The **FFS-R32H5** is a high-performance, high-voltage **Flame Sensor** or **UV Sensor** assembly, primarily utilized in industrial burner management systems and gas turbine monitoring. It is designed to detect the presence or absence of a flame by sensing ultraviolet (UV) radiation. --- ### 1. Key Technical Specifications The following table outlines the core electronic and physical characteristics of the FFS-R32H5: | Feature | Specification | | :--- | :--- | | **Sensor Type** | Ultraviolet (UV) Tube | | **Spectral Response** | 185 nm to 260 nm | | **Operating Voltage** | 325V DC ± 25V | | **Sensitivity** | High (optimized for gas/oil flames) | | **Operating Temperature** | -20°C to +120°C | | **Housing Material** | Aluminum alloy with heat-resistant insulation | | **Connector Type** | Multi-pin industrial plug (often 5-pin) | --- ### 2. Internal Electronic Components The device is more than just a simple sensor; it contains integrated circuitry to ensure reliable signal transmission over long distances. * **UV Phototube:** The heart of the unit. When UV light hits the cathode, it triggers a discharge between the electrodes, creating a measurable pulse. * **Pulse Shaper:** Converts the raw discharges from the phototube into a clean pulse train that can be interpreted by the Flame Safeguard Controller. * **EMI Shielding:** Internal circuitry is shielded to prevent interference from high-voltage ignition transformers nearby. * **Protection Diode:** Prevents damage from reverse polarity or voltage spikes from the control cabinet. --- ### 3. Functional Working Principle 1. **Detection:** The UV tube reacts only to the short-wave ultraviolet radiation (185-260nm) found in the "primary combustion zone" of a flame. It is blind to sunlight and glowing refractory brick (infrared). 2. **Conversion:** The sensor converts the photons into electrical pulses. 3. **Transmission:** These pulses are sent to a **Flame Amplifier** or **Burner Control Unit** (like the FFS-A or FSR series). 4. **Safety Action:** If the pulse frequency drops below a calibrated threshold (flame out), the electronic controller triggers a fuel shut-off within milliseconds. --- ### 4. Installation & Maintenance Notes * **Alignment:** The electronic sensor must have a clear "line of sight" to the first third of the flame. * **Cooling:** If the ambient temperature exceeds 100°C, the electronic components may degrade; air cooling is often required via the sight pipe. * **Cleaning:** The quartz glass lens must be kept free of soot and oil, as these block UV rays even if the flame is visible to the human eye. ---