AdSem, Inc. is an advanced semiconductor company that develops and volume‑produces customized silicon and germanium NTC thermistors for temperature ranges from 1 mK to 750 K. Its product lineup includes silicon high‑temperature NTC thermistors, germanium high‑temperature NTC thermistors, germanium & silicon low‑temperature (cryogenic) thermistors, and specialized slow‑neutron and X‑ray mosaic monochromators, alongside various semiconductor materials, all offered with high performance at realistic prices.