MSA W-65 Self-Rescuer. Purpose. A self-rescuer is a device to be used in case of emergency for escape through atmosphere containing carbon monoxide All personnel in underground mines need to know how to use a self-rescuing device and to be aware of its limitations. Goals of the Course.
Hopcalite changes carbon monoxide, a poisonous gas, into carbon dioxide, a relatively harmless gasDiagram of a Self-Rescuer