Ravika
Manufacturer of Dead Weight Pressure Gauge Testers. Pressure and Vacuum gauge Calibrators, Precision Dead Weight Pressure Gauge Testers, Gauge Comparators, pressure and vacuum gauges and calibration.
http://www.ravika.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

Manotherm
Manufacturer of high-quality pressure gauges, chemical seals and thermometers
http://manotherm.com/

3D Instruments, LLC
3D Instruments offer you the most precise pressure gauge, test gauge, receiver gauge and refrigeration gauges that you need. They offer you all the monitoring instrumentations you need for your processes.
http://www.3dinstruments.com/

Huadong Pressure Gauge Manufacturer
Huadong Pressure Gauge Company is a professional Chinese pressure gauge supplier, exporter and manufacturer of many types of pressure gauges,regulators and thermomoters. We welcome OEM orders and we are willing to process according to customer's requirements.
http://www.pressure-gauge.com/

Differential Geometry
Several books by Peter W. Michor et al. including "Foundations of Differential Geometry", "Natural operations in differential geometry" (corrected version), "Transformation Groups", and "Gauge theory for fiber bundles" plus papers by the author in postscript.
http://www.mat.univie.ac.at/~michor/listpubl.html

Buffalo Gauge Inc
Since 1966, Buffalo Gauge has served as a service provider for industrial instrumentation repair, calibration and specialty cleaning services. BGI has expanded into new markets in order to better serve our customers. We offer a full range of products and services that provide cost-effective solutions to our customers, including: Instrument Calibration, Cleaning for Oxygen Service (Oxygen Cleaning) or Specialty Surface Preparation, Instrument Certification (inspection), and Pressure/Temperature Instrumentation & Control Sales -- all this done according to our ISO Based QA program. Buffalo Gauge, Inc. is a Division of Gas Zone, Inc. which is the manufacturer of The Neupmatic Valve which is an AGA approved pneumatic remote gas shutoff system that reduces overall collection costs, and shows an excellent return on investment, a reduction in collection expenses, and avoided losses. gauges, instruments, meters, calibration, certification, oxygen cleaning, surface preparation, instrument repair, sales, instrumentation, pressure, temperature, Buffalo, WNY, Western New York, New York State
http://www.buffalogauge.com/

Shreeji Pressure Gauge
Process Control Instruments, Pressure Gauges, Temperature Gauges, Thermocouple, Electronic Instruments, Resistance Temperature Detector, India
http://www.shreejipressuregauges.com/

The Mini Pressure Gauge Company
Manufactures and supplies pressure and temperature gauges from 23mm up to 300mm diameter conforming to BS EN837(1998) standard.
http://www.minipressuregauge.co.uk

Taylor Valve Technology Inc.
Develops valves: control valves, precision electronic deadweight testers, quick disconnects, gauge plugs and gauge probes, safety-relief, back pressure valves
http://www.taylorvalve.com/