Units are available for Alfa Laval valves LKB/LKLA, SRC, ARC and ARC-SB     A micro switch can be compared with a standard light switch but in a very small size and light in weight, a so called subminature switch. The features of an environment proof sealed subminature switch are : Small size and light in weight, with ample electrical capacity, precision operation and long life. The micro switch used in indication units is furthermore enclosed within a corrosion-resistant aluminium housing to seal the switch contact and terminals against contamination.   This type of switch is a non-contact electronic switch. It consists of an oscillator which creates high frequency electromagnetic fields which radiate from the sensing face of the switch.   The Hall prox. switches are also non-contact electronic switching elements. The sensor registers a magnetic field (north pole) and consists of a Hall element (a type of a transistor) matching part, an amplifier and an output part. The Hall prox. switch is ideal for modern computer processing.