D k instruments offers a float type level switch. All controls have been designed using modular concept. Standard assemblies may be incorporated in a wide variety of arrangements to meet virtually any control application and allowing maximum interchangeability of assemblies. Dk`s unique engineering and manufacturing capability handles special process requirements promptly without long delays at an economical cost. The basic operation principle for magnetic switch action results from a change in liquid level, which moves a magnetic attraction sleeve [ss 410/ms] into the field of an externally located `u` magnet.