Instantaneous pressure switch under a step staircase - where to buy?

Hello,
i have been looking for some time for something like a switch to mount under a step stair. Some sort of pressure mat or something similar. The switch is to be a momentary NO switch. I am getting tired of searching to no avail. Maybe some of you colleagues have a ready-made solution, a link to a ready-made product?

ps. Any motion detectors have failed for me, unless someone knows where to buy a detector that has no hold when motion is detected just short circuits "momentarily".

Regards

Welcome,

you are right, the motion detector itself does not give information about the extinguishing of the light, therefore in such a case a timer for lighting is necessary. If we have such a switch connected to a motion detector and we set the motion detection for e.g. 1 minute, then if there is no motion within 1 minute, the light will switch off.

I hope that I have helped you; if you are looking for a ready-made solution, please visit www.wekta.com.pl and familiarise yourself with our automation.

We didn't quite understand each other.... I just don't need the hold-up. It is supposed to work only in the field of view and disconnect immediately (just like a bell button).

You need to attach a monostable circuit to the detector. And what should happen if someone is constantly in the detector field or standing on the step?
You need to look for security mats or security devices for gates/ but it works the same as a detector, it holds the signal until the pressure disappears/.

To give you an idea of what is involved

I have installed stair lights in my house to be switched on when entering and exiting the stairs. The whole arrangement works nicely, but I have a problem with the automatic switching.
The lights are supposed to switch on at the entrance and exit of the stairs. Unfortunately, if I have a hold on the switch and manage to ascend from the bottom to the top, the controller will treat such an event as the entrance of a second person and will not extinguish my lamps one by one, but all at once. Hence I need preferably a ready-made solution.
Link to a video showing how it is done at my place:
https://www.youtube.com/watch?v=t4TZrK5xaTQ

Describe in literary terms how it should work.
You go up.
You go down.
One person goes up, the other comes down.
Remember that the sensor does not differentiate between directions.

I know what you mean. But you are writing about a switch under the step. If the step is movable then there is no problem. Otherwise it's a photobarrier. One for electric gates will meet your requirements.

With this barrier it's a cool idea. As for the moving stage, it's all good, but what kind of switch to use under it? So that it has arms and legs. I also have no idea how to mount this step so that it doesn't "rattle" over time

if you have the possibility to "chisel" a hole of approx. 5 cm in the wall, I recommend:
Sensor E18-D80NK.
It works great for me.

i suggest using a piezo sensor.
They are cheap (£1-2) and can be connected to an arduino.

Perhaps a pressure mat?