electronics for use in recreational vehicles, motor homes, conversion vans, and over-the-road trucks, namely, electronic dash display which displays the speed, fuel availability, temperature, oil pressure, battery level, and mileage; fuse blocks; electronic battery saving device which monitors the voltage of a battery used in the above described vehicles and which disconnects the battery at such time as voltage falls below a certain level; electronic energy management system which monitors the amount of energy required by each system in the above described vehicles and routes energy to the system that must be operated at any one time; chemical defense equipment in the nature of remote sensing chemical agent alarms utilizing passive, infrared spectrometer with on board microcomputer making agent/no-agent decisions; common module, two field-of-view, forward looking infrared systems utilized for standoff detection of nerve agents; hand held monitors of post attack chemical agent contamination; and electronic alarms utilized in gas filtration, coarse dust, and chemical agent filtration system