Packaging or container with optical indicator

Particle analysis system with photochromic filter

Particle detecting system

Particle evaluator

Paste solids measurement in real time

Phase detector for optical figure sensing

Phase-coded control for ring laser gyro

Photodensitometer for measuring optical fringe patterns

Photoelectric smoke detector with means for adjusting the amount

Photographic color densitometer check plate

Photomask inspection by optical spatial filtering

Photometer

Photometric liquid analyzers for use in clinical or chemical lab

Photon-counting integrating nephelometer

Plant comparator

Plasmon resonance measuring method and apparatus

Polarimeters

Polarization rotation analyzer

Portable instrument to determine concentration of AFFF in fresh

Portable refractometer