Apparatus and method for ultrasonic detection of foreign materia

Apparatus and methods for measuring fluid flow parameters

Apparatus and methods for performing acoustical measurements

Apparatus and methods for performing acoustical measurements

Apparatus and methods for performing acoustical measurements

Apparatus and process for measuring the gradient of refractivity

Apparatus for analysis of aerosols

Apparatus for analysis of mixed gas components

Apparatus for detecting chemical agents including olfactory...

Apparatus for determining the explosion limits of a flammable ga

Apparatus for measuring a gas value

Apparatus for measuring and/or monitoring a constituent of an at

Apparatus for monitoring impurities in a gas stream

Apparatus for monitoring moisture in a gas stream

Apparatus for monitoring moisture in a gas stream

Arrangement for the quantitative and qualitative analysis of...

ASM output ultrasonic oxygen sensor

Background acoustic signal suppression in photoacoustic...

Battery voltage regulating and condition indicating circuit for

Breath testing system