Ulisem 4Pcs Leather Hole Punch Sewing Tools, Prong Lacing Perforate Leather Craft Claw Hole Sewing Tools (1+2+4+6 Teeth)

Can be used to detect the liquid level in a tank; easy to use.

A level sensor is a device used to detect the liquid level in a tank; it can activate a pump, display, alarm, or other device.

Use it with hydroponics, saltwater tanks, freshwater tanks, gardening, aquariums for controlling the electric head, pet bowls, fish ponds, filtration, heating, etc.

This liquid float switch can be installed as a normally closed/normally open switch as needed.

Switching voltage (max.): 100V DC; switching current (max.): 0.5A