Selecting the appropriate fixed flame detector requires a careful facility assessment and consideration of various operational factors. There is no one-size-fits-all solution; the optimal choice depends heavily on the specific application and potential fire hazards. The first step is to identify the types of fuel sources present. Different fuels produce flames with distinct spectral signatures. For instance, hydrogen fires are predominantly UV-emitting and nearly invisible, making UV or specialized IR detectors suitable, while hydrocarbon fires emit strongly in both UV and IR ranges.
Environmental conditions play a significant role. Factors such as operating temperature ranges, humidity levels, presence of dust or corrosive substances, and potential exposure to vibration must be evaluated. The detector chosen must be rated to withstand these conditions. Equally important is identifying potential false alarm sources prevalent in the area. Welding, high-intensity lighting, sunlight glint, hot surfaces, and lightning can trigger certain types of detectors. Understanding these interferences helps in choosing a detection technology (e.g., multi-spectrum IR, UV/IR with logic) that offers immunity to these specific sources.
Other crucial considerations include the required detection range and field of view, the desired response time, and necessary certifications or approvals (like ATEX for hazardous areas, FM, or SIL ratings for safety integrity levels). A thorough risk assessment should guide the decision-making process to ensure you choose the right detector that provides reliable protection without excessive false alarms. Consulting with safety professionals and fixed flame detector manufacturers is often advisable to make an informed decision.