This is description of this part:
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.
What is this part needed for?
- 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
