Gas concentration meters may be products that most people are not familiar with, but they are actually utilized very close to us. For example, in the medical field, they are necessary for managing the oxygen concentration in ventilators. In bags of snacks and food, nitrogen is filled to prevent oxidation, and gas concentration management is essential for that sealing process as well. Additionally, their role is expanding in recent years for environmental conservation, such as analyzing vehicle exhaust gases and managing combustion in incineration plants. Daiichi Thermal Research aims to contribute to the Earth, people, and society by continuously developing high-quality gas concentration meters that play such important roles.