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Safety lamps were invented in the early 19th century, and are used to this day for gas detection, even as mine lighting has been replaced by electric lights.

Soon after the introduction of the safety lamp underground, miners noticed that its flame changed if there were gases in the atmosphere. In the late-nineteenth century, lamp makers began to develop dedicated gas-testing lamps, such as the Clowes Hydrogen lamp, that would give more sensitive readings of methane levels.

Flame Safety Lamp is a type that used in underground Coalmines and other hazardous gassy areas. Flame Safety Lamp is a type that used in underground Coalmines and other hazardous gassy areas for the finest detection of Methane Gas, Carbon-di-oxide, and deficiency of Oxygen. The flame never betrays or misleads the users ...

safety lamp, lighting device used in places, such as mines, in which there is danger from the explosion of flammable gas or dust. In the late 18th century a demand arose in England for a miner's lamp that would not ignite the gas methane (firedamp), a common hazard of English coal mines.

The three main progenitors of early safety lamps were Dr. William Reid Clanny, Sir Humphry Davy, and George Stephenson.

The device allows air samples to be taken from areas of the mine and blown into the lamp by means of an aspirator bulb. Changes in the colour of the flame reveal the composition of the gas. For example; a large area of blue flame observed above the test flame indicates the presence of methane gas.

History and development LampAir velocity to cause flame to pass the gauze (ft/s)(m/s) Davy 8 ft/s 2.4 m/s Clanny 9 ft/s 2.7 m/s Geordie 11.2 ft/s 3.4 m/s

A safety lamp is any of several types of lamp that provides illumination in places such as coal mines where the air may carry coal dust or a build-up of inflammable gases, which may explode if ignited, possibly by an electric spark.