IQTEK (国仪量子技术（合肥）股份有限公司), also known as Chinainstru and Quantumtech (Hefei)) is a company that develops and manufactures quantum precision measurement technology. Its products include electron paramagnetic resonance devices, quantum sensing devices, gas adsorption analyzers, scanning electron microscopes, etc. The company caters to chemical, life science, energy, technology, and other sectors.