FIELD: electrical equipment.
SUBSTANCE: described is a device and system for remote determination and signaling of open and/or closed state of gate (O) of element (3) for controlling gas flow in gas distribution line (2), comprising electric switch (17, 18) configured to generate an electrical signal for indicating at least one of open and closed states.
EFFECT: disclosed is a detection and alarm system.
10 cl, 6 dwg
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