Paper area density measurement from forward transmitted...

Paper quality discriminating machine

Particle concentration measuring method and device

Passive remote sensor of chemicals

Photo expansion gas detector

Photo-thermal sensor including an expansion lens in a light beam

Photoacoustic device and process for multi-gas sensing

Photoacoustic gas sensor utilizing diffusion

Photoacoustic sensor

Photoacoustic spectrometer

Photoacoustic spectrometer with analysis-signal enhancement

Photoacoustic spectroscopy apparatus and method

Photoacoustic spectroscopy sample array vessel and...

Photoacoustic spectroscopy sample array vessels and...

Photoacoustic spectroscopy system

Photocoustic signal detecting device

Photoelectric detector

Photographic film blackening area measuring device

Photometer for measuring hot gases

Photometer head for small test volumes