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Air Sampling Smoke Detectors

(ASSD)

What do they do?

- Detects for presence of smoke and measures quantity of smoke in the air.

How?

- ASSD's use three major components to detect smoke.

Types of Flame Detectors

Light Spectrum

ASSD Three Major Components

Main Types:

  • Ultraviolet (UV)
  • Near Infrared (NIR)
  • Infrared (IR)
  • UV/IR
  • Dual Infrared (IR/IR)
  • Triple Infrared (IR3)

Other Types:

  • Ionization current flame
  • Thermocouple flame

Types of Heat Detectors

  • Fixed temperature

  • Rate-of-Rise

  • The detector
  • Includes fan and detection chamber

  • Air sampling pipe
  • Usually 3/4" CPVC

  • Sampling ports
  • Holes drilled in the pipe

Overview

Heat Detectors

  • Flame Detectors

  • Heat Detectors

  • Air Sampling Smoke Detectors (ASSD)

  • Questions

What do they do?

- Heat detectors respond to the convected and radiated thermal energy of a fire.

How?

- They detect an increase of temperature with a heat sensitive element.

Air Sampling Smoke Detector

Flame Detectors

What do they do?

- Flame detectors can detect and respond to the presence of flame.

How?

- Using specialized optics, they can detect fire.

Automatic Initiating Devices

QUESTIONS?

By: Bradach Robert

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