Preventing Electrical Fires Through EyeCap Color-Changing Products

Fire safety is an increasing concern all over the world. The first line of defense for electrical fire protection at industrial companies should be EyeCap. At first glance, the EyeCap allows you to prevent electrical fires and verify completion of electrical wire connections.

Understanding the Need for EyeCap Products

Maintenance can be time-consuming. The main concern involves fixing problems in a short span of time. EyeCap is a cutting edge technology that reduces time, labor, and costs involved in industrial oversight and damage prevention. The color change can be easily detected with the naked eye and helps in reducing time spent identifying the problem. It also increases efficiency by 5 times and has an 80% cost reduction.

When the heat from electrical connections starts to exceed 80 degrees Celsius it often results in damaged components. At that point, the PVC surrounding the electrical wires will begin to degrade and create gas. Furthermore, the heat buildup will create smoke at the connecting point between the electrical wire and the lugs or terminals. As the heat passes the ignition point, the electrical wire terminal will begin to create electrical arcs which will eventually cause a fire. This is one of the main reasons to use EyeCap products, they help assemblers to easily identify faults.


EyeCap Color Change

The Features of EyeCap

  • Fire Retardant
  • Electrical Insulating
  • Electrical Arc Preventing
  • Temperature Sensitive
  • Color Changing cap
Three EyeCap Colors Undergo Heat Testing

Technique Behind Fire Prevention

The EyeCap allows you to prevent electrical fire and to confirm completion of electrical wire connections. This cap is made of temperature sensitive material and its color will turn to white when the temperature reaches 60 degrees Celsius. When the temperature drops below that point, the color will return. Because of the ease of detection, workers, supervisors, inspectors and others can quickly take necessary actions to respond in case of imminent danger.

How Does it Work?

The EyeCap is made of temperature sensitive material and the color will turn to white once the temperature reaches 60 degree Celsius. In the above diagram, the picture has been captured at three time slots. At the initial stage, the EyeCap color is red when the temperature is less than 60 degree Celsius. Slowly it starts changing to white as the temperature reaches around 60 degree Celsius. Finally, it turns completely white when it reaches 70 degree Celsius.

EyeCap in Use

Imagine the Possibilities

Are you interested in reducing costs and creating a safe environment in your industry? EyeCap will help you avert electrical fires, monitor heat generation of electrical wire terminals and even help in verifying complete electrical wire connections. The EyeCap is designed in a way that the labeled transparent body allows you see and check the actual electrical wire connection.

Contact Elizabeth Brill at Compass for samples.

P: (510) 661-6612                                  

Link to Specification Sheet:

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Free Electron Laser (FEL) Glossary

To help our audience better understand common and complex terms associated with Free Electron Lasers, we’ve created a detailed FEL Glossary to define key words and phrases. We encourage readers to use this Glossary as a technical resource, and to let us know if there are any other terms they’ve come across that would be beneficial to add.

  • Accelerator

A device used to produce high energy beams of charged particles such as electrons, protons or heavy ions for research in high-energy, nuclear physics, synchrotron radiation research, medical therapies and some industrial applications.

Picture Source: Paul Scherrer Institut (PSI





  • Beam power

A result of the combination of particle energy and beam current.

  • Betatron Oscillations

This is the wavelength of the transverse oscillation of a beam, which is measured in meters. Quadrupole magnets focusing in the vertical and horizontal planes create a restoring force for the Betatron oscillations. Therefore, horizontal and vertical betatron oscillations are possible. Beta is a Twiss parameter.

  • Bremsstrahlung radiation

Known as “Braking Radiation”, Bremsstrahlung Radiation is given off by a charged particle (e.g. electron) due to its deceleration when deflected or slowed by an external source typically an atomic nucleus. Synchrotron radiation, cyclotron radiation and beta decay are examples.  The deceleration may occur immediately following an acceleration, by a nucleus for example.

Picture Source: SlideShare







  • Coherent light

Light waves with identical wavelength (monochromatic) and that are in phase with one another.

Picture Source: Laserf




  • Cyclotron Radiation

Electromagnetic radiation resulting in highly energetic particles deflected by a magnetic field.

Picture Source: Gemini Observatory







  • Electron Volt (eV)

Unit of energy in physics, equal to energy gained by the charge of an electronmoving across a potential of one volt. Units of MeV and GeV (mega electron volt and giga electron volt) are commonly used to measure electron beam energy.

1 eV=1.60217657*10^-19 J

  • Free Electron Laser (FEL)

A type of laser whose lasing medium is a high-energy electron beam moving freely through a magnetic structure.

Picture Source: EPFL






  • Field Emission

Electron extraction from a material that occurs due to an external electric field.

  • Gain

A process where an external medium transfers energy to electromagnetic radiation.  It is considered as a measure of the capability of the medium.

  • Injector

The source of beam particles into the accelerator structure. In the case of Free Electron Lasers, the beam particles are electrons.

Picture Source: Paul Scherrer Institut (PSI)





  • Insertion Device

A device consisting of an array of alternating magnets that is inserted into a beamline to produce synchrotron radiation by forcing a charged particle beam to oscillate as it passes through the device.

