Why is it essential to calibrate gas detectors regularly?

• A. To increase battery life.
• B. To reduce nuisance alarms only.
• C. To ensure accurate readings and reliable alarms.
• D. To train miners in reading displays.

Answer: (C)

Regular calibration keeps gas detectors accurate because sensor elements drift over time and are influenced by temperature, humidity, and contamination. By exposing the detector to a known concentration of gas and adjusting its readings accordingly, the device aligns its display with the actual air concentration. This matters for safety because correct readings mean alarms trigger at the right levels, giving miners enough time to react and preventing both missed detections and unnecessary nuisance alarms. Calibration isn’t about extending battery life or training miners to read displays; those are separate issues. It’s about maintaining sensor accuracy so the alarms you rely on are trustworthy.