The image shows a pile of blue float switches with black cables. The branding on the devices says **'Gelzon'** and mentions **'ISO 9001:2015 COMPANY'**, indicating that the company adheres to a quality management system standard.
### What these are:
These appear to be **liquid level float switches**, which are used to detect the level of liquid within a tank or container. They are commonly used in:
* Water tanks
* Sump pumps
* Industrial fluid containers
* Sewage systems
When the liquid level rises or falls, the float activates a switch to turn on/off a pump, valve, or alarm.
Let me know if you want help with:
* Installation guidance
* Wiring diagrams
* Product specifications
* Buying sources for these switches
