Saiya Sensor SY-VOC-28BPS

The SY-VOC-28BPS air quality sensor is a broad-spectrum gas sensor featuring high sensitivity, low cost, long service life, and low power consumption. It offers high sensitivity to a wide range of trace reducing gases and mildly toxic gas molecules, including ammonia, hydrogen, alcohol, carbon monoxide, methane, propane, butane, styrene, propylene glycol, phenol, toluene, ethylbenzene, xylene, formaldehyde, and other volatile organic compounds (VOCs), as well as cigarette smoke, wood and paper combustion smoke, and cooking fumes. The sensor is a metal oxide planar semiconductor type, sintered from nano-scale SnO₂ powder with appropriate catalyst dopants. When trace reducing pollutant gases are present in the air, the sensor's conductivity increases in proportion to the gas concentration, enabling detection of air pollution levels. For example, when secondhand smoke or cosmetic volatile molecules are present indoors, the sensor generates a measurable conductivity change. Leveraging this sensitive characteristic in conjunction with simple MCU control, the sensor can intelligently trigger ventilation and air purification systems to automatically purify indoor air. The sensor is suitable for a wide range of applications, including homes, hospitals, restaurants/hotels, conference rooms, reception rooms, guesthouses, transit waiting halls, card and chess rooms, and clubs. These environments commonly contain pollutants such as formaldehyde, secondhand smoke, and alcohol vapors, and the sensor can trigger intelligent air purification systems to operate automatically. It is also applicable to IoT deployments for monitoring air quality conditions in specific spaces and enabling network-wide air quality surveillance. The sensor must be protected from exposure to organosilicon vapors, high-concentration corrosive gases, alkali metal salts, halogen contaminants, water, and freezing environments, and must not be subjected to excessive voltage, to prevent performance degradation or damage. Corrosive gases include H₂S, SOx, Cl₂, and HCl.

• Low power consumption
• Long service life
• Low cost
• Compact size
• High sensitivity to low-concentration pollutant gases
• Simple application circuit
• High consistency

• Air quality testers and modules
• Indoor exhaust/ventilation fan control modules
• Air quality monitoring modules
• Air purifier automatic control modules