The Essential Role of Liquid Level Optical Switches in Leak Detection for Hazardous Environments

The Essential Role of Liquid Level Optical Switches in Leak Detection for Hazardous Environments

Learn about PST's reliable ATEX, IECEx and UKCA certified optical liquid level switches, designed for challenging environments where exposure to hydrocarbons, fuels and flammable liquids is likely. By using advanced optical technology, these switches provide immediate detection of the presence or absence of a liquid within a hazardous area.

Built with stainless steel housings and either Grilamid, Trogamid or Polysulfone tips, they operate reliably across a wide temperature range, high pressures, and in most media. Detecting leaks is vital in industrial settings for maintaining operational safety and protecting the environment. Liquid-level optical switches are among the most effective technologies for this purpose.

This article delves into the significance of these switches, especially in hazardous environments, and underscores their role in ensuring safety and compliance with stringent regulatory standards like ATEX.

With infrared technology combined with internal reflection, these switches offer precise liquid detection, rapid response times, and high repeatability. Engineered for durability with stainless steel housing and resistant materials, they operate reliably across a wide temperature range (-30 °C to +80 °C). They play an essential role in industries such as petrochemicals, Hydraulic reservoirs, oil and gas, water treatment sites, and heavy-duty automotive, ensuring safety and efficiency in detecting leaks and controlling tank levels precisely. 

Discover their critical role in industrial applications where safety and reliability are paramount, including leak detection and precise tank level control.

Understanding ATEX

ATEX, established by the EU, safeguards equipment in explosive atmospheres with rigorous safety standards. It ensures devices are intrinsically safe, preventing heat or sparks that could ignite explosions, even when damaged. The directive comprises two main components: ATEX 114 (2014/34/EU) for equipment and protective systems and ATEX 153 (1999/92/EC) for workplace safety. ATEX 114 promotes free trade of compliant equipment within the EU, marked with CE and Ex symbols for seamless distribution in industries like mining and petrochemicals. ATEX standards are crucial in leak detection systems, preventing catastrophic explosions in oil, gas, and chemical processing by using infrared and ultrasonic gas detectors for prompt leak identification and regulatory compliance.

Benefits of Using Liquid Level Optical Switches in Hazardous Environments

Critical Differences Between Hazardous Area-Certified and Non-Certified Liquid Level Switches

The primary differences between Hazardous Area-certified and non-certified liquid level switches lie in their design and functionality, which are tailored to their respective operational environments. Hazardous area certified switches are engineered for use where explosive gases, vapors, or dust may be present. They are constructed using non-sparking materials and robust components that can endure high temperatures, significantly reducing the risk of ignition. These switches are also tightly sealed to prevent the ingress of hazardous substances, ensuring safe operation even in volatile conditions.

In contrast, non-certified liquid level switches are designed for general industrial or commercial environments. They are made from standard materials suitable for typical conditions and include basic safety features sufficient for non-hazardous settings. While non-certified switches are not equipped with the specialized seals, fail-safe mechanisms, and robust construction of ATEX-certified switches, they are designed for general industrial use. Their straightforward design and materials make them more cost-effective and widely available, ideal for non-hazardous applications.

In Conclusion

PST's advanced intrinsically safe optical liquid level switches are pivotal in safeguarding industries operating in hazardous environments exposed to hydrocarbons, fuels, and flammable liquids.  These sensors ensure safe operations by delivering precise and immediate liquid level measurements, helping to prevent accidents and meet regulatory requirements.

Did you know PST also provides ATEX-rated intrinsically safe barriers and cables to complement its sensor solutions? To learn more, please contact our technical team at sensors@processsensing.com where one of our highly skilled engineers will gladly assist.