  • Laser (Light Amplification by Stimulated Emission of Radiation)

Device that generates an intense beam of coherent light by stimulated emission of photons from a lasing medium.

Picture Source: pixabay





  • Linac

An abbreviation of “Linear Accelerator,” which accelerates charged particles in a single pass along a straight trajectory through a linear accelerating structure.

Picture Source: jeffersonlabs





  • Magnetic Dipole

A closed  loop of an electrical structure or the elemental construct of a magnet with dimensionless north-south poles.

Picture Source: Wikipedia







  • Relativistic Kinetic Energy

The excess of the particle energy over its rest mass energy, as given by KE = mc2 – m0c2, where m0 is the rest mass of the particle.

  • Relativistic Electrons

Electrons moving at desired accuracy speed and acting as a lasing medium in a free electron laser.

  • Saturation

The process or state that occurs when a material property is at its maximum level.

  • Seeding

Achieved when a photon pulse of desired wavelength is overlapped transversely and temporally with electrons in undulator to start up FEL process.

  • Storage Ring

A portion of a system (e.g. FEL, Particle Collider) used to store and maintain electron beam characteristics after the acceleration device.

Picture Source: GotScience Magazine







  • Synchrotron Oscillation

A longitudinal oscillation induced in an accelerated electron bunch by the RF driving forces imparted to the bunch by cavities.

  • Synchrotron Radiation

A type of Bremsstrahlung radiation occurring when a charged particle such as an electron or positron is bent in a magnetic field, losing energy as photons (light) which follow a path tangential to that of the charged particle.

Picture Source: Wikimedia commons






  • Undulator

A type of insertion device designed to produce Coherent Synchrotron Radiation about N2 as bright as a bending magnet, where N is the number of magnetic dipoles, and is commonly used in a Free Electron Laser.

Picture Source: Physics Stack Exchange





  • Wiggler

A type of insertion device used to enhance electron bunching in a storage ring to create Synchrotron Radiation about 2N as bright as a bending magnet, where N is the number of magnetic dipoles.  Unlike an Undulator, the radiation generated from one dipole is not spatially coherent with that of the other dipoles.

Picture Source: Wikipedia







For more information or to request an addition to the FEL Glossary, please feel free to contact us via email at We look forward to hearing your thoughts and suggestions!

The Current State of Free Electron Lasers

Understanding the Foundation of Free Electron Lasers

Since the first free electron laser was introduced at Stanford University 41 years ago, there have been a number of experiments, developments, and new facilities for research aided by those decades of data and experience.

Combining a linear accelerator with a high precision insertion device and optical cavities formed by mirrors, free electron lasers are far different than their conventional laser counterparts. Instead of using bound atomic states (gases and solids) as the lasing medium, they utilize the electron beam itself. A free electron laser generates tunable, coherent, high power radiation and can be used to examine properties in the terahertz (THz), infrared (IR), visible, ultraviolet (UV), and X-ray wavelength regimes.

Celebrating Industry Successes

Booth at FEL 2017
Compass Manufacturing’s booth at FEL 2017

As the technology evolves, researchers regularly convene to discuss the latest advancements and trends in this sector. The 38th International Free Electron Laser (FEL) Conference was recently held in Santa Fe, where scientists recounted new findings and described new lasings at Pohang Accelerator Laboratory X-ray FEL in South Korea, the SwissFEL in Switzerland, and the Dalian VUV FEL in China. The Executive Committee also awarded special honors to the scientists of the Los Alamos National Laboratory for their developments in advanced materials science and Exascale-class computing.

The Latest Advancements in FEL

In September of this year, the Deutsches Elektronen-Synchrotron (DESY) in Hamburg unveiled the largest and most powerful X-ray free electron laser yet, the European XFEL. The XFEL creates ultrashort, intensely bright light pulses at a speed of 27,000 pulses per second, more than 200 times the rate of other X-ray lasers.

Researchers and other industry professionals hope that the new capabilities to examine atomic details in the nanoworld will unlock new discoveries, such as mapping the three-dimensional structure of biomolecules or finding new ways to extract energy from sunlight. The whole operation to plan and build the XFEL took more than 20 years. Other large-scale FEL facilities under development include the Institute for Plasma Research and Center for Advanced Technology in India, the Turkish Accelerator and Radiation Laboratory at Ankara, and the Paul Scherrer Institute’s SwissFEL.

Looking to the Future of FEL

The United States Navy believes that free electron laser technology could be the key to increasing their capabilities to track and deflect sky borne threats while also enhancing communications, targeting, and disruption capabilities. To bring this vision to life, the Navy has invested hundreds of millions into FEL science.

In addition to these investments, the U.S. Navy and other agencies associated with the  Department of Defense (DOD) and the Department of Energy (DOE) have expressed a need or desire to have private U.S. commercial and manufacturing partners as a national security consideration and so they may focus on their core competencies. Compass Components Inc. has been working to address this gap and was a major industry sponsor at the 38th International Free Electron Laser (FEL) Conference.

While there are still considerable challenges to realize the full possibilities of these lasers, the breadth of intellectual interest and financial commitment suggests a bright future.

Want to learn more about the current state of Free Electron Lasers? Contact us at or by calling 1-800-622-2261.

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