Is the laser that I am using dangerous?

Laser users should be aware of the risks involved with their equipment. Not all lasers present the same hazards. Proper understanding and training of the particular laser being used, and its dangers, is necessary to avoid injury.

Lasers with visible beams are categorized into four classes.

Class 2
These relatively weak lasers are not a skin or burn hazard. They do not cause eye damage unless someone stares directly at the beam.

Class 3R
These low powered lasers are not a skin or burn hazard. Laser protective eyewear is generally not necessary.

Class 3B
These lasers are not a skin or burn hazard. Laser protective eyewear appropriate for the beam’s power and wavelength is recommended.

Class 4
These lasers can burn skin and cause permanent scarring. Some types of material will burn. Laser protective eyewear is essential.
Infrared lasers, used commonly in industrial settings, pose invisible risks to the user. The eyes cannot detect infrared, so they must always be protected from exposure.

Federal Codes of Regulation (CFR) in the US and IEC codes internationally define laser classes and impose required safety regulations. They mandate manufacturer warning labels and outline specific safety measures for laser operators. American National Standards Institute (ANSI) provides control measures for laser hazards in the US. For example, ANSI Z136.3 provides guidance for the safe use of lasers in health care. ANSI Z136.9 provides standard policies of safe use of lasers in manufacturing environments. EN is the European standard.

Certified Laser Safety Officers (CLSO) ensure that compliance with all standards are being met. They can recommend appropriate laser safety eyewear and signage that warns that lasers are in use. Window coverings, such as laser curtains, blinds, or shutters must be in place to prevent laser radiation from escaping through the glass.

RT Technologies can provide CLSOs for consulting services and laser safety auditing. We also offer customized laser safety training courses. RT Technologies offers accredited testing for all laser products and provides US and international laser product certification and registration services.

Is my laser OSHA compliant?

The Occupational Safety and Health Administration (OSHA) was created by Congress as part of the Occupational Safety and Health Act of 1970.  The purpose of OSHA is to assure safe and healthful conditions in the workplace.  OSHA sets and enforces safety standards, as well as providing training, education, and assistance.  Most private employers and their employees in the U.S. and its territories are covered by the OSHA act.

OSHA CompliantOSHA mandates specific standards for laser safety.  The standards recognize hazards to the eyes and skin from exposure to direct or reflected laser beams as well as fire hazards.  Unprotected exposure to lasers can lead to permanent eye injury and serious burns.  Full OSHA standards for laser system compliance can be found at www.osha.gov.

Federal law requires lasers and laser systems to be classified and labeled by the manufacturer.  These classifications provide a warning to the user of the hazards associated with the laser’s radiation.  The product should be clearly labeled.  There are four classifications of lasers based on potential hazards from exposure.

Specific laser safety products must be used in the workplace to protect against hazardous exposure.  Certified industrial laser enclosures have laser containment systems.  Laser beam shutters and beam dumps are designed to prevent accidental exposure.  They are generally controlled by a laser interlock control system that can be operated manually or automatically.  Laser blinds, curtains, and screens provide a physical barrier to prevent radiation from escaping through windows.  These safety products are often used in hospitals, labs, and production facilities.  They should be labeled for compliance standards, which may include U.S. ANSI specification or EN or CE Marking (European Conformity).

Laser safety eyewear comes in a variety of styles including glasses and goggles.  Lenses may be glass or polycarbonate.  Eyewear should be chosen to block the appropriate wavelength and optical density of the laser beam.  The laser’s operating manual may list recommended eyewear.  Eyewear should also meet ANSI or CE requirements.

RT Technologies can provide Certified Laser Safety Officers (CLSO) for consulting and to provide laser safety auditing services.  RT Technologies also offers customized laser safety training courses that are eligible for American Board of Industrial Hygiene (ABIH) credit.

Do you offer a sign I can customize with my own wording?

YES—All of RT Technologies LED Signs can be delivered with a custom display.  The LEDS MiniULTRA 470, 580 and 790, Illuminated and the SLIM JIM signs can all have customer specific displays configured.  There is a one-time charge for each specific display message (subsequent signs ordered with that specific message do NOT have to pay the customization fee!)

Do you offer a sign that will work with a bathroom light switch?

Yes we do!  Our Slim Jim sign can be hard wired (110V) to the light switch for your bathroom.  When someone turns the light on – the sign will come on.  When they turn it off, the sign will turn off.  Some of the occupancy messages we offer for Slim Jim signs are as follows:

  • In Use
  • Occupied
  • Room In Use
  • No Entry
  • Do Not Enter

We can also create a custom message for a one time fee.  Please contact us and let us know how we can help with your project.



Do you have a waterproof LED sign for outdoor use?

Yes we do!

Outdoor Weatherproof LED Sign

Weatherproof LED Sign

RT Technologies carries the Ultra 580 IP66, an outdoor sign that has dual messaging capability.  A customized message can display in red, and then a second message can display green.  For single messages, in addition to red and green, other colors (Blue, White, Yellow, Pink) are available.  All messages are secret until lit.  Outdoor signs must hold up in harsh weather conditions.  The Ultra 580 IP66 is designed to withstand wind and rain, successfully keeping out water droplets even when subjected to powerful water jets.  It is also sealed to prevent the ingress of dust.  Dirty screens are harder to read, and dust and dirt may reduce light output.



If your business is considering installing or replacing outdoor signage in 2019, consider upgrading to a weatherproof LED sign.  It can provide a good return on investment in just a short time.