Tobii Pro Spectrum with gaze
Tobii Pro Spectrum

Deeper insights into human behavior

Our most powerful eye tracking system captures gaze data at up to 1200 Hz. It’s a screen-based eye tracker designed for intensive scientific research, from fixation-based studies to micro-saccades.

Best-in-class technology

Tobii Pro Spectrum is our most advanced eye tracking platform, designed for intensive research into human behavior and the mechanics of the fastest eye movements. The system captures data at multiple sampling rates of up to 1200 Hz while still allowing for natural head movement.

Tobii Pro Spectrum

How it works

How does Tobii Pro Spectrum work?

Tobii Pro Spectrum

Set up

Tobii Pro Spectrum can be used with both on-screen and real-world stimuli. It comes fully assembled in the supplied travel case and doesn't require manual configuration of cameras or lenses.

Man looking at Tobii Pro Spectrum


Collect data from participants at multiple sampling rates of up to 1200hz. Study fixations, saccades, micro-saccades, and tremors, and record pupil diameter and eye openness data.

Tobii Pro Spectrum


Tobii Pro Spectrum works with
Tobii Pro Lab, supporting researchers from experiment design to data analysis. Calculate eye tracking metrics, create visual representations of data or export for further analysis in other software.


Data points

Data you can trust

  • Works across the population regardless of age, ethnicity, or corrective lenses

  • Keeps high performance through natural head movements

  • Maintains tracking robustness in different lighting environments

  • Provides eye images to help understand what affects the data

Fields of use

For intensive scientific research

Tobii Pro Spectrum is designed for detailed studies of natural human behavior and the mechanics of the fastest eye movements. Discover how you can advance your research in:

A woman looking at Tobii Pro Spectrum

Psychology and neuroscience

Delve deep into human behavior and discover the connections between eye movements and cognitive processes.

Person reading at a laptop using Tobii Pro Lab software

Reading and language

Measure how humans process and acquire language and understand eye movements during reading.

Baby looking at puppets using Spectrum

Developmental psychology

Study attention and gaze patterns, illuminating visual perception, social cognition, and language acquisition in the early stages of child development.

About the tech

  • Our patented 3D eye model delivers high-quality gaze, pupil and eye openness data

  • Two eye tracking cameras, taking up to 1200 images per second

  • Fully embedded processing and automatic selection of bright and dark pupil modes for best performance

  • Compatible with all main operating systems

  • Software for the standalone configuration accommodates studies involving real-world stimuli

  • VESA mounting available for fixed table or wall installation

  • The handle allows for smooth adjustment for subjects of different heights

Tobii Pro Spectrum hero shot

Precise synchronization for multimodal research

Tobii Pro Spectrum has accurate and flexible synchronization options with many external devices. The system supports both software synchronization through Tobii Pro Lab or Tobii Pro SDK, as well as hardware synchronization through its unique 8-bit TTL input port for microsecond timing accuracy.


Transparent product quality methods

Tobii 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. Our quality control procedures, such as the production process, camera focus, and calibration, guarantee consistent study reproducibility.

Read more about our data quality metrics

Compare eye trackers

Not sure which eye tracker to choose?

Compare our screen-based eye trackers to decide which one is the best choice for your research needs.


  • 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. Tobii 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

    Texas A&M Agrilife logo

Technical specifications

For definitions of the terms used in the tables below, see the Glossary on Tobii Connect.

For more information about output data and the supplementary data stream, please read the Tobii Pro SDK documentation.

The characteristics of the gaze data from an eye tracker are described in terms of accuracy and precision. For more details, take the Accuracy and precision course in Tobii Academy.

Eye tracking technique

Video-based pupil and corneal reflection eye tracking with dark and bright pupil illumination modes.  Two cameras capture stereo images of both eyes for robust accurate measurement of eye gaze and eye position in 3D space, as well as pupil diameter. 

