Why our magnifying lamps run on extra-low voltage
Put an older magnifying lamp next to a current one and you notice a difference: the cable used to run straight into the lamp, today there is a power supply in between. That is not a cost-saving measure but a deliberate safety decision – and the real reason behind the generation names MKII and MKIII.
The problem with mains-powered work lamps
A magnifying lamp is constantly being moved: pulled closer, swung aside, repositioned. The connecting cable goes through every one of those movements. On a device running directly on 230 volts mains voltage, that is a risk: under heavy mechanical stress the mains cable can be damaged – up to the point where live conductors are exposed.
That is not a theoretical scenario but the normal case for a device that is moved a hundred times a day.
Our conclusion: the move to external power supplies
We have progressively converted the power supply of all our magnifying lamps to GS-certified external power supplies. As a result, only harmless extra-low voltage now reaches the lamp itself – 20 or 24 volts, depending on the series.
Three advantages follow from that:
- Personal injury is ruled out. There is no longer any mains voltage on the moving cable.
- Markedly reduced interference emission. Relevant wherever sensitive electronics work nearby – inspection stations, laboratories, electronics workshops.
- The power supply can be replaced. If it fails, the whole lamp does not have to be sent in.
What MKII and MKIII mean
| Generation | Power supply | Replaceable power supply? |
|---|---|---|
| MKII | transformer inside the device, 230 V on the connecting cable | no |
| MKIII | separate GS-certified power supply, extra-low voltage at the device | yes |
The designation "MK" simply stands for a revised version. The step from MKII to MKIII is the most significant one, though: it concerns safety.
What this means for you in practice
You have an MKII model and are looking for a replacement power supply
With the MKII there is none – the transformer sits inside the device. Get in touch with us and we will see what can be done.
Your power supply has failed
The correct values are on the rating plate on the device. Pay particular attention to whether your model runs on 20 V or 24 V – the plugs look identical.
You work at a measurement-sensitive station
Then the reduced interference emission of the MKIII models is an argument that goes beyond mere comfort.
