Conclusion:

With this repeater from Neo Coolcam you can extend the range of your Z-Wave network. This repeater can act as a hub. Your motion sensor will then no longer communicate directly with your smart home controller, but via this repeater.

This gives you a better range and you can also operate most distant devices.

As an extra, this repeater has a built-in temperature and humidity sensor. You can of course combine this nicely with the heating or controlling a fan.

This repeater is nice and compact and the addition is useful if you are going to add it.

It is for sale for around 40 euros, which does not make it super cheap, because you could always opt for an intermediate plug. This can also act as a repeater.