Sulfur dioxide (SO2) is a colorless, highly toxic gas with a strong, irritating odor. It is widely used in industries such as pulp and paper, chemical processing, food and beverage, coking, and petroleum refineries. Furthermore, the burning of sulfur-containing fossil fuels, such as coal and oil, releases SO2 into the environment, making it a major source of air pollution.
Inhaling SO2 can cause serious health problems. For example, in low concentrations, it causes irritation to the nose and throat, while high levels cause nausea, vomiting, and corrosive damage to the respiratory system and lungs. People with respiratory problems, especially asthma, are more vulnerable to the effects of this gas. Furthermore, contact with the skin or eyes can also result in severe reactions, and in more intense exposures, it can even lead to blindness.
When SO2 combines with water, it forms sulfuric acid (H2SO4), a corrosive substance that contributes to acid rain and significant environmental damage. Therefore, monitoring sulfur dioxide levels is crucial to prevent risks to human health and preserve the environment.
Technologies for SO2 detection
A Prosense SO2 gas detectors Equipped with high-precision electrochemical sensors. Depending on the environmental conditions and application, the detectors are available with measurement ranges ranging from 0-10 to 0-100 ppm, making them suitable for safe or explosion-proof areas.
Among the main features of these detectors, the following stand out:
- Exd base for zones 1 and 2 or Category-3 for zone 2
- Integrated 4-20mA analog and RS485 digital output
- Alarms with adjustable levels for greater control
- Optional relays for direct alarm monitoring
- Sensor head with guaranteed calibration certificate
- Kit for practical wall mounting
- Optional display module for local visualization of levels
These features ensure that SO2 detection occurs quickly and reliably, protecting people and facilities.
To ensure the safety of your operation and protect the environment, contact us and check out the complete line of Prosense sulfur dioxide detectors. Our team is ready to help you choose the ideal solution for your needs.




