A bump test is the quick functional check of a gas detector: expose the sensors to a known gas above alarm level and confirm they respond and alarm within seconds. It answers one question before every use, will this instrument actually warn me, and it is the difference between carrying a gas detector and carrying a plastic box shaped like one. Calibration is the deeper, scheduled adjustment against certified gas that keeps readings accurate over sensor life.
Catalytic LEL sensors are poisoned by silicones and lead compounds, electrochemical cells dry out and age, ports clog with dust and water, and none of it announces itself: a poisoned sensor happily reads zero in a gas cloud. That failure is invisible in normal air, which makes gas detection exactly the class of equipment, like emergency lighting, whose readiness exists only in its test records.
A crew preparing a tank entry (per the confined space procedure) bump-tests their four-gas meter at the station: O2, LEL, CO respond; the H2S channel reads the challenge gas at less than half concentration and never alarms. Sixty seconds of test has discovered a degraded cell. The meter is swapped from the charging rack, the failed unit tagged for calibration and cell replacement, and the entry proceeds with an instrument that provably works. Play the alternative through: sludge disturbed mid-job releases H2S, the channel under-reads, and the attendant learns about it from a collapsing entrant instead of a beeping alarm. The bump test is the cheapest sixty seconds in industrial safety.
Fabrico is the register and the rhythm: each detector an asset with cell ages and history, bump and calibration schedules as recurring work orders (or docking-station results recorded against assets), failures escalating to swap-and-repair work automatically, gas cylinder expiries tracked, and the audit trail, who tested what, with which gas, with what result, ready for the day someone asks. Fabrico does not sense gas; it guarantees the sensors are provably trustworthy. EU-built, with EU data residency.
Manufacturer and industry guidance converge on a functional check before each day’s use for portable life-safety detectors. The failure modes it catches develop without warning; the exposure it protects against is immediate. Docking stations reduce the cost to walking past a cradle.
Often the same certified cylinder used differently: a bump test only needs a concentration high enough to trip alarms and confirm response; calibration requires certified accuracy so readings can be adjusted to match. Both must be within cylinder expiry.
Typically two to three years for common electrochemical cells and catalytic sensors, less in harsh service; oxygen cells often shorter. Cell date tracking per instrument turns surprise failures into scheduled replacements.
Want every detector’s bump, calibration, and cell age on one auditable register? Book a Fabrico demo to see life-safety instrumentation run through a field-ready CMMS.
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