FLOW RATE METERING DEVICE, COMMUNICATION SYSTEM, FLOW RATE MEASURING METHOD, FLOW RATE MEASURING PROGRAM, FLUID SUPPLY SYSTEM AND GAS TOOL MONITORING DEVICE

摘要

Intended is to make more prompt and proper the counter-measures of a flow rate measuring device against a new event in a use environment. In a gas meter (100), an ultrasonic flow meter (104) measures the flow rate of a gas to flow in a passage (102), and a new event detecting unit (108) detects it from the flow rate pattern of the measured flow rate that a new event or an event not existing in the previous use environment has newly occurred in the use environment of the fluid. A transmit-receive unit (110) transmits a new event signal indicating the new event detected by the new event detecting unit (108), to a center device (200) via a network (300). The new event is exemplified by the introduction of a new gas tool into a user's house, an abnormal use of the tool, or the detection of a CO generation.