The AMETEK Float Switch family is made up of model series F8300, 610XXX and8TJ143XXX. These devices open or close an electrical circuit at a predetermined level of liquid. They have been developed primarily for use in aircraft fuel and lubrication tanks but are equally suited for many industrial applications in remote and non-accessible locations where liquid level control is important. Various installation modifications of the unit can be used to determine when a tank is filled to capacity, to indicate when a specific amount of liquid has been expended, or to indicate when a predetermined level has been reached. Switches are designed for use with liquids under MIL-F-5572, MIL-F-5616, MIL-F5624, MIL-L-7808, and MIL-L-23699 throughout a temperature range of -65O to 275O F, but may be used with most other liquids.
Typical AMETEK Float Switches consist of three major parts: the body assembly, float assembly, and shell. The body assembly contains the mounting flange, mounting fitting, and a hermetically sealed, magnetically-operated reed switch, potted in a sealed tube extending through a hole in the float assembly. The float assembly, fabricated from a variety of nonmetallic materials, contains permanent magnets and is protected by an aluminum outer shell which prevents random operation caused by “sloshing” liquid. Lead wires, of a length to suit specific applications, complete the unit.
AMETEK switches are designed to conform to the applicable requirements of Military Specifications MIL-E- 5272A and MIL-F-8615, including the following tests:
- High Temperature (Wet)
- External Leakage
- Moist Fungus
- High Temperature (Dry)
- Low Temperature
- Salt Spray