05/29/2006 • Machine safety, industrial safety • Process technology / Maintenance

Change of a generation

The professional circle – not just limited on NDE – dreamed about it since a long time past. Now these dreams became true. A new series of portable black light lamps has been developed, suitable above all for mobile applications. This is owing to the use of black light emitting diodes (UV-LED`s), which made it able to develop black light lamps of hand torch size due to their small dimension as well as low power demand.

Diodes for illumination purposes are on the advance for some time. We are daily meeting such diodes as light sources for the visible spectrum of light (400 nm up to 700 nm) e.g. in lamps of motor vehicles or at bicycles. In the meantime, diodes with a spectrum of emission below 400 nm (UV-LED`s), i.e. in the range of black light have been developed for different purposes. Thus they were getting point of interest for a lot of further applications (such as material testing, research, welding and criminalistics) especially there, were spontaneous, mobile application is demanded.

Now UV-LED`s have entered into the delivery program of Helling GmbH – as sources of emission in UV-hand lamps. These UV-lamps, with an emission in the range of UV-A, are especially offered for use in conjunction with fluorescent inspection media, i.e. with magnetic particle and penetrant inspection, but also for use in other fields of application, as mentioned above. Compared with conventional mains-operated UV-hand lamps which are equipped with black light sources like mercury arc bulbs, UV-LED-hand lamps have the following advantages:

• low power demand
• long durability (about 10.000 hours)
• small dimensions
• immediate readiness for operation
• narrow spectrum of emission within UV-A-range
• independent of mains through battery- or accu-operation
• no troublesome cables, transformer etc.
• everywhere applicable (even inside containers and in areas with explosion-protection requirements)
• special suitability for often changing applications

Due to these advantages the UV-LED-hand lamps have got to be like “pikes in a fish pond”!

When using an UV-hand lamp of this new generation you may no longer pay attention to sentences in standards and/or job instructions like: “The UV-A-bulb shall be switched on several minutes before the beginning of the inspection (generally min. 5 minutes), in order to ensure the required UV-intensity” (EN ISO 9934-1, paragraph 10.2), as UV-LED`s are ready for operation directly after turning on! That means you may no longer put up with this waiting period which generally means 5 to 10 minutes. This amount of time can be added to the total inspection time, as long as the inspection is not already completed within the waiting period!
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Helling GmbH

Spökerdamm 2
25436 Heidgraben

Phone: +49 (0) 4122-922-0
Fax: +49 (0) 4122-922-201