GUILDLINE INSTRUMENTS 9340 SERIES of precision DC Resistance Standards are a complete family of easy to use resistance standards offering the best combination of highest accuracy and widest range commercially available.

Guildline Instruments 9340-4T Series of precision RTD Simulators and DC Resistance Standards are a complete family of easy to use low to ultra-low, 4 Wire resistance standards offering the best combination of accuracy and resistance range that is commercially available.