Which two common sensors are present on the device?

Which two common sensors are present on the device?

• A. O2 (Oxygen) & Lower Exposure Limit (LEL)
• B. CO2 & NO2
• C. NO2 & SO2
• D. CH4 & O3

Answer: (A)

The device is designed to protect you from two major dangers in unfamiliar environments: not having enough breathable oxygen and the presence of flammable gases. An O2 sensor checks the ambient oxygen level to ensure the air is breathable and to warn if it becomes oxygen-deficient, which can be life-threatening even if other readings seem normal. An LEL (Lower Explosive Limit) sensor monitors combustible gases and alarms well before anything reaches the point where ignition could occur, helping you avoid explosive atmospheres. Other pairings involve toxic gases or combinations not typically included together on a standard safety detector, so they don’t provide the same broad, immediate safety coverage as oxygen plus flammable gas detection.

The device is designed to protect you from two major dangers in unfamiliar environments: not having enough breathable oxygen and the presence of flammable gases. An O2 sensor checks the ambient oxygen level to ensure the air is breathable and to warn if it becomes oxygen-deficient, which can be life-threatening even if other readings seem normal. An LEL (Lower Explosive Limit) sensor monitors combustible gases and alarms well before anything reaches the point where ignition could occur, helping you avoid explosive atmospheres.

Other pairings involve toxic gases or combinations not typically included together on a standard safety detector, so they don’t provide the same broad, immediate safety coverage as oxygen plus flammable gas detection.