What is the best definition of relative response in relation to detection devices?

The best definition of relative response in relation to detection devices is the instrument reading compared to the calibration gas. This concept is crucial in understanding how detection devices measure the presence of specific hazardous materials in the environment.

When a detection device is calibrated, it is set to recognize a particular concentration of a gas or substance that is introduced as a calibration gas. The relative response reflects how well the device responds to the target gas relative to that standard. A good instrument should show a strong correlation between readings obtained in the field and the established readings from calibration gas, allowing users to trust the measurements and take appropriate safety or mitigation actions.

Thus, the definition emphasizes the comparative nature of the readings obtained from the actual environment versus a known standard, ensuring reliability and accuracy in detecting hazardous materials.