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الأماكن المغلقة

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Ahmed Elbasiouny
Ahmed Elbasiouny

The document discusses gas detection and monitoring. It provides information on: - Combustible gas detection using sensors to monitor levels and ensure they remain between the lower and upper flammable limits. - Toxic gas detection for carbon monoxide and ammonia, noting permissible exposure levels. - Effects of exposure to increasing levels of several gases like methane and hydrogen sulfide. - Application of gas detection in a facility, where sensors measure gas concentrations and ensure they remain below flammable and toxic thresholds for safety. Alarms are triggered if thresholds are exceeded.

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    Air Air 100% 0% Too Lean Too Rich Methane Methane 0% 100% 5.3% 15.0% LFL UFL
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 PPM Effect Time 10 ppm Permissible Exposure Level 8 Hours 50 - 100 Mild Irritation - eyes, throat 1 Hour 200 - 300 Significant Irritation 1 Hour 500 -700 Unconsciousness, Death 1/2 -1 Hour >1000 Unconsciousness, Death Minutes
 PPM Effect Time 35 Permissible Exposure Level 8 Hours 200 Slight headache, discomfort 3 Hours 600 Headache, discomfort 1 Hour 1000-2000 Confusion, nausea, headache 2 Hours 1000-2000 Tendency to stagger 1.5 Hours 1000-2000 Slight heart palpitation 30 Min. 2000-2500 Unconsciousness 30 Min.
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 23.5 - 19.5  LEL = 0 %  CO < 35 ppm  NH3< 25 ppm
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   19.5  23.5 21.1 20.7 20.9
 LEL= 0 0 10 ppm  1000 ppm 
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الأماكن المغلقة
الأماكن المغلقة

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الأماكن المغلقة