Alarms for the detection of inflammable gases; Controlled volume pumps; Electronic equipment for inspection and detection of foreign material within containers; Environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; Fuel pump testers; High-pressure pumps for proportioning and testing purposes; Instruments for detecting and measuring two-dimensional distribution of force and pressure; Leak detectors for vacuum pumps; Metered gasoline pumps; Pressure measuring apparatus; Pressure measuring apparatus; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems; Pressure transducers and transmitters that convert hydraulic or pneumatic pressure into analog electrical signals for monitoring and controlling hydraulic or pneumatic systems; Rupture disks that burst at a predetermined pressure to protect vessels, equipment or systems from overpressurization; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids