- PRC Krochma
- hotometer, radiometer, goniophotometer, standards, luxmeter, sphere photometer.
- Address:Am Sandwerder 47, Berlin, Germany,14109
- X-Rite GmbH OPTRONIK
- goniophotometer, retroreflectometer, colorimeter, illuminance meter, luminance meter, software, integrating sphere, luminance standard, standard bulb.
- Address:Kaiserin-Augusta-Allee 16-24, Berlin, Germany, Germany
- PRC Krochmann
- photometer, radiometer, goniophotometer, standards, luxmeter, sphere photometer.
- Address:Am Sandwerder 47, Berlin, Germany
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