Calibration is a crucial process that involves adjusting an air sampling device to meet specified manufacturer's standards and industry requirements. It not only guarantees accuracy but also provides a report or certificate of calibration, certifying the product's conformity to specifications. In this article, we will delve into the concept of data integrity in air sampling calibration, reliable calibration, third-party traceability, accuracy, precision, and stability. Understanding these aspects is vital for organizations that rely on calibrated air sampling equipment for accurate measurements.