Tobii Pro. In less than 10 hours of work, I was able to create a fully-functioning and flexible python script that does essentially everything I would want done with an eye tracker.”

Dr Marcus R Watson, Department of Biology, York University


Eye tracker unit

The eye tracker unit can be used together with the provided monitor, or it can be used alone with other screens or real-world stimuli.

This unit, without the monitor, measures 55 cm x 18 cm x 6 cm (22" x 7" x 2"). The eye tracker is mounted on a stand, which raises it from the surface with 9 cm (approx. 4").

Tobii Pro Spectrum X-Mode


The removable high-resolution 24" monitor accommodates the display of on-screen stimuli and has been carefully selected from a high-quality display manufacturer to meet the highest demands on stimuli presentation.

A low and stable response time of less than five milliseconds makes it suitable for studies where control of the timing of the stimuli presentation is essential. The IPS panel has a 178-degree viewing angle, which ensures a consistent experience of the stimulus presented, independent of where the subject is positioned.

We recommend using this monitor, but optionally other monitors can be used too.

Tobii Pro Spectrum straight on

Eye Tracker Manager 

The Eye Tracker Manager application helps users of the Tobii Pro SDK manage the eye tracker. This tool helps with updating the firmware, changing the sampling frequency, calibrating the user, and configuring the hardware to a standalone scenario, when the setup does not require the included monitor.

Eye Tracker Manager works with both Windows and Mac.

Download the Eye Tracker Manager free of charge.

Tobii Pro Eye Tracker Manager


Eye tracking specifications

Eye tracking technique

Binocular bright and dark pupil tracking.
Two cameras capture stereo images of both eyes for accurate measurement of eye gaze and eye position in 3D space, as well as pupil diameter. 

Sampling frequency 60, 120, 150, 300, 600 or 1200 Hz (max. frequency depends on hardware version)
Accuracy* 0.3° at optimal conditions (down to 0.16°)
Precision* 0.06° RMS at optimal conditions (down to 0.04°)
Precision Filtered* 0.01° RMS at optimal conditions
Max. gaze angle 30°
Freedom of head movement

Width x height: 34 cm x 26 cm at 65 cm (13.5'' x 10'' at 26''). (At least one eye tracked)

Operating distance

55 to 75 cm (22'' and 30'') from the eye tracker reference point

Total system latency Less than 3 frames (less than 2.5 ms for 1200 Hz)
Blink recovery time 1 frame (immediate)
Gaze recovery time

Less than 150 ms

Recommended monitor Supplied 23.8" monitor 
Data output (for each eye) Timestamp
Gaze origin
Gaze point
Pupil diameter
Eye image data stream Eye image stream frequency is approximately 10 Hz. 
Zoomed-in eye images available in tracking mode.
Full-frame camera images are available in gaze recovery mode.
TTL input stream 8–bit timestamped data (256 event codes)
Event driven detection with a timestamp accuracy of 50 µs
Tracker and client time synchronization Integrated synchronization between the eye tracker time domain and the client computer time domain with an accuracy of 100 µs.

* Tobii Pro uses an extensive test method to measure and report performance and quality of data. Please download the data quality test report for more detailed information.

Eye tracker unit

Dimensions 55 cm x 18 cm x 6 cm (22" x 7" x 2'')
The eye tracker is mounted on a stand, which raises it from the surface by 9 cm (approximately 4"). 
Weight 5.1 kg (11.4 lbs.)
With the power supply unit, the weight is 5.7 kg (12.9 lbs.). 
Eye tracker processing Integrated
User camera mount Standard 1/4" thread
Connectors TTL input: 8-bit (DB-9 connector)
Communication: Ethernet (RJ-45 connector)
Power supply: 24 VDC (5.5 mm connector)
Power Max. rated power consumption: 96 W
Typical power consumption: 60 W
External power supply Input: 100-240 VAC 50/60 Hz
Max. rated power consumption: 120 W
No load power consumption: <0.15 W
Energy efficiency level: VI
Complies with EISA 2007/DoE, NRCan, AU/NZ MEPS, EU ErP, and CoC Version 5


Monitor model name EIZO FlexScan EV2451
Panel type IPS, LED backlight
Screen size (diagonal) 23.8''
Weight 3.8 kg (8.4 lbs), incl. mounting
Aspect ratio 16:9
Resolution 1920 x 1080 pixels
Screen response time 5 ms (Gray-to-gray)

Display port
1 port for monitor control (USB 3.0)
2–port USB hub (USB 3.0)
C13 power connector
Audio input connector: 3.5 mm
Headphone jack: 3.5 mm

Built in speakers

1.0 W + 1.0 W

Power supply

100-240 VAC 50/60 Hz


Max. rated power consumption: 42 W
Typical power consumption: 13 W
Power Save Mode: 0.5 W

Power Management: Power Save (VESA DPM, DisplayPort -Rev 1.1a, and DVI DMPM)

Software and framework compatibility

Tobii Pro Lab
Tobii Pro Eye Tracker Manager
Tobii Pro SDK  
E-Prime 3
Any applications built on the Tobii Pro SDK


Our eye trackers combine excellent accuracy and precision with an extremely high tolerance for large head movements and a variety of environments. Read more


We have developed a test method to make it possible to compare different eye tracking systems. Repeat the tests by using the test specifications and judge the quality of the products yourself. Read more

How do Tobii Eye Trackers work?

In this section we will describe how an eye tracker works. Read more

Learn and support

Related Products

Tobii Pro Lab, eye tracking software
Eye tracking software for behavior research. Combination with other physiological data while you design, execute, and analyze with heat maps, gaze plots. Read more

Related Services

Tobii Pro help you get started with online training. This two-hour session will help you to install and learn how to operate your eye tracking system. Read more
Tobii Pro offers onsite installation of your eye tracking system. This one-day training provides a basic understanding of the hardware and the software. Read more

Fields of Use

Psychology and Neuroscience

Eye tracking is used in different fields of psychology and neuroscience to understand how and why eye movements are made and how we gather information with our eyes. Read more

Infant and Child Research

Infant and child researchers use eye tracking to study perceptual, cognitive, and social-emotional development from birth through early adulthood. Read more

Clinical Research

Researchers are seeking to find meaningful analysis of eye movement information to accurately identify and treat ocular disease and disorders such as autism, ADHD, Parkinson’s disease and more.  Read more