Connected Gas Detectors Still Need Calibration

Gas detection is entering a connected era. New instruments stream readings to the cloud, last longer between charges, and even ride on mobile robots into confined spaces. Honeywell recently launched an infrared hydrocarbon sensor aimed at longer service life, and Blackline Safety paired a portable detector with Boston Dynamics' Spot robot to take readings where people should not go. These are useful advances. None of them remove the need to calibrate.

Smart sensors still drift

Connectivity changes how you see data, not the electrochemistry inside the sensor. Electrochemical and catalytic cells still age, still get poisoned, and still lose sensitivity with exposure and time. A dashboard showing a green status only means the device is reporting; it does not prove the reading is accurate. Calibration against a known gas concentration is what proves accuracy.

What the standards still say

ISEA's guidance remains that a bump test or calibration check should be performed before each day's use, in accordance with the manufacturer's instructions. ANSI/ISA-12.13.01 expects combustible gas detectors to respond within about ±10% of the actual concentration for safety-critical use. OSHA has no separate calibration regulation but points employers to the manufacturer's instructions and to industry guidance. Connected features do not change any of these expectations.

Where connectivity actually helps

• Compliance records. Automatic logging of bump tests and calibrations makes audits faster and reduces missed intervals.
• Fleet visibility. Managers can see which instruments are overdue across multiple sites at once.
• Faster response. Live alerts and location data shorten the time between a real alarm and a response.

Don't let convenience replace verification

The risk with smarter instruments is complacency: assuming that because a device is online and self-monitoring, it must be correct. Build calibration into your program no matter how connected your fleet is, and keep a fresh, traceable span gas on hand for every gas you monitor.

On-demand gas generation makes that practical, producing certified calibration gas when you need it at roughly $13.91 per hour versus about $300 per hour for cylinders. Explore GoACD's calibration gas generators to keep every detector in your fleet honest, connected or not.