Abstract: A portable, sequential air sampler having an easily transportable housing containing therein a plurality of interrelated components which allow the air sampler to operate by either battery or "line" power as well as maintain the flow rate through the sampling media substantially constant. The components include a vacuum pump and rotary valve which are capable of sequentially drawing air through the sampling media. In addition, a flow rate control system is operably connected to the vacuum pump in order to maintain the substantially constant flow rate through the sampling media. The air sampler can vary initiation of the sampling operation from 1-999 minutes while varying the sequence of sampling from 1-99 minutes, and, yet, maintai substantially constant air flow throughout the air sampling procedure.

Abstract: A sorption tube atmospheric sampling system having a sorption tube, a vacuum pump and a flow meter. The sorption tube is made of a hollow elongated tubular-shaped element of rigid, non-corrosive material having a pair of mesh filters located at each end thereof and the sorbent material located therebetween. After the sampling operation has been completed, analysis of the collected pollutants within the sorption tube is accomplished by means of a conventional gas chromatography-mass spectrometry analysis in which Helium is passed through the sorption tube while the tube is located within a uniquely designed thermal desorption block. The desorption block is configurated so as to encompass the sorption tube during utilization thereof. As a result, it is now possible to utilize the same sorption tube for both the sampling and desorption operation.

Abstract: A constant volume rebreathing system when utilized in conjunction with an external air source, such as man. The rebreathing system forms a completely closed system between man and the environment. There is a stainless steel bellows within the system which in conjunction with ancillary equipment controls the differential pressure between man's lung and the bellows. A pressure transducer senses any pressure change and in accordance therewith alters the volume of the bellows, thereby assisting man's use of the rebreathing system. In addition analyzers are located within the system to monitor the various gases present.

Abstract: A protective hood (balaclava) for ground and aircrews is disclosed. The protective balaclava may be worn beneath chemical respirators and flight helmets, and is fabricated from activated charcoal fabric to provide additional protection against chemical agents. The activated charcoal cloth acts as both a shield and provides absorptive layers to absorb toxic chemicals that might otherwise contact bare skin. For wearers, this balaclava provides an under-the-helmet disposable charcoal fabric hood that overlaps the top of the undercoverall, the facial opening of which can be drawn over the periphery of the facepiece of the chemical biological oxygen (CBO) mask.