Lamp Tester MK 9994 The lamp tester MK 9994 and MK 9995 of the INFOMASTER series contains a diode group with either common anode or cathode. It blocks one lamp from the other in order to avoid influence. On AC-operation the lamps are only half illuminated. Features . For max. 11 indicator lamps . Width 22.5 mm Technical specifications Width: 22,5mm Enclosure design: Switch cabinet Type: MK 9994 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: MK9994 Art. No.: 0012938