The Electrochemical Formaldehyde Sensor is a gas sensor used to detect formaldehyde concentration in the air. Its working principle is based on the redox reaction between formaldehyde and electrodes.

The structure of an electrochemical formaldehyde sensor mainly consists of a working electrode, a reference electrode, and an ion-conducting membrane. When formaldehyde molecules enter the sensor, a redox reaction occurs, generating an electron flow. The magnitude of this flow is directly proportional to the formaldehyde concentration.

Advantages of Electrochemical Formaldehyde Sensors:

● Fast Response Time: Generally within a few seconds, allowing rapid feedback on air quality changes.

● High Sensitivity: Typically 0.1-10μg/m³, capable of detecting low trace levels of formaldehyde.

● Excellent Stability: Provides minimal error over long-term use.

Applications:

● Air Quality Monitoring: Used for indoor and outdoor monitoring to provide data support for environmental management.

● Indoor Environment Testing: Detects formaldehyde released from renovation materials and furniture to guide purification efforts.

● Household Appliances: Integrated into air purifiers, fresh air systems, and water heaters.