The ELECTRONSYSTEM MD SF6 density switches
are based on a multiple-bellows system which responds linearly to fluid
density and which is set to pre-determined density values:
"thresholds". The thresholds can be defined in terms of decreasing
density or in terms of increasing density.
On reaching the pre-set threshold, an electrical switch is activated,
A. activate processes or protection systems;
B. signal the location of anomalous conditions inside a system;
thus enabling monitoring and diagnostic of density of gaseous or,
generally, fluid level.
Activating the action starting from a closed contact instead from an
open one enables the self diagnostic of all circuits interested to the
All the seals are guaranteed with very low temperature too: the gaskets
are not degradable and can't be attacked from substances contained in
the fluid being monitored.