What is the main reason beam-type detectors are used in large open spaces?

What is the main reason beam-type detectors are used in large open spaces?

• A. They are cheap
• B. They require no power
• C. It is impractical to install many spot detectors
• D. They detect only flames

Answer: (C)

In large open spaces you want to cover a wide area with as few devices as possible. A beam-type detector uses a transmitter and receiver across the space, so a single installation can monitor a long line of sight. When smoke or particulates interrupt or scatter the beam, the sensor triggers the alarm. This long-range coverage means you don’t have to install many spot detectors everywhere, which keeps installation, wiring, and maintenance far more practical and cost-effective in big rooms. Beam detectors are typically used for smoke detection along a beam path rather than relying on flames, and they still require power to operate.

In large open spaces you want to cover a wide area with as few devices as possible. A beam-type detector uses a transmitter and receiver across the space, so a single installation can monitor a long line of sight. When smoke or particulates interrupt or scatter the beam, the sensor triggers the alarm. This long-range coverage means you don’t have to install many spot detectors everywhere, which keeps installation, wiring, and maintenance far more practical and cost-effective in big rooms. Beam detectors are typically used for smoke detection along a beam path rather than relying on flames, and they still require power to operate.