Isotek is a wholly owned subsidiary of Isabellenhütte Heusler GmbH KG, located in Dillenburg, Germany. Formed in 1989, Isotek is a leading supplier of precision current sensing and high power resistors, thermo electric and resistance alloys, and precision measurement systems. Located in Swansea MA, Isotek has developed an industry wide reputation for providing high quality products and unparalleled customer support. Testco became Isotek's authorized distributor in 2014.
Precision current sensing and high power resistors.