JLC International
JLC International for humidity sensors, humidity transmitters, humidity calibrators, handheld humidity meters, hygrometers, dewpoint meters and dew point transmitters, gas and liquid turbine, Pelton Wheel, Oval Gear and ultrasonic flowmeters, air velocity transmitters and switches and other instrumentation for the industry
http://www.jlcinternational.com/

LPB Communications
LPB Communications Inc. manufacturer and supplier of studio equipment, low power AM transmitters, TIS/HAR transmitters, high power AM transmitters.
http://www.lpbinc.com/

Furness Controls, Inc.
Furness Controls is a leading manufacturer of flow meters, calibrators, differential and low pressure transmitters as well as flow meters. laminar flow elements, pilot static tubes, micromanometers and production line flow meters provide a full range of flow products for laboratory, industry and manufacturing.
http://www.furnesscontrols.com

CTE International
Manufacturer of terrestrial FM and TV transmitters, digital audio and video transmitters, microwave systems, UHF radio links, antennas and combiner filters. Based in Italy.
http://www.cte.it/

Decade Transmitters Inc.
Decade Transmitters Inc. Manufacturer of low power, professional FM transmitters.
http://www.decade.ca/

Spark Gap transmitters
Tesla Coil history, explained through from the days of spark gap transmitters.
http://www.vistech.net/users/w1fji/spark.html

Moore Industries International
The world leader in interface instruments for fieldbus, signal conditioners and temperature sensors.
http://www.miinet.com/

INC Technical Incorporated
INC Technical Incorporated, INC Technical, INC Technical Home, Ohio, Kentucky, Indiana, Worldwide
http://www.inctechnical.com

Electron Machine Corp
Manufacturer of refractometers, polarimeters, solids analyzers, density analyzers, density transmitters, solids transmitters and process analyzers.
http://www.electronmachine.com/

Airtronics
Transmitters, receivers, and servos.
http://www.airtronics.net/