Auro controls pvt ltd. Manufactures unit for level controlling devices and electrical & electronic components for domestic and industrial applications. Cynergy3 components ltd. Offers an assortment of liquid level sensors. Being a part of that the rsf30 series of float switch are a range of general purpose, high power side entry devices. They are made from nylon and polypropylene, these devices can be easily configured to achieve normally open or normally closed operation by simply rotating through 180°. Key features of rsf30 series float switches are: