Editing Alcohol Sensor Based on Gas-Sensitive Resistive Materials (section)

=== Dynamic Response (Rise Time and Recovery Time) ===

The dynamic behavior of the MQ-3 sensor is characterized by its response time and recovery time. These parameters describe how quickly the sensor reacts to changes in ethanol concentration.

The response time (or rise time) is defined as the time required for the sensor signal to reach 
a certain percentage (typically 90%) of its final value after exposure to ethanol.

The recovery time (or decay time) is the time required for the sensor to return to its baseline 
value after the ethanol source is removed.

These parameters are important for evaluating the real-time performance of the sensor. A shorter response time allows faster detection, while a shorter recovery time enables repeated measurements with minimal delay.

In practical measurements, both response and recovery times are influenced by gas diffusion and desorption processes, and therefore depend on environmental conditions and measurement setup.