Confined Space Safety: Why Gas Detection Upkeep Can't Be Skipped

Confined Space Safety: Why Gas Detection Upkeep Can't Be Skipped

Confined space entry protocols demand more than owning a gas monitor, proper maintenance and daily testing are what actually prevent fatalities, Safety+Health Magazine reports in a Workplace Solutions column by Ashley Easterwood, a marketer at ION Science Inc. in The Woodlands, Texas.

Market Impact

Easterwood’s guidance centers on two often-overlooked maintenance steps: bump tests and calibration gas checks. Bump tests are described as frequent, daily checks that confirm sensors and alarms respond correctly, while calibration gas testing is a more methodical process used to diagnose whether a monitor’s readings are actually accurate. Both are necessary, according to the column, and neither should be treated as optional even when a worker is already wearing a personal gas monitor.

The piece also emphasizes that personal gas detection devices and fixed gas detection units serve different but complementary roles. Personal monitors give workers immediate readings of hazardous gases in breathing air, while fixed units form part of a broader detection system for the site. Easterwood notes that communication between crew members about what both types of equipment are reading helps ensure toxin levels stay safe and can catch problems in the confined space before they escalate, rather than only after an alarm sounds.

What It Means for Subcontractors

• Crews performing confined space work (tank cleaning, vessel entry, trenching, utility vaults) should run bump tests on personal gas monitors before every single entry, not just at shift start, per the column’s guidance.
• Field service companies should schedule regular calibration gas testing separately from daily bump tests since the two check different things: responsiveness versus accuracy.
• Sites should pair personal gas monitors with fixed detection units and establish a radio or verbal communication protocol so crew members can compare readings from both systems in real time.
• Confined space entry plans should confirm PPE beyond gas monitors, such as masks or oxygen monitors, is on hand based on the specific hazards of the job site, not treated as a one-size-fits-all kit.
• Supervisors overseeing entry permits should verify monitor software is current before deployment, since outdated firmware was flagged in the column as a gap that undermines otherwise-working hardware.