This invention relates to non-contact monitoring devices, and more
particularly, non-contact respiration monitoring devices. According to
the invention there is provided a monitoring device having a body
defining an air monitoring channel between an air inlet and an air
outlet. Disposed in monitoring channel is a respiration detection means,
such as a flap-valve, which operates with associated logic circuitry to
report the presence or absence of respiration via visual and audible
displays. The device may be configured to attached, or be integrally
connected to, the air input orifice of an air filter canister of a gas
mask or the like. Alternatively, the device may be associated with the
air output orifices or valves of a gas mask or the like.