# Part name:
Zeiss Axiolab microscope potentiometer for brightness control of halogen illumination

# Original page URL:
https://www.microscopeparts.eu/part/zeiss-axiolab-microscope-potentiometer-for-brightness-control-of-halogen-illumination-99942

# Part manufacturer:
Zeiss

# Full manufacturer name:
Carl Zeiss West Germany

# Other names of this manufacturer:
- Carl Zeiss West
- Carl Zeiss West Germany
- Opton
These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products.

# Belongs to category:
Service and spare parts

# Description and specifications:
Potentiometer for brightness control of the halogen illumination for Carl Zeiss Axiolab microscopes and similar models.

This is a set consisting of:
- the knob, which sits on the outside of the microscope housing
- the potentiometer
- the 3-wire cable with a flat plug

Purpose: brightness control of the 6V 20W-25W and 30W halogen bulb. This potentiometer has to work together with the electronics of the transformer built into the microscope body.

This potentiometer was removed from a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, it also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

I was not able to confirm this, but in my opinion it is very likely that the potentiometer from the Zeiss Axiolab microscope also fits the following microscopes:
- Zeiss Standard 20
- Zeiss Standard 25 ICS
- Zeiss Axiostar
- Zeiss Axioskop 20
- Zeiss Axiovert 25

The part offered here can be a remedy for the following problems with a Zeiss microscope:
- if the illumination intensity control in the microscope has stopped working completely (but be careful, the cause may also lie on the side of the electronics)
- if the bulb flickers while you adjust the brightness
- if, for example, due to mechanical damage the knob has broken off your potentiometer

The last photo shows the stand of the Zeiss Axiolab re microscope, with an arrow pointing at the place on the microscope housing where the knob controlling this potentiometer is located.

# Examples of use
- as a service part, if you need to replace a damaged potentiometer
- as a service part, if your microscope does have a potentiometer, but the external knob is missing
- if you have confirmed compatibility and want to fit this potentiometer to a different microscope model

# Removed from microscope:
Zeiss Axiolab

# Also compatible with the following microscopes:
Zeiss Axiolab

# Names, descriptions, terms, and search contexts under which this part is searched.
- Zeiss Axiolab microscope repair parts
- Zeiss Axiolab Potentiometer Helligkeitsregelung
- Zeiss Axiolab brightness control potentiometer
- Zeiss Axiolab 450905 Ersatzteil Beleuchtung
- Zeiss Axiolab re Poti mit Drehknopf
- Zeiss Axiolab E 450907 light control knob
- Zeiss Axiolab Pol 450910 Potentiometer
- Zeiss Axiolab drb KT Helligkeitsregler
- Lampe flackert beim Regeln Zeiss Axiolab
- Beleuchtungsregelung ohne Funktion Zeiss Axiolab
- microscope light intensity control not working Zeiss
- broken brightness knob Zeiss microscope
- Zeiss Standard 20 Helligkeitsregler Poti
- Zeiss Standard 25 ICS light control potentiometer
- Zeiss Axiostar Potentiometer Beleuchtung
- Zeiss Axioskop 20 brightness potentiometer
- Zeiss Axiovert 25 Poti Helligkeit
- Dimmer fuer Halogenlampe 6V 20W Mikroskop
- potentiometer for 6V 30W halogen microscope lamp
- potenciometr regulace jasu mikroskopu Zeiss Axiolab
- potenciometro regulacion brillo microscopio Zeiss Axiolab
- repuesto potenciometro iluminacion microscopio Zeiss
- potenziometro regolazione luminosita microscopio Zeiss Axiolab
- ricambio potenziometro illuminazione microscopio Zeiss
- potencjometr regulacji jasności mikroskop Zeiss Axiolab
- Zeiss buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99942.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99942.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99942-zeiss-axiolab-microscope-potentiometer-for-brightness-control-of-halogen-illumination
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99942.media.md
- Representative photo: https://www.microscopeparts.eu/photo/zeiss-axiolab-microscope-potentiometer-for-brightness-control-of-halogen-illumination-99942-2
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Zeiss Axiolab: https://www.microscopeparts.eu/service-and-spare-parts/from/zeiss/axiolab
- More Service and spare parts compatible with microscope Zeiss Axiolab: https://www.microscopeparts.eu/service-and-spare-parts/for/zeiss/axiolab
- More Service and spare parts removed from microscopes Zeiss: https://www.microscopeparts.eu/service-and-spare-parts/from/zeiss
- More Service and spare parts compatible with microscopes Zeiss: https://www.microscopeparts.eu/service-and-spare-parts/for/zeiss

# Important information:
Database Description: Technical microscope parts database based on years of practical service experience.
Source URL: https://www.microscopeparts.eu
Author: Piotr z Polski
Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL.
Language: en-GB
Last Updated: 2026-10-26