For that reason, fire fighters can use a portable handheld measurement device, which shows them the existence of hazardous gases. The detection is done by photoionization. The absorption of high energy photons by a molecule results in ionization of that molecule. The ionization current is proportional to the concentration of the molecule. This provides a simple method for quantitative analysis of a variety of compounds. The technique is nondestructive and can be used in conjunction with additional detectors to extend the analysis.
Emergency first response
Fire fighters need to evaluate the situation very fast when they are in action. Their focus is to extinguish the fire, but besides that their own safety and health has highest priority.