MSA MSA AE4 Self-Generating Oxygen Respirator*, a long-duration oxygen respirator* that can be used to enter fire scenes. It is convenient to store without the need for additional freezing or filling equipment, providing low-temperature, dry breathing oxygen, especially suitable for high-temperature rescue environments. It requires no pre-use preparation and can be put into action immediately, with a usage time of up to 4-6 hours. It is applicable for tunnel and mine rescue sites. MSA MSA AE4 Self-Generating Oxygen Respirator* Product Features: 1. Safe oxygen supply at normal pressure. The AE4 self-generating oxygen respirator* uses KO2 canister technology, leveraging a chemical reaction between KO2 in the canister and CO2 exhaled by the human body to produce K2CO3. This molecule can combine with water in the air to form a hydrate, solidifying excess moisture in the air. Combined with a three-stage cooling system, oxygen is generated through chemical reactions, providing oxygen at normal pressure without compressed oxygen, eliminating the risk of poisoning due to excessive CO2! 2. Intelligent controller. The AE4 employs an IC-Air controller for operation and digital monitoring indicators. It features an intelligent alarm function with three alarm stages, providing audible and visual alerts when the system capacity remains at 50%, 20%, and 5%. It also includes a manually activated automatic motion sensor alarm. 3. Long service life. The usage time depends on the intensity of the operation. At an average breathing rate of 30 liters per minute, it lasts for 4 hours, with a maximum usage time of up to 6 hours. 4. Safe and reliable to use. It contains no high-pressure oxygen cylinders and has passed flame engulfment tests, allowing safe entry into fire scenes. The AE4 not only meets the requirements of DIN 58652-2 and vfdb 0802 standards but has also successfully passed stringent flame engulfment combustion test requirements for mine rescue teams and fire brigades.