methane detector

He doesn't show them any data on methane detectors.

Field methane detectors, like this one in use at Loscoe, are an important means of gathering data.

Investigators do not know who deactivated the methane detector, workers or the foreman.

They said that the mine's management deliberately disabled a methane detector, among other safety violations.

Who messed with the paperwork and methane detectors.

Officials said the mine's management had deliberately disabled a methane detector to avoid costly work stoppages.

It sounded like a locomotive going down the road," said Kent Smith, who also has a methane detector in his house.

Mitigation systems for modern buildings include subsurface barriers, ventilation systems, methane detectors, and alarms.

An Australian contractor was fined last month for three safety violations after its methane detector was found to be faulty at the time of the explosion.

As a member of the Stella Coal Company rescue team, he used Stephenson's lamp as a methane detector.

Contaminated soil has been covered with a protective cap and new fill, and a new methane detector has been installed in the school's boiler room.

Methane detectors have been commonplace in underground mines since the 1970s, but it's not clear whether they were in use at Upper Big Branch at the time of the explosion.

MSHA also is still searching for a methane detector that shouldhave been at the mine's main working face and a remote control forthe longwall mining machine used in that area.

West Virginia mine safety officials are moving to unlicense a foreman at a mine where an explosion killed 29, saying he didn't turn on his methane detector when he was supposed to be checking for the explosive gas.

Methane was at first wrongly suspected as the cause of a 1990 tunnel fire, and an alarm from a methane detector in another section of tunnel led to construction workers' evacuation from the entire system this year.

A portable methane detector has been developed which, mounted in a vehicle, can detect excess levels of methane in the ambient atmosphere and differentiate between natural methane from rotting vegetation or manure and gas leaks.

Methane detectors came about in the early 20th century and have been commonplace in underground mines since the 1970s, said Scott Shearer, CEO of CSE Corp., which makes gas sensors and emergency gear for miners.

The city of Los Angeles designated approximately 400 blocks overlying the old oil field as a "High Potential Methane Zone" as a result of the 1985 explosion and subsequent investigation, and later required all structures to have a methane detector, to give warning of accumulation of the gas before it could attain explosive concentrations.