Testing and Measurement

AD Power Co. - Products include standby power meters (such as Wattman HPM-100), oscilloscopes, spectrum analyzers, DC power supplies and other instruments.

Basics of High Voltage Probe Design - Covers theory, tips, pratical advice, sources, parts, links to other sites, and information about HV probes uses and design.

Electronic High Voltage Meters - Circuit and formula for constructing high voltage probes.

Measuring High Voltages by Spark Length - Table and graph gives maximum spark length for DC or low frequency sinusoidal voltages. A fairly accurate safe way to measure really high voltages.

Rectifiers and Electronics - Manufacturers of AC/DC high voltage and high current testing equipments, spark testers, industrial voltage stabilizers, AC and DC welding equipment, battery chargers. New Delhi, India.

Sphere Gap Breakdown Voltage Tables - How to measure high voltages with some precision.

Vitrek - Manufactures high potential testers for both AC and DC measurements including a complete ground safety, fault locating, and measurement systems.