Bar-type NO.sub.x gas sensor having WO.sub.3 sensing film
Beaker cover
Biological preconcentrator
Biological preconcentrator
Biopsy device with illuminated tissue holder
Biosensor system for detecting organic trace compounds produced
Blood cell analyzer with tube holder and cap piercer
Blood containment device
Blood containment device
Breath alcohol detector with improved compensation for environme
Breath alcohol measuring apparatus having a sample intake...
Breath alcohol tester
Breath analysis device
Breath analyzer mouthpiece system
Breath flow indicator
Breath specimen mixer
Breath tester