Guildline Instruments has been a test equipment manufacturer since 1957, designing and developing ultra-precise devices specifically for professionals in the oceanography and metrology industries. Researchers and engineers use Guildline products to establish traceability to fundamental electrical standards, such as current shunts and potentiometer systems. Guildline customers include national metrology institutes, research labs, militaries, aerospace, nuclear power plants, and businesses in the power and electrical industry. Guildline manufactures the only commercially available instruments that are accurate in the sub parts-per-million range. Consumers trust the Guildline brand thanks to its decades of quality products and services. Find used and refurbished Guildline items at

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