As awareness of indoor air quality increases, indoor air testing monitors are becoming essential health appliances in homes. Among them, the formaldehyde sensor is a critical component for detecting formaldehyde concentration, and its reliability is a point of significant interest.

Currently, there are two main types of formaldehyde sensors on the market: electrochemical sensors and optical sensors.

● Electrochemical Sensors: These produce an electric current through the oxidation of formaldehyde, proportional to the formaldehyde concentration. They offer high sensitivity and fast response times but may have a shorter lifespan and are susceptible to cross-interference.

● Optical Sensors: These measure formaldehyde concentration by analyzing light absorption characteristics. They provide high precision and stability, though they tend to be more expensive and larger in size.

When choosing a sensor, consider the brand reputation, sensitivity, accuracy, and the cost of replacement. While formaldehyde sensors are a convenient way to stay informed, they should be used in conjunction with other measures to ensure a healthy indoor environment.