To beep or not to beep
That is a question not all single gas detectors can answer. Getting it wrong is unthinkable. Getting it right is what MSA’s Pulsar® Alarm does best.

Two crews were working side by side in a Texas City, Texas, refinery. An AltairStrickland, Inc., crew was using Pulsar Alarms; the other crew carried another brand of gas detector. Elsewhere in the refinery, someone switching lines caused a hydrogen sulfide gas release. The Pulsar units went into alarm. But--the other crew’s gas detectors were mute.

Fred Phillips, a foreman for AltairStrickland, wasn’t surprised. “I’ve tried ’em all and come to rely on MSA quality.” Fortunately, for all the workers involved, the Pulsar Alarm’s sensors performed reliably. Both crews evacuated the area safely and waited for the gas to dissipate.

Phillips continued, telling of one refinery worker perplexed about another brand of single gas detectors that “just chirp and chirp and chirp for no reason at all. They just couldn’t get ’em stopped.”

Alarmed, another worker asked, “Where’ve you been?”

With a tickle in his East Texas drawl, Phillips reenacted the reply, “I’ve been over here in the lunch tent!”

(Methinks either there’s something rotten in someone’s lunchbox or THAT gas alarm doth protest TOO much!)


“Hydrogen sulfide (H2S) is a common byproduct of oil refining. At low levels, it isn’t toxic, but increased concentrations can cause respiratory failure and death. Its familiar rotten-egg smell can be a potent warning. But with prolonged exposure, we lose our ability to smell it. This can give us a false sense of security when the danger is greatest."