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

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

Beck
Beck GmbH entwickelt, fertigt und verkauft Komponenten zur Überwachung von Überdruck, Differenzdruck und Vakuum. Diese Druckschalter, Drucktransmitter und Drucksensoren werden kundenspezifisch hergestellt und zur Füllstandsüberwachung, Lüftungs- und Filterkontrolle und Abwasser-Pumpensteuerung verwendet.
http://www.beck-sensors.de/

Kausthubha Udyog
Manufacturer of pressure switches, differential pressure switches, and vacuum switches. From India.
http://www.orion-instruments.com/