UV transilluminators manufactured by UVP

It has been identified that Ultraviolet (UV) transilluminators, manufactured by UVP, may emit UV radiation without indication (warning).

UV light was found to be emitted at all settings, other than when they are set to emit white light, and not just at the specific UV wavelength settings marked on the equipment dial.
So far this issue has been identified on UV transilluminators manufactured by UVP, but could also affect other brands. 

Action to take

UV transilluminators should be replaced, wherever practicable, by blue-light illuminators and appropriate dyes.

Where this is not possible the following should be implemented:

1. If the transilluminator lid or shielding is damaged in any way, the equipment must be taken out of use immediately.
2. When not in use, ensure that transilluminators are completely switched off at the power button. 
3. To protect the operator and other persons in the vicinity, work must always be carried out with a suitable shield that protects the front, sides and rear of the transilluminator.  Perspex (grade CS VE) is an appropriate shielding material.
4. As a minimum operators should wear a lab coat with cuffs, personal protective eyewear (compliant with BS EN 170) and nitrile gloves (vinyl gloves should not be worn as they do not provide sufficient UV protection.) 
5. If it is not practicable to completely shield the transilluminator (e.g. because sample manipulation or cutting is required) then: 
6. The transilluminator must not be used in a shared laboratory. 
7. All persons present must wear PPE to protect the eyes and face (e.g. a full-face visor) which meets BS EN 170 
8. All persons must cover exposed skin and take care to cover areas often missed, such as under the wrists, under the chin, and chest.  
    

UV Radiation

UV radiation is invisible and can be harmful to the skin and eyes.  Transilluminators emit hazardous levels of UV radiation which can cause painful eye inflammation and skin burns in a matter of seconds.  Chronic exposure can also lead to an increase in the likelihood of skin cancer and the formation of cataracts.

Further guidance

Safety Services will be releasing specific safety guidance on UV transilluminators in the near future. 

Contact lasersafety@ucl.ac.uk 
   
Departments that use UV transilluminators must ensure they are adhering to the UCL Artificial Optical Radiation Safety Standard.

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