IET Labs, GenRad 1482 inductance standard – 0,025%, 100μH–10H, toroidal inductors, national standard laboratory grade.
- Stable within ±0.01% per year
- 18 Models values from 1µH to 10H
- Low, known temperature coefficient
- 3 Year warranty included
- Calibration accredited to ISO-17025 included
- Minimized connection errors
- Toroidal - free from external fields
IET continues to produce the 1482 standard inductor series to the same exacting specs as GenRad. These inductors are accurate, highly stable standards of self inductance for use as a low frequency reference of working standard in the laboratory.
Records extending over 25 years, including those of inductors that traveled to national laboratories in several countries for calibration, show long-term stability well within ±0.01%.
Each inductor is a uniformly wound toroid on a ceramic core. It has a negligible external magnetic field and hence essentially no pickup from external fields. The inductor is resiliently supported in a mixture of ground cork and silica gel, after which the whole assembly is cast with potting compound into a cubical aluminum case.
Sizes of 500µH and above have three terminals, two for the inductor leads and the third connected to the case, to provide either a two- or three terminal standard. The 50-, 100-, and 200µH sizes have three additional terminals for the switching used to minimize connection errors.