Push-in air fittings for pressure sensors are not a specific brand but a type of fitting used in pneumatic systems. These fittings are designed for quick and secure connections in air pressure measurement applications. They are commonly used in industries such as manufacturing, automation, and HVAC. Companies like Festo (Germany), SMC Corporation (Japan), and Parker Hannifin (USA) are leading manufacturers of such fittings, offering reliable solutions for pneumatic and fluid power systems. These products ensure efficient and leak-free connections, crucial for accurate pressure sensing in various industrial applications.