SCSR

Learn More About Self Contained Self Rescuers

Also known as Emergency Escape Breathing Devices (EEBDs), Self-Contained Self-Rescuers (SCSRs) are life-saving respiratory protection systems designed to help workers escape dangerous environments during an emergency. Unlike CO Filters, which only function in limited conditions, these closed-circuit oxygen rebreathers supply breathable air when the surrounding atmosphere becomes toxic, oxygen-deficient, or otherwise unsafe. Designed to be compact and worn on a belt or stored in escape caches, SCSRs are critical, yet ideal, components of emergency preparedness programs in underground mining, tunneling, and heavy industry—giving workers the vital time they need to evacuate safely. Whether escaping fires, explosions, or gas releases, a reliable SCSR can mean the difference between life and death.

 

Why CSE? 

CSE Corporation has been a trusted leader in escape breathing technology for over 50 years. Our family of SCSRs—including the SRLD, ASR, and our newest model, the SYB-30—are engineered to meet the varied needs of today’s industrial and mining environments. We offer a range of approved durations including 30-, 45-, and 60-minute escape units, so safety teams can match the right device to the conditions and risks of each operation.

CSE is proud to offer the world’s smallest and lightest NIOSH approved 60-minute rated SCSR, the SRLD, which maximizes portability without compromising protection. All our devices are compact, rugged, and designed for ease of use—with no required factory refurbishment, reducing long-term maintenance costs and downtime. Built with the realities of emergency escape in mind and backed by our world-class customer support, CSE SCSRs are trusted by thousands of professionals who count on them when every second matters.

 

Frequently Asked Questions

What is an SCSR and how does it work?

A Self-Contained Self-Rescuer (SCSR) is a portable breathing device that provides an independent oxygen supply during emergencies. Using a closed-circuit system, it recycles exhaled air and chemically generates oxygen, allowing the wearer to breathe safely in oxygen-deficient or toxic environments.

How long does an emergency breathing device last?

CSE offers Self-Contained Self-Rescuers with rated durations of 30, 45, and 60 minutes. The actual duration can vary depending on factors like the user’s physical exertion and environmental conditions. It's essential to select a unit with a duration appropriate for the escape route and expected hazards.

Who needs to carry an emergency breahting apparatus?

These devices are typically required for workers in underground mining, tunneling, and other confined or hazardous environments where toxic gases or oxygen deficiency may occur. Regulations often mandate that workers carry or have access to an SCSR at all times in such conditions.

What is the difference between an SCSR and a CO filter?

A CO filter only removes carbon monoxide and requires ambient oxygen to function. In contrast, an SCSR supplies its own oxygen and works in environments where the air is oxygen-deficient or completely unbreathable—making it a safer and more versatile option for emergency escape.

Do Self-Contained Self-Rescuers require maintenance or refurbishment?

CSE’s devices are designed to be maintenance-free and do not require factory refurbishment during their service life. This reduces cost, administrative burden, and downtime while ensuring the device is ready when needed.

Can emergency breathing devices be used more than once?

No, Self-Contained Self-Rescuers are single-use devices. Once activated, they should be replaced. However, training units are available to help workers practice donning and using the device correctly in non-emergency settings.