Combustible gas indicators operate by...

Combustible gas indicators operate by...

Question 1 of 2707066636eec28f7522a1c51c104

Combustible gas indicators operate by drawing an air sample into the instrument __________.

Question 1 of 27070

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Q

Combustible gas indicators operate by drawing an air sample into the instrument __________.

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🔍 Key Concepts

• How combustible gas indicators detect gas concentration in an air sample • The role of a heated element or sensor in measuring flammable gases • Why actually igniting the sample inside the instrument would be unsafe

💭 Think About

• Think about what a combustible gas indicator must do to measure gas safely: does it burn the gas, heat it, weigh it, or dilute it? • Which choice best describes a common sensor design used to detect flammable gases in the lower explosive range (LEL)? • Consider which options would be practical and safe to have inside a portable gas detector used in confined spaces.

✅ Before You Answer

• Eliminate any option that would create a significant ignition hazard inside the device itself. • Ask whether specific gravity is normally how flammable gas concentration is measured in air. • Consider which method uses a resistance change in a heated element when exposed to a combustible gas mixture.