Webinar UV-C

14.05.2020, Nichia, LUMITRONIX

LUMITRONIX LED-TECHNIK GMBH

UVA/UVB/UVC experienced Development & productionof LED modules (OEM)

65 employees in HechingenNichia distributor

since 2011

UVC radiation

• 200- 280nm wavelength

• Fully absorbed by earth atmosphere

• Inactivation of bacteria and virus

• Inactivation due to effect on nucleic acid and amino acid

• Specific radiation spectrum has a big impact on the efficacy

• UV dose in mJ/cm² for the specific germ is relevant, lists of

research results available*

* https://iuvanews.com/stories/pdf/archives/080104Cairns_Article_2006.pdf

Spectral sensitivity

• Goal: Achieve a sufficient UV dose in mJ/cm²

• Spectral sensitivity of germ needed

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Spectrum efficacy Escherichia coli

Aia1 Aia2

LED spectrum

• LED spectrum 1: Peak wavelength 280nm

• LED spectrum 2: Peak wavelength 275nm, -48% efficacy

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LED Spectrum of two different LED types

Aia1 Aia2 LED Spectrum 1 LED Spectrum 2

Weigthed LED spectrum

• LED spectrum 1: +52% more efficient

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Spectrum efficacy Escherichia coli

Aia1 Aia2 LED Spectrum 1 LED Spectrum 2 LED Spectrum 1 weighted LED Spectrum 2 weighted

Working distance

Ledil Oy, optics for UV applications

UVC LED module

• Stainless steel case

• Coated glass reflector

• Quartzglass cover (92% transmission)

• IP68 protection

• Fiber gaskets

• 50mW optical output

• 280nm

• Viewing angle: 13.5°

• 350mA, 5.2V = 2.9W

• Passive cooling

• L70B50 > 8.000h

Datasheet will be published within a few days

Effective UVC dose

• Illuminating distance: 5-21cm

Example: Escherichia coli, 0.7-3mJ/cm² *

Illuminance weighted with spectral sensitivity

* DIN 5031-10: 2018-03

Distance mW/cm² Area d=

Seconds

@3mJ/cm²

5cm 0,83 7,2cm 3,6

10cm 0,6 8,5cm 5,0

20cm 0,36 11cm 8,3

Driver & safety

• WHO warning 2020

• Photobiological safety DIN EN 62471-2009

• ICNIRP Guidelines (2004)

https://www.who.int/images/default-source/health-topics/coronavirus/myth-busters/mb---uv-light-edited.png?sfvrsn=14c7467d_2

Driver & safety

• Saftey button (eg in a door)

• Osram Motion Sensor for safety (60 sec)

• External Switch

• 0-10V brightness adjustment

• PowerController CC, 350mA

• PowerController UVC

• ERP VLM40E-48-T

• 3 status LEDs of different color

Driver & safety

• Saftey button (eg in a door)

• Osram Motion Sensor for safety (60 sec)

• External Switch

• 0-10V brightness adjustment

• PowerController CC, 350mA

• PowerController UVC

• ERP VLM40E-48-T

• 3 status LEDs of different color

Driver & safety

• Saftey button (eg in a door)

• Osram Motion Sensor for safety (60 sec)

• External Switch

• 0-10V brightness adjustment

• PowerController CC, 350mA

• PowerController UVC

• ERP VLM40E-48-T

• 3 status LEDs of different color

Driver & safety

• Saftey button (eg in a door)

• Osram Motion Sensor for safety (60 sec)

• External Switch

• 0-10V brightness adjustment

• PowerController CC, 350mA

• PowerController UVC

• ERP VLM40E-48-T

• 3 status LEDs of different color

Wiring diagram