GUILDLINE INSTRUMENTS 6634A SERIES is a modular series of Resistance Standards that can be rack mountable or simply set on a bench. The 6634A Series provides a set of up to 10 precision resistance standards enclosed in a temperature controlled and EMI protected chamber PRODUCT FEATURES Normal Ohms Resistance Range: 0.1 Ω to 100 MΩ in Single Decade Increments NEW LOW Ohms Resistance Range provides 1 mΩ to 0.1 Ω in Decade Steps Temperature Coefficient < ± 0.005 ppm/°C Stabilities Low as < 2 ppm/year Thermometry Resistance Values Available 4-Wire Low Thermal Gold-Plated Connections Eliminates Oil Bath Requirements Internal PRT Stability: ±0.05 °C / Year Custom Internal Temperature Set Points Ambient Temperature Range: 23 °C ± 5 °C Low Thermal EMF’s – Shielded Chamber Guarded Resistance Element Chamber Custom Values / Models Available CE Marked with World-Wide Voltage & Frequencies Top End Range Values up to 100 TΩ with Guildline Model 6636