# Gas Detection Calibration #calibration #maintenance #safety Calibration is the process of adjusting gas detectors to ensure accurate readings by comparing sensor output to known gas concentrations. ## Calibration Methods ### Target Gas Calibration - **Preferred Method**: Using the actual gas to be detected - Most accurate approach - Recommended whenever possible - Provides highest reliability ### Cross-Calibration (Surrogate Calibration) - Using a different gas with calibration factors - Less accurate than target gas calibration - Used when target gas is unavailable or difficult to handle - Introduces uncertainty and potential errors - Calibration factors only valid for new sensors ## Calibration Factors - Determined by sensor manufacturers - Based on typical gas-specific sensitivities - Only valid for sensors without stress history - Individual sensitivities may alter during sensor lifetime - Additional measuring error must be considered ## Best Practices - Always prefer target gas calibration - Use cross-calibration only when necessary - Document calibration method and gas used - Regular calibration schedule - Account for sensor aging and drift ## Safety Implications - Safety is as good as the calibration - Uncertainty in calibration means uncertainty in safety - Proper calibration critical for reliable detection - Regular calibration ensures continued accuracy ## Related Concepts - [[Catalytic Bead Sensor]] - [[Cross-Sensitivity]]