Gas Dog is a company that specializes in gas detection technology, and its VOC (Volatile Organic Compound) gas detectors are used in a wide range of applications. These detectors are not only effective in detecting a wide range of gases, but also have the advantage of being easy to use and maintain.
GasDog's VOC gas detectors&monitors rely heavily on semiconductor gas sensor technology. This technology is based on the principle that the conductivity of semiconductor materials changes as the composition of the gas in the environment changes. These sensors typically use semiconductor materials that are sensitive to specific gases, such as tin dioxide (SnO₂), and their mechanism of operation lies in the interaction of gas molecules with the sensor surface. When a target gas molecule adsorbs on the semiconductor surface, this results in a change in its electrical conductivity, which generates an electrical signal that can be detected by a circuit.
During sensor operation, when gas molecules (such as methane or carbon monoxide) enter the sensor, they compete with oxygen molecules adsorbed on the sensor surface. This process causes the oxygen molecules to be replaced by gas molecules, resulting in a decrease in the number of oxygen ions, which in turn increases the number of free electrons and ultimately causes a decrease in the sensor's electrical resistance. The change in resistance is proportional to the gas concentration, allowing for accurate measurement of the gas concentration. The advantages of this technology are its fast response time, low cost and compact size, making it ideal for use in domestic and industrial environments.
Gas Dog VOC Gas Detectors&monitor primarily utilize semiconductor gas sensor technology, which operates on the principle that the conductivity of a semiconductor material varies with the composition of the gas. When gas molecules come into contact with the sensor surface, they affect the conductivity of the semiconductor material, allowing the sensor to detect changes in the concentration of the gas. The most common semiconductor material is tin dioxide (SnO₂), which undergoes a chemical reaction when it comes into contact with a specific gas, thereby changing its resistance.
In Gas Dog's design, the sensor contains a semiconductor element inside that is sensitive to a specific gas. Gas molecules adsorbed onto its surface cause a change in oxygen ions, which in turn causes a change in the concentration of free electrons. This change causes a change in the sensor's resistance, which is converted into a readable electrical signal through circuitry, enabling quantitative detection of the gas concentration.The sensitivity and selectivity of GasDog VOC Gas Monitors have been carefully engineered to accurately detect many types of gases.
GasDog VOC Gas Detectors&Monitors are capable of detecting many types of gases, including the following main categories:
Volatile Organic Compounds (VOCs): This is Gas Dog's primary detection target and covers compounds such as formaldehyde, benzene, ethylene, acetylene, vinyl chloride, styrene, and acrylics. These compounds are prevalent in industrial emissions and everyday life and can have a significant impact on human health and environmental quality.
Combustible gases: These include methane (natural gas and biogas), liquefied petroleum gas (LPG) and hydrogen. These gases are commonly found in domestic and industrial environments and their leakage can lead to serious safety hazards.
Toxic gases: such as carbon monoxide (CO), hydrogen sulfide (H₂S) and ammonia (NH₃). These gases pose a threat to human health and must be strictly monitored for the safety of personnel.
Environmental Gases: GasDog VOC Gas Monitorss are also capable of monitoring environmental gases such as carbon dioxide (CO₂), which is becoming increasingly important especially in air quality monitoring and indoor environmental control.
Gas Dog VOC Gas Detectors&Monitors have been further optimized in their ability to detect specific gases by applying different catalysts and modified materials. This results in excellent performance in a wide range of applications to meet the needs of different users.