Pressure sensors and vacuum sensors are not a specific brand but categories of industrial sensors used to measure pressure and vacuum levels in various applications. These sensors are produced by multiple companies worldwide, such as Honeywell (USA), Siemens (Germany), and Endress+Hauser (Switzerland). They serve industries like automotive, aerospace, manufacturing, and HVAC, providing critical data for system monitoring and control. Key products include piezoelectric sensors, capacitive sensors, and MEMS-based sensors, designed for accuracy and durability in harsh environments.