Lot Of 2 Siemens FDOT421 Fire Alarm Photoelectric Smoke Heat Detector Head

The Siemens FDOT421 is a combination photoelectric smoke and heat detector head commonly used in fire alarm systems.

Key Specifications

• Compatibility: Siemens fire alarm panels
• Voltage: 24 VDC
• Type: Photoelectric Smoke and Heat Detector
• Mounting: Standard base with screw terminals
• Operating Temperature: 32°F to 120°F
• Detection Range: Smoke sensitivity: 0.5% - 20.5% obscuration per foot