Non-inductively wound on plastic bobbin in transparent plastic tube with two screw terminals adjusted to ± 0.2 % rating 1 W. 

 

A range of resistance unit based on a high stability metal film element. They offer improved accuracy and robustness. Accuracy 1%.

 

Single tube, open type, consist of a layer of resistance wire wound on an insulating, heat resistant porcelain tube supported on bakelite feet. A brass sliding contact supported by bakelite rider moves on brass rod. Three 4 mm socket terminals, one connected to the sliding contact and other two to the ends of winding.

 

For general laboratory use. In polished wooden box with bakelite top having interchangeable plugs. The coils of constantan wire double silk covered are wound non inductively. Accuracy +1 %.