I have been tasked with what seems an almost impossible feat. It sounds simple but for some reason it is not. I am looking for a device that can monitor combustible dust, in this case wood dust from pellets. It must be able to handle concentrations of 50g/m^3. The area to be monitored is a coal bunker, roughly 80’ tall and 20’x50’. And most important it must be intrinsically safe! This has been my biggest problem. I have found a handful of suitable monitors yet they are not intrinsically safe. Who designs a combustible dust monitor that could end up being the source of an explosion?! Any help would be greatly appreciated.