Alff Engineering PDC-ANALYSER equipment for on-site evaluation of the properties of mixed insulation as found in high voltage transformers. http://www.alff-engineering.ch/

High Voltage Equipment Diagnostics Inc. Specializes in HV diagnostics and PM's for power utilities and sub-stations. http://www.hved.com/

Hachmann-IT Manufacturing of test-equipment for high voltage installations. From Germany. http://www.hachmann-it.de/

HV and EMC Test Equipment High voltage test equipment and EMC test equipment for the power utility, power apparatus, and electronic equipment industries. http://www.hvtechnologies.com/

Hipotronics Manufacturer of high voltage test and automatic test sets systems for users and manufacturers of power apparatus. http://www.hipotronics.com/

Osprey Limited Personal HV safety alarm. Clip-on alarm detects HV in the vicinity and alarms to warn the user. http://www.ospreyltd.co.uk/

Ameesco High voltage test equipment services and consulting. Specializing in the installation, commissioning and maintenance of all types of high voltage test equipment. http://ameesco.com/

High voltage Probes (Tektronics) For O'scopes, from Beta Lambda Instruments. http://www.blii.com/

Zimmer Electronic Systems Manufactures high precision power analyzer and meters. http://www.zes.com

Tucker Electronics Distributor of new and reconditioned electronic test and measurement instruments and environmental chambers. http://www.tucker.com