The L25 series level switch has been specifically developed to fill the need for a level sensor, capable of working reliably in applications in which metal level switches fail. Typical areas include chemical, process, pharmaceutical, scientific and agricultural uses, in which the metal components of traditional level switches either interfere with, or are attacked by, the liquids being handled.
Modern plastic and fiber glass tank systems are used extensively in agriculture, industry, and in commercial and domestic fluid handling. The L25 level switch has been specifically designed to integrate into plastic and fibber glass tank systems, and to enhance the advantages of such systems.
Total avoidance of metal components, in the fluid, has been achieved. In addition, an advanced friction less sensitivity adjusting system gives total external control over the switching threshold.
The L25 series level switches are made from glass reinforced polypropylene and glass coupled polycarbonate. Optional polypropylene switches are available with ABS float arms for special applications.
Polypropylene is non-ageing and is unaffected by ground conditions. It will not support algae or bacterial growth, and has exceptional resistance to most acids, alkalis and solvents. Polycarbonate has similar properties but is less resistant to alkali solutions.
ABS will withstand weak acids and both weak and strong alkalis.
The L25 level switch should not be used with oxidizing acids, strong alkalis or chlorinated organic solvents. The optional ABS float arm should be employed where strong alkali solutions are to be encountered.
L25 series level switches are intended to be mounted horizontally, in a 25mm B.S.P. socket in the side of tanks. As supplied by the factory, the L25 level switch will give an off condition when the float arm is down, or not being lifted by liquid. The on state will occur when the float is raised by liquid level. This electrical function may be reversed by turning the switch electrical module end for end. Thus an on state will occur when the liquid level drops and the float is lowered.
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