IGR Enterprises
Developer of electronic solid-state oxygen generation technology. Self-sustaining oxygen generating systems for medical and industrial use.
http://www.igroxygen.com/

Oxigraf Inc.
Oxygen Analyzers: Oxigraf is YOUR source for fast laser diode oxygen analyzers and OEM oxygen sensors.
http://www.oxigraf.com/

Alarming Oxygen Depletion Caused by Hydrogen Combustion and Fuel Cells
Hydrogen combustion implies the permanent removal from our atmosphere of directly usable oxygen, a serious environmental problem called oxygen depletion, since the combustion turns oxygen into water whose separation to restore the original oxygen is prohibitive due to cost. Abstract.
http://arxiv.org/abs/physics/0009014

SeQual Technologies
Manufactures industrial and medical oxygen and nitrogen delivery systems. Offers a description of the separation process and comparison between conventional oxygen concentrators and advanced technology fractionators. San Diego, California.
http://www.sequal.com/

Delta Ohm Inc.
Strumenti di misura portatili - Portable measuring instruments
http://www.deltaohm.com/

Oxyguard International
Manufacturer of dissolved oxygen measuring equipment, for use in acquaculture, waste water treatment, power plants, and other industrial applications.
http://www.oxyguard.dk/index.html

ENOTEC
ENOTEC One of the Leading Suppliers of InSitu Flue Gas Measuring and InSitu Analyser Systems, führend in der Entwicklung und Produktion von InSitu Sauerstoffmessungen und Emissionsmessungen
http://www.enotec.com

Ashutosh Overseas Enterprises
Distributors/importers of oxygen and other gas analytical instruments and oxygen sensors including PPM (trace) and percentage oxygen sensors.
http://www.aoe.co.in

Topac Conductivity Meters and Probes
Directory page for temperature, conductivity, and salinity meters and probes with various cell constants, RS232 and mains or battery power
http://www.topac.com/conductivity_directory.html

HEITO
HEITO conçoit et fabrique en standard ou à la demande vos thermostats VIGITHERME miniatures a réglage fixe et vos appareils de mesure électrochimiques industriels et de laboratoire : pH-mètres, redox, conductivité, oxygène dissous, électrodes et sondes industrielles
http://www.heito.com/