Eye tracking mode

Tobii Pro Spectrum has four different eye tracking modes for different groups of primate species: Human Great ape Monkey Small monkey

Sampling frequency

60 Hz, 120 Hz, 150 Hz, 300 Hz, 600 Hz, or 1200 Hz (max. frequency depends on hardware version) 


Head supported² 0.01° RMS at optimal conditions (applying Savitzky-Golay filtering, settings listed in the test report) 0.06° RMS at optimal conditions (raw signal)

Head free-to-move³ 0.02° RMS at optimal conditions (applying Savitzky-Golay filtering, settings listed in the test report) 0.08° RMS at optimal conditions (raw signal)


Head supported² Down to 0.15° P₅₀: 0.30° (P₂₅: 0.23° - P₇₅: 0.41°)

Head free-to-move³ Down to 0.17° P₅₀: 0.43° (P₂₅: 0.32° - P₇₅: 0.6°)

Binocular eye tracking


Eye tracker latency

Mean latency < 2 ms @ 1200Hz (SD < 0.2 ms)⁴ 

Blink recovery time

1 frame (immediate) 

Gaze recovery time

Less than 150 ms

Data sample output

Timestamp Gaze origin Gaze point Pupil diameter 

Eye openness data stream

Eye openness stream has the same frequency as frequency selected for the gaze stream and will have the same timestamps. Eye openness data is provided in millimeters, for each eye individually.

Eye image data stream

Eye image stream frequency is approximately 10 Hz (one image with both eyes). 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 between the eye tracker time domain and the client computer time domain with an accuracy of 100 µs

User calibration

Binocular, Monocular

¹Tobii uses an extensive test method to measure and report performance and quality of data with human participants. Please download the test report for more detailed information. To learn more about Monkey mode and Great ape mode data quality, please contact your Sales representative.²Head supported specs are measured with 20 participants under optimal conditions and chinrest. Values represent the average for the entire screen area. Download Tobii Pro Spectrum Laboratory Metrics Test Report to read the full report.³Head free-to-move specs are measured with a sample of 400+ participants without any head restriction. The setup and test environment are selected to represent normal usage and illustrate the performance of the eye tracker with a variety of participants and for the entire screen area.⁴Visit Tobii Connect for more information on how to optimize your Pro Spectrum setup. Note: Firmware v.2.2.3 and Tobii Pro SDK v.1.9 or later are required to obtain the stated performance.

Head movement tolerance

Dual-camera system, with more images than a one camera system, gives a more accurate data calculation and the best level of precision and robustness for head movement. 

Operating distance (mounted on screen)

55 to 75 cm (22" and 30") from the eye tracker 

Freedom of head movement (width x height)

Freedom of head movement at 65cm distance 34 cm x 26 cm (13.5" x 10")

Freedom of head movement at 75cm distance 42 cm x 26 cm (16.5" x 10")

Optimal screen size

Up to 24" (16:9 aspect ratio)

Recommended monitor

Supplied 23.8" monitor 

Tracker setup options

Eye tracker unit can be used alone or together with the monitor or other screens.

Can also be used with real-world stimuli.

Tracker mounted on stand, allows for even larger screens and physical objects to be tracked.

Participant setup

Very simple and easy. Typically, less than 1 minute.

Software and framework compatibility

Tobii Pro Lab 
Tobii Pro Eye Tracker Manager 
Tobii Pro SDK 
Any applications built on the Tobii Pro SDK 

Operating system

Windows, macOS, Linux

Hardware versions

300 Hz 
600 Hz 
1200 Hz 

Dimensions (L x H x W)

55 cm × 18 cm × 6 cm (22" × 7" × 2")
The eye tracker is mounted on a stand, which raises it from the surface by 9 cm (approximately 4")


5.1 kg (11.4 lbs.)
With the power supply unit, the weight is 5.7 kg (12.9 lbs.)


TTL input: 8-bit (DB-9 connector) 
Communication: Ethernet (RJ-45 connector) 
Power supply: 24 VDC (5.5 mm connector) 

Data Processing

Fully embedded data processing 

Eye tracking cameras



Dark pupil illumination modules
Bright pupil illumination modules 

Power consumption

Typical power consumption: 60 W 
Max. rated power consumption: 96 W 

Power options

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)



3.8 kg (8.4 lbs), incl. mounting

Aspect ratio



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) 



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