Method for monitoring the quality of fire-fighting water in sprinkler systems, and sprinkler head

A sprinkler head for a sprinkler system having comprising:

• a connection fitting including a pipe section for connection to a free end of an extinguishing water pipe of the sprinkler system;
• a closure piece which, in a closed position, closes the pipe section and/or the free end of the extinguishing water pipe to prevent extinguishing water from escaping from the extinguishing water pipe, and, in an open position, releases the pipe section and the free end of the extinguishing water pipe, so that extinguishing water can escape from the extinguishing water pipe and through the sprinkler head;
• a thermal trigger element which, in a normal state, holds the closure piece in the closed position, and, at a trigger temperature, allows the closure piece to move into the open position;
• and
• a conductivity sensor for measuring the electrical conductivity of the extinguishing water is provided on the sprinkler head in a region in which extinguishing water is available in the state of the sprinkler head connected to the free end of an extinguishing water pipe.