Hottinger Bruel & Kjaer (HBK) was created in 2019 by merging HBM (founded 1950) with Bruel & Kjaer (founded 1942), and now leads globally in test and measurement from its London headquarters. A subsidiary of Spectris plc (LSE: SXS), it employs somewhere between 1,001 and 5,000 people across 80 countries and runs production sites in Germany, the USA, China, and Portugal. Its product range covers load cells, strain gauges, torque sensors, accelerometers, microphones, data-acquisition systems such as QuantumX and LAN-XI, and LDS Shaker vibration-testing equipment, while its nCode and ReliaSoft software handles durability, fatigue, and reliability analysis. Serving automotive, aerospace, and industrial customers, HBK concentrates on electrification, smart manufacturing, and sustainability, illustrated by a 2024 solar installation at its Royston, UK site (covering 60% of energy needs) and EMC solutions for EV powertrain testing. It is certified to ISO 9001 and ISO 14001 and stresses precision alongside Industry 4.0 integration.