Electrochemical cell sensors detect which of the following?

Electrochemical cell sensors detect which of the following?

• A. The presence of oxygen only
• B. Temperature changes
• C. The presence of color in vapors
• D. The presence of specific chemicals such as oxygen, hydrogen and others

Answer: (D)

Electrochemical cell sensors work by turning a chemical reaction of a target gas at an electrode into an electrical signal. Gas molecules diffuse into the sensor, undergo oxidation or reduction at the working electrode in the presence of an electrolyte, and the generated current is proportional to the concentration of that specific species. Because the electrode materials and electrolyte are chosen to respond to particular chemicals, these sensors can be tailored to detect oxygen, hydrogen, and other targeted gases rather than general properties like temperature or color. Temperature or humidity can influence the reading, but the primary function is detecting specific chemicals, not measuring heat or color. So the best description is that they detect the presence of specific chemicals such as oxygen, hydrogen and others.

Electrochemical cell sensors work by turning a chemical reaction of a target gas at an electrode into an electrical signal. Gas molecules diffuse into the sensor, undergo oxidation or reduction at the working electrode in the presence of an electrolyte, and the generated current is proportional to the concentration of that specific species. Because the electrode materials and electrolyte are chosen to respond to particular chemicals, these sensors can be tailored to detect oxygen, hydrogen, and other targeted gases rather than general properties like temperature or color. Temperature or humidity can influence the reading, but the primary function is detecting specific chemicals, not measuring heat or color. So the best description is that they detect the presence of specific chemicals such as oxygen, hydrogen and others.