Gas meter and gas safety system

A gas meter comprising:

• a flow measurement unit that measures a gas flow flowing through a gas flow passage;
• a flow computing unit that computes predetermined flow data in accordance with a flow value measured by the flow measurement unit;
• a function setting unit configured to set at least one safety function from among a plurality of safety functions pertaining to usage of a gas;
• a monitoring unit that detects, based on the flow value, occurrence of a malfunction arising during usage of a gas;
• a control unit that determines, when the monitoring unit detects a malfunction, whether the detected malfunction corresponds to one of the at least one safety function set by the function setting unit;
• and
• a communication unit that establishes a communication with the monitoring center that monitors a gas supply in accordance with a command from the control unit, wherein
• the control unit further;
• interrupts a gas supply when the detected malfunction corresponds to one of the at least one safety function set by the function setting unit;
• and
• when the detected malfunction does not correspond to one of the at least one safety function set by the function setting unit, sends a report of the occurrence of the detected malfunction to the monitoring center by means of the communication unit.