- Description
- Specifications
FW-2S Low-Profile Photoelectric Smoke Detector
The FW-2S is a compact, photoelectric smoke detector designed with a non-directional smoke chamber and integrated LED status indicator. It uses a pulsed LED light source and a silicon photodiode receiver to detect smoke presence with high reliability. In normal standby mode, no light reaches the receiver. During a fire, smoke particles scatter light into the receiver, and two consecutive high-level signals within a short period trigger the internal alarm circuitry. The LED remains lit during an active alarm for clear visual feedback.
Key Features:
✔ Ultra-low profile housing — only 1.8" high
✔ Non-directional smoke chamber design
✔ Tamper-resistant locking feature
✔ Built-in magnetic Go/No-Go test capability
✔ Removable smoke labyrinth for service or cleaning
✔ Automatic sensitivity verification meets NFPA 72 Chapter 7 standards
Ideal For:
Fire alarm system installers and building maintenance professionals who need a dependable, low-maintenance smoke detector with integrated test and verification functionality.
Why Choose This:
The FW-2S delivers dependable smoke detection in a slim, vandal-resistant profile, with built-in test features and compliance to NFPA testing standards — simplifying inspections and long-term maintenance.
FAQs:
Q: How does this smoke detector detect fire?
A: It uses an LED light source and silicon photodiode to detect reflected light caused by smoke particles entering the chamber. When two high-level signals are received in sequence, the alarm activates.
Q: What happens during an alarm?
A: The detector triggers its internal circuitry and the LED status light stays on to signal an active alarm condition.
Q: Can the unit be tested without removing it?
A: Yes, it includes a magnetic Go/No-Go test feature for tool-free testing and validation.
Q: Is it serviceable?
A: Yes, the smoke labyrinth can be removed for cleaning or replacement as part of routine maintenance.
Q: Does it meet NFPA testing standards?
A: Yes, it has an automatic sensitivity window verification that complies with NFPA 72 Chapter 7.
