Gas instruments and air instruments detect, monitor, or analyze gases present in an environment. Detectors sense situations outside normal operating parameters and are set to alarm when these conditions are violated. Monitors are also set up to alarm but their role is to determine which gases are in the stream being measured and in what quantity they are present. Analyzers provide a breakdown of what is found, log the information, and can download it to a computer where further analysis and record keeping can be performed. Different gas and air instruments can sense one or multiple types of gases with one instrument.

JDSU provides a range of infrared filters to match the wavelength spectra of the desired gases to be analyzed, ensuring the surrounding instrumentation can provide an accurate reading of the amount of gas present.