Manufacturers Electronic
Zentech Manufacturing, Inc. is a premier electronics contract manufacturing company offering assembly of printed circuit boards, PCB testing, and design services.
http://www.zentech.com/

Power Meters
At Hoyt Electrical Instrument Works, all meters (both analog and digital), testers, transducers and various panel-mounted components are built to satisfy the most demanding customers and are built to last in the field.
http://www.hoytmeter.com/