Berlin Space Technologies GmbH is a vertically integrated company, meaning we produce most of our equipment in house. That said, some components like these magnetic torquers we buy from third party. To make sure that they work properly with and in our systems we test them vigorously before first time use.
The picture shows one of our colleagues confirming the strength of a torque rod by using a precision digital fluxgate magnetometer. The distance between source and instrument is measured using millimetre grid paper.