Guildline Instruments has been the premier supplier of resistance measurement systems and standards to the world's national laboratories for nearly half a century. Our broad product line encompasses several models of precision resistance standards optimized for particular applications, AC and DC current shunts, air and fluid baths for precise environment control, and automatic measurement systems with a broad range of accessory products.

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Resistance Bridges and Systems
6622A series of DCC Bridges
6623A Series High Current Range Extenders
6675A Resistance Bridge
6623 DCC Range Extender
6625C Automatic Resistance Measurement System
66001 Lead Compensator
6520 Digital Teraohmeter
6664B Low Thermal Quad Scanner

Resistance Standards
6634A Resistance Standards
6634TS Transportable Standards
9334A High Stability Standards
7334 AC/DC Resistance Standards
9330 Resistance Standards (oil)
9336 High Value Standards (10M ~ 100G)
9337 Ultra High Value Standards (1T ~ 10P)
9340 Decade Resistance Standards
9350 Hamon Transfer Standards

AC/DC Current Products
9230A DC Current Shunt
7320 AC Current Shunt
9200 DC Multiple Standard Resistor
9211A Multivalued Current Shunt

Temperature Measurement and Control Products
5010 Fluid Bath
50103 Temperature Protector
5032/5031 Air Bath
5150 Dual Thermometer
9540 Digital Thermometer
9730CR Oil Bath
9732VT Bench Oil Bath