Nav-Aids Ltd.
RVSM air data accessories kits and products, pitot static test adaptors by Nav-Aids Ltd
http://www.navaidsltd.net/

Imperial Flange & Fitting Company, Inc.
Orifice plates, flanges, venturi tubes, nozzles, pitot tubes, meter runs, multistage orifice assemblies, valve manifolds
http://www.imperialco.net/

Druck Incorporated
Manufacture products ranging from pressure transducers and transmitters to high performance pitot static air data instruments.
http://www.druck.com/

D. Marchiori Srl
RVSM Air Data Test Set (ADTS) for Pitot-Static leak testing and certification including pitot-static probe adaptors. Aviation Ground Support Equipment (AGSE), tachometer test sets, tilt tables, thermal test sets and angular protractors.
http://www.dma-aero.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/

TubeTronic
tubetronic.com
http://www.tubetronic.com/

Dwyer Instruments, Inc.
Full line catalog of Industrial controls including pressure gages, manometers, pressure-switches, transmitters, flowmeters, flow-switches, pitot tubes, anemometers, air velocity instruments, Level-Switches, temperature-controllers, thermocouples, RTD's, and valves
http://www.dwyer-inst.com/

Phamitech International Company Ltd
Exporter of electron tubes, TWT, valves, thyratrons, magnetrons, klystrons, transmitting tubes, heating tubes, vacuum interrupters and X-ray tubes made in China
http://www.phamitech.com

Cole Static Control, Inc
USA. Design and manufacture of static control equipment, web and sheet cleaners, ionizing equipment, static bars, static eliminators, ion guns and floor mats for the plastics, packaging, printing, converting, electronics, textiles, nonwovens, and injection and blow molding industries.
http://www.staticelimination.com/

Daily Electronics
Retailor of electron tubes and vacuum tubes, plus new and hard-to-find obsolete tubes.
http://www.dailyelectronics.net/