Air Quality Gas Sensor, CH2O/C6H6, 0.5~1000ppm

Air quality gas sensors ensure cleaner air, specifically designed to detect benzene, toluene, methanol, alcohol, and smoke. Featuring a rugged metal housing and fast-response design, they deliver precise readings across a range of 0.5 to 1000 ppm. Powered by a stable 5V DC supply with power consumption below 300 milliwatts, the gas sensors are suitable for continuous air monitoring, smart home devices, and industrial safety systems.

Feature

• This air quality gas sensor exhibits high sensitivity to benzene, toluene, formaldehyde, alcohol, and smoke.
• It is used for detecting harmful gases in home and office environments, automatic ventilation systems, air purifiers, and similar applications.
• The air quality gas sensor employs a multi-layer thick-film manufacturing process. A heater and a metal oxide semiconductor gas-sensitive layer are fabricated on opposite sides of a miniature Al₂O₃ ceramic substrate, then encapsulated within a metal housing.
• When target gases are present in the ambient air, the sensor's electrical conductivity changes. Higher concentrations of the target gas result in higher electrical conductivity of the sensor.

Dimension (unit: mm)

Test Circuit

Note: The diagram above shows the basic test circuit for an air quality gas sensor. This sensor requires two voltage inputs: Heater voltage (V_H) and test voltage (V_C). VH is used to provide the sensor with a specific operating temperature and can be supplied by either a DC or AC power source. V_RL is the voltage across the series load resistor (R_L) of the sensor. V_C is the test voltage applied to the load resistor R_L and must be supplied by a DC power source.

Long-term Stability Curve

Note: All tests in the figure were conducted under standard test conditions. The horizontal axis represents observation time, and the vertical axis represents the V_RL value.

Sensor Curve

Linear Curve

Sensitivity Curve