Gas Meter Safety Features

When a gas meter (microcomputer meter) detects a fault, its indicator lamp flashes red as a warning, and it automatically shuts off the gas supply.

Gas Meter Safety Features

Automatic gas shutoff function

Earth quake shutoff

Earth quake shutoff

The meter shuts off the gas supply when it detects a strong earthquake (5+ or more on the Japanese seismic intensity scale).

The red lamp flashes regularly, one flash at a time
 

Shutoff for continuous use timeout

Shutoff for continuous use timeout

The gas supply is automatically shut off if gas continues to flow at a fixed rate for a certain period of time. This can happen if you leave the shower running or heat the bath for too long.

The red lamp flashes in pairs of flashes
 

Shutoff for excessive flow

Shutoff for excessive flow

The gas supply is automatically shut off if the flow of gas exceeds the volume set for each size of meter. This can happen if a gas pipe breaks or a gas cock is opened by mistake.

The red lamp flashes in groups of three flashes
 

Shutoff for insufficient pressure

Shutoff for insufficient pressure

If the pressure inside the microcomputer meter drops to an abnormally low level for any reason, such as when gas pressure drops, the meter recognizes the situation to be dangerous and shuts off the gas.

The red lamp flashes regularly, one flash at a time
 

Warning indicator function

Gas leak warning

Gas leak warning

A warning is indicated if a flow of gas continues for 30 days or more, which could be due to a low-volume gas leak. A warning is also indicated if the pilot flame of a gas appliance is left on.
(A warning may not be issued if the flow volume is smaller than the limit that can be detected by the microcomputer meter.)

The red lamp flashes regularly and continuously
 
Caution
The gas meter cannot shut off all gas leaks or completely prevent all gas explosion accidents.
There are also other kinds of accident it is also unable to prevent, such as deep fryer fires and exhaust gas poisoning.
The gas meter cannot do anything about a gas leak on its upstream side.