GE RS-FS9009-03 | Dry Flame Detector UV Sensor 124T5712P0001 In Stock

Description

Key Technical Specifications

Product Introduction

Forget the old Geiger-Muller tubes that constantly needed purging and cooling air just to survive. The GE RS-FS9009-03 (often tagged as 124T5712P0001) is a “Dry” flame detector, meaning it runs indefinitely without a cooling system. It uses a silicon carbide photodiode that specifically targets the longer wavelength UV分量 emitted by the flame. This lets it see right through the fuel fog in the combustion can, ignoring the visible and infrared light radiating off the hot chamber walls.What makes this unit a workhorse is its split-design. The UV-sensitive photodiode sits in the hot end (rated up to 325°C), while the temperature-sensitive electronics are isolated in the cool end. It outputs a solid 4-20 mA signal with a response time under 175 milliseconds. Honestly, the sapphire window is incredibly tough, but if it gets coated in carbon deposits during a bad start-up, your signal will drift. Keep a spare gasket handy because that 3/4” NPT mount can seize up if it hasn’t been touched in years.

Quality SOP & Tech Pitfalls (The Reality Check)

The Lab Report (SOP)
Before this leaves the warehouse, it goes through a strict protocol. We start with a visual inspection of the sapphire window for scratches and verify the GE/Baker Hughes holographic labels to rule out counterfeits. Next, it hits the test rack: we apply 24V DC to the cool end and verify the 4-20 mA output loop is active and stable. We also check the resistance across the MIL-DTL-38999 connector pins to ensure no internal wiring breaks occurred during shipping. Finally, it gets sealed in an anti-static bag with desiccant.The Engineer’s Warning (Pitfalls)
Here is where people mess up: The “Hot End” and “Cool End” are a single sealed unit. Do not try to unscrew or modify the housing. I’ve seen technicians try to “clean the internals” and they instantly void the seal, letting moisture kill the electronics. Also, pay attention to the interconnecting cable rating (max 300Vrms). If you run this cable in the same tray as high-voltage ignition exciters without proper shielding, that 4-20 mA signal will be full of noise, causing false flame-outs.

Installation & Configuration Guide

1. Pre-Installation: ⚠️ Ensure the turbine is completely shut down and the combustion can is cool enough to touch. Verify you have the correct 3/4” NPT port and that the threads are clean.
2. Removal: If replacing an old unit, carefully disconnect the MIL-DTL-38999 connector. Unscrew the 2-1/4″ Union Nut. Pull the assembly straight out.
3. Installation: Inspect the new sapphire window for dust. Insert the probe into the mounting port. Tighten the Union Nut securely to maintain the pressure seal (rated for 400 psig). Connect the cable to the cool end—ensure the 5-pin connector clicks and locks.
4. Power-On & Testing: Apply 12-30 VDC power. Use a multimeter to check the output current. Without a flame, it should sit at a baseline (often near 4 mA or a specific fault current, check your logic). Perform a functional test during a controlled turbine light-off to verify the UV response.

 Compatible Replacement Models

• ✅ Drop-in Replacement: 124T5712P0001. This is the exact same part number often used interchangeably in GE/Baker Hughes documentation. It requires zero wiring changes.
• ⚠️ Software Compatible: RS-FS-9001. While also a GE flame detector, the mounting dimensions and sensitivity curves can differ. You can physically install it, but you must verify the 4-20 mA scaling in your Mark* logic.
• ❌ Hardware Mod Required: Geiger-Muller based detectors (Legacy). Older wet-type detectors require cooling air lines and purge systems. Swapping to the RS-FS9009-03 requires capping off air lines and modifying the mounting bracket.

Frequently Asked Questions (FAQ)

Can I replace just the window if it gets scratched?
No. The manual explicitly states the unit cannot be modified or disassembled. If the sapphire window is damaged, you have to replace the entire detector assembly.Does this detector need cooling air to operate?
No, that’s the whole point of the “Dry” series. The electronics are separated from the hot end, allowing it to run indefinitely without an external cooling system. Just make sure your ambient temp around the cool end stays under 140°C.Is 124T5712P0001 the exact same thing as RS-FS9009-03?
Yes. In the field and in most procurement systems, these numbers point to the same GE dry flame detector hardware.What happens if the cable gets too hot?
The interconnecting cable is rated up to 250°C for short durations, but try to keep it in a cooler zone (under 140°C) for continuous operation. If the cable insulation melts, you’ll get a ground fault that will trip your flame relay.Why is my output signal maxing out at 21mA?
The specs list a max output of <21mA. If you are reading a solid 21mA or higher constantly, you likely have a wiring short or the detector is saturated by extreme UV interference (like an arc welder nearby). Check your shielding.