Delta Controls Limited
Instrumentation, process control, pressure switch, temperature switch, pressure transmitter, temperature transmitter, fibre optics, flow, switches, transmitters. A Concentric company.
http://www.delta-controls.com/

Differential Pressure Plus, Inc.
Company offers precision differential pressure gauges for air, gases, liquids and chemicals to meet economic demands of the filter industry. Visit site for more information.
http://www.differentialpressure.com

Transmitter Documentation Project
Detailed information about all the Shortwave Radio Transmitters installed in each country of the world.
http://www.tdp.info/

Sensocon, Inc.
Our products include the Series S2000 mechanical pressure gauges and Series A digital differential pressure gauges and controls for measurement of low differential pressure featuring universal power, digital calibration, and Opti-Link programming.
http://www.sensocon.com

Whitman Controls
Whitman Controls Corporation is an established leader in the manufacture of miniature pressure, differential pressure, vacuum and liquid level switches. It has achieved this by providing a quality product to customer specification at a competitive price with overnight delivery on popular models.
http://www.whitmancontrols.com/

H.F.Jensen
Measurement, Displacement, transducer, pressure, level, differential pressure, industrial amplifiers, transmitter, level transmitter, pressure transdu
http://www.hfjensen.dk/

IPPN Measurements and Controls
IPPN Measurements & Controls instrumentatie en kalibratie voor druk, temperatuur en electrische grootheden daarnaast verhuur van test en kalibratieapparatuur, produktielijn lektesters en lage drukverschilzenders
http://www.ippn.nl/

ITT Barton Instrumentation
Differential pressure indicators and switches for the controlling flow, level and pressure of gases and process fluids. Based in Norfolk, Virginia.
http://www.ittbarton.com/

Mid-West Instrument
Leading Manufacturer of Differential Pressure Gauges/switches, Pulsation Snubbers, Pressure Limiting Valves, Averaging Pitot Tubes, Portable Flow Measurement and Backflow Prevention Device Test Kits
http://www.midwestinstrument.com/

DesignFlex Switches
Manufacturer of pressure switches, vacuum switches, pressure and vacuum switches
http://www.designflexswitches.com