Gas detectors use various types of sensors, each designed to detect specific gases. The most common types include:
1. Electrochemical Sensors: These are used for detecting gases like carbon monoxide and oxygen. They work by measuring the electrical current that a gas generates when it reacts with a specific electrode.
2. Infrared Sensors: These are ideal for detecting gases like methane and carbon dioxide. They work by measuring the absorption of infrared light by gas molecules.
3. Catalytic Sensors: These are used for combustible gases. They work by initiating a reaction on a heated surface which changes the resistance of the wire.
4. Photoionization Sensors: These are used for volatile organic compounds. They ionize the gas using an ultraviolet lamp and measure the resulting current.
Remember, choosing the right sensor type is crucial for the safety of your plant.