What is a limitation of colormetric indicator tubes?

Colormetric indicator tubes are designed to detect specific gases or vapors by changing color when the chemical they are designed to measure is present in a sample. One of the primary limitations of these tubes is the potential for chemical interference. This means that the presence of other chemicals in the environment can lead to false readings by affecting the color change, either by mimicking the target gas or by undergoing their own chemical reactions that alter the outcome. Therefore, accurate interpretation of results can be compromised, especially in environments where multiple gases may be present.

In addition to this limitation, while the cost of colormetric tubes can vary, they are generally not the most expensive technology available. The training required to use them is typically straightforward and doesn’t usually demand extensive expertise. Furthermore, these tubes can be effective in various oxygen levels, not just low oxygen environments, making chemical interference the most relevant limitation in this context.