Home » Products » Hardware » Response Devices » Celeritas Fiber Optic Response System
Request a Quote for Celeritas Fiber Optic Response System
  • Overview
  • Features
  • Requirements
  • Tech Specs
  • FAQs
  • Pricing
  • Support
  • Gallery

Celeritas® Fiber Optic Response System Overview

PST has engineered the new Celeritas Fiber Optic Response System to accurately gather participant responses and verify signals.


The new system can be customized to fit your research needs by selecting the combination of Button Response Units (BRUs) and Joysticks. The BRUs and Joysticks comfortably fit small to large hand sizes and are constructed entirely of non-metallic components - completely eliminating all metal inside the magnet room. The units communicate button presses through fiber optic cabling which connects to an Interface Console located in the control room through an available wave guide.


The Interface Console provides real-time feedback of participant responses via LED indicators and includes a set of buttons to make responses for the participant as needed. The system seamlessly integrates with E-Prime® through a USB connection. The new Interface Console comes with an Optical Connector and a BNC Connector. These connectors allow the computer to accept either an optical or an electrical TTL pulse that the stimulus presentation computer interprets as another button press, allowing the user to synchronize their experiments with the MR scanner.


The BRUs and Joysticks are assembled using chemical resistant, medical grade, biocompatible plastic. The chemical resistance allows for repeated cleaning without degradation of the material or color. The new BRUs include a tactile indicator to ensure correct finger placement during experiments. The new BRUs also give you the ability to adjust the wrist sled for a more comfortable fit.


The Celeritas Fiber Optic Response System can be customized with the following components:


  • Interface Console (includes Celeritas Monitor and Operator's Manual)
  • Right and Left hand Button Response Units - two, three, or five-button (includes 4-meter cable and magnet room wall mount holder)
  • Joysticks with omnidirectional analog stick and four buttons (include 4-meters of cable and magnet room wall mount holder)
  • 10-meter fiber cables (or 32.8 ft.)



Celeritas Interface Console


Celeritas Response Unit Options:




Five-button BRU


Three-button BRU


Two-button BRU









This product is intended for research use only.

Celeritas® Fiber Optic Response System Features

Celeritas BRU Features:

  • Ergonomic design
  • Wrist strap and adjustable wrist sled for a more comfortable fit and to reduce participant non-conformance (i.e., dropping the button units, participant losing finger positions)
  • Tactile indicator on index finger button to remind the participant of correct finger placement (five-button BRU only)
  • Molded from high-impact, chemical resistant, medical grade, biocompatible plastic
  • Contains no metal or conductive materials
  • Custom molded wall mount holder for BRUs and cabling


Celeritas Joystick Features:

  • Omnidirectional analog stick with four buttons
  • Comfortable ambidextrous design
  • Hand strap for comfortable positioning
  • Molded from chemical resistant, medical grade, biocompatible plastic
  • Contains no metal or conductive materials
  • Custom molded wall mount holder for Joysticks and cabling


Celeritas Fiber Optical Response System Features:

  • Thin, flexible cabling with easy-to-attach connectors
  • 10-meter (or 32.8 ft) cable with 10-meter extensions available
  • Electrical and optical scanner trigger connections
  • Supports any combination of BRUs and Joysticks on either hand
  • Displays responses on the front panel in real-time
  • External digital inputs and outputs for interfacing with third-party equipment
  • Connects as a standard USB keyboard and joystick (HID - Human Interface Device) when not using E-Prime
  • Ability to mask scanner trigger key responses when device is not in use
  • Can store ten custom key mapping profiles
  • Optimized for increased performance when used with E-Prime®


Celeritas Monitor Features:

  • User friendly interface for customization of BRU and trigger key mappings
  • Ability to create and store unlimited custom key mapping configurations to user-created profiles
  • Provides complete device status, feedback, and configuration information in a single, easy-to-understand window
  • Ability to hide scanner trigger responses when the device is not in use


Enhanced Features with E-Prime:

  • Ability to interact with the E-Prime 3.0 Button Device
  • Ability to customize responses and key mappings with the joystick
  • Automatically synchronizes with E-Prime's clock for improved response time accuracy
  • Ensures every response gets queued for increased reliability
  • Deterministic time-stamping of responses
  • Enhanced error checking of the Response Device status at run time
  • Remapping of Joystick Keys
  • Creation of Joystick zones
  • Portability of custom key mappings to any Celeritas Device (key mapping stored in es2/es3 file)


Celeritas® Fiber Optic Response System Requirements

Hardware Requirements:
  • Full speed USB port
  • Optical and BNC Trigger input (use only one at a time)


Minimum Recommended Waveguide Diameter:
  • Single Response Unit - 19.05 mm (.75")
  • Dual Response Units - 29.21 mm (1.15")


Celeritas Mode Software Requirements:
  • E-Prime 3.0/Windows 7, 8, and 10
  • E-Prime 2.0 SP1 or E-Prime 2.0 SP2/Windows XP, Vista, 7, and 8
NOTE: HID mode does not require E-Prime software. The Celeritas System will connect as a standard USB keyboard device.

Technical Specifications



Dimensions of Button Response Unit

Min Size 33cm x 12.7cm x 5.7cm
(13" x 5" x 2.25")

Max Size 35.6cm x 13cm x 5.7cm
(14" x 5.13" x 2.25")

Dimensions of Console 29cm x 26cm x 7.4cm
(11.42" x 10.24" x 2.91")
Cable Length
2 Fiber Cables: 10m (32.8') each Fiber Bend Radius: 2.08 cm (2")
Weight: .45kg (1 lb)
Cable Diameter/min 1 cm (.4")


Celeritas® Fiber Optic Response System FAQs

Q: Can I test an experiment from the control room of an MRI center?

A: Yes. You can test an experiment using the BRU console from the control room without having to go into the magnet room.


Q: Will I know if the study participant has fallen asleep or is not performing the task correctly?

A: Yes. The BRU console has an LED indicator for each button on the response units. You will be able to determine how the participant is responding at all times.

Celeritas® Fiber Optic Response System Pricing

Celeritas is available in our online store.

Please email us at sales@pstnet.com for more information or request a quote.

Celeritas® Fiber Optic Response System Support

For technical support please visit our Product Service and Support Website.

Celeritas Fiber Optic Response System Gallery

Privacy | Terms of Use | Terms and Conditions | Legal Trademarks | Authorized Use | Quality Policy
Copyright 2017 Psychology Software Tools, Inc. All Rights Reserved
Email: Info@pstnet.com | Telephone: 412.449.0078 | Fax: 412.449.0079