Description
The Honeywell FS7-2173-2RP is a standalone, unitized multi-spectrum infrared (IR^2) digital flame and fire detector specifically optimized for semiconductor wet benches, cleanrooms, and chemical processing environments. It is engineered with a wide 120^\circ conical field of view and housed in a leak-proof polypropylene enclosure that resists acid, alkali, and organic solvent corrosion. The detector processes signals through advanced digital signal processing (DSP) algorithms to execute a dual-stage alarm response, ensuring immunity to false triggers caused by smoke, chemical vapors, or background thermal radiation.
Technical Specifications
| Parameter | Value / Specification |
| Brand / Manufacturer | Honeywell / Honeywell Analytics |
| Model / Part Number | FS7-2173-2RP |
| Detection Technology | Multi-Spectrum Infrared (IR^2) |
| Field of View (FOV) | 120^\circ conical cone of vision |
| Enclosure Material | Polypropylene (acid/alkali/solvent resistant) |
| Sealing System | Viton O-ring configuration |
| Relay Configuration | Non-latching discrete Alert and Alarm relays |
| Input Voltage Required | 24 V DC nominal |
| Current Consumption | 55 mA nominal (verify peak current draw during alarm) |
| Internal Diagnostics | Continuous microprocessor self-test and optical path monitoring |
| Event Logging | Built-in non-volatile memory storing up to 6 fire events |
| Standard Cable Interface | 20-foot pigtail cable assembly |
Commercial and Availability Logistics
- Product Condition: New Original (Factory Sealed) or Refurbished (fully recalibrated and optically certified).
- Warranty: 12-month technical warranty covering sensor degradation, relay coil integrity, and enclosure seals.
- Availability: In stock. Standard handling and global dispatch time is 2 to 4 business days.
- Pricing Notice: Indicative commercial pricing is subject to fluctuating component allocations and manufacturer price matrices. Contact our engineering procurement team for a firm, written quote.
Engineering Considerations and Field Deployment Notes
Dual-Stage Flame Verification Logic
The FS7-2173-2RP features a distinctive two-stage threat response mechanism.
- Stage 1 (Alert Relay): Tripped upon detection of an initial radiant heat or fire signature.
- Stage 2 (Alarm Relay): Tripped when the integrated DSP confirms the precise frequency modulation and intensity profile unique to an actual sustained chemical or organic flame.
This sequential processing prevents the deployment of suppression agents (like CO_2 or clean agent systems) due to transient environmental noise.
Semi-Wet Bench Installation Best Practices
When positioning the unit within semi-wet process benches, ensure the optical window faces away from direct contact spray nozzles. While the polypropylene housing provides superior chemical resistance against acidic fumes and solvents, chemical crusting or residue buildup on the sensor’s external window will distort the incoming infrared light paths. This obstruction can lead to delayed detection timing or cause the processor to throw an active optic-fault diagnostic code.
Interfacing and Relay State
The “2RP” configuration denotes the integration of non-latching relay arrays. This means the contacts reset automatically once the fire is extinguished or the radiant signature drops below threshold limits. If your facility’s fire safety policy requires localized physical lockout verification at the tool level, the detector must be connected to a latching circuit loop within the centralized fire alarm control panel (FACP) or tool control PLC.
Frequently Asked Questions
Can this detector differentiate between real fire and high-temperature background heating elements?
Yes. The multi-spectrum infrared sensors focus tightly on the specific narrow-band pulsation frequencies characteristic of hydrocarbon and non-hydrocarbon flames. Static thermal signatures—such as those generated by hot quartz baths, infrared heaters, or glowing heating elements—are rejected by the internal digital signal processing algorithms.
What is the recommended service interval for testing the optical window?
In standard cleanroom settings, execute a visual check and optical performance verification every 6 months. In high-fume chemical environments, pull the inspection interval down to 3 months. Utilize the manufacturer-approved test lamp to verify that the internal sensors respond accurately across the entire 120^\circ window area.
How do I retrieve historical data from the internal memory?
The detector’s internal non-volatile memory stores tracking data for up to six recorded fire events. Accessing these event files requires interfacing with the device’s diagnostic communication port using Honeywell’s proprietary interface software and cable adapter kit.
Technical Notice: Cross-reference your exact chemical exposure chart, panel voltage drops, and loop supervision designs with the official Honeywell Analytics FS7 series installation manual before putting any safety shutdown loops online.
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