• Vaiseshika Electron Device

Senior/Industrial Kelvin Double Bridge Type: 9403/9404

Vaiseshika Electron Devices offers the senior/industrial Kelvin double bridge type: 9403/9404. Type: 9403 is an important instrument in the measurement of very low resistances of the order of 0.1 micro ohm. The bridge has the capability to measure low resistance spanning from 0.02 micro ohm to 1.1 ohm. Ten standard resistors drawn from managanin sheets, each having a value of 0.001 ohm, are provided in the bridge. The slide wire is divided into 500 divisions to provide a resolution of 2 micro ohm. This slide wire is totally immersed in oil to ensure total stability of resistances in the bridge. Four terminal methods are employed to obtain accurate results on the bridge. Type: 9404 is an identical version of senior Kelvin double bridge. But the slide wire is 0.01 ohm divided in 500 equal parts, and is not immersed in oil. Ten standard Manganin resistant coils of 0.01 ohm are provided in this bridge. Separate terminals for current and potential leads are provided. Again, silver-to-silver hard plated switches have been used for best results. Applications: cable industry, resistance measurement of transformer armature windings, temperature rise test of transformers and impurity determination in metal sheet and metal rod manufacturing industries.