FCI 5181-0 Heater Wattage Control Module

The FCI 5181-0 is a specialized heater wattage control module designed by Fluid Components International (FCI) for use in thermal dispersion flow switches and sensors. This circular electronic circuit board regulates heater power to detect flow, no-flow, or low-flow conditions in industrial fluid systems, commonly applied in process control, chemical processing, and HVAC systems. Key features include adjustable switch point potentiometers for precise calibration, lamp indicators for low flow or dry conditions, and robust components like transformers and heat sinks for reliable operation in demanding environments. Advantages over similar products include high accuracy in detecting minute flow changes via thermal principles, durability in harsh conditions, and easy integration with FCI's flow switch lineup. Drawbacks may include its age (manufactured in 1996), potential obsolescence for modern digital systems, and the need for analog adjustments. Based on attached images, the unit appears used with visible wear but intact components; no parent/child assets noted. For resources, refer to FCI's official site for manuals (e.g., FLT93 Series datasheet at https://www.fluidcomponents.com/products/flow-switches/flt93); model decoder not publicly available, but specs derived from similar FCI thermal control modules.