Computer-controlled apparatus for testing and measuring for concentrations of gas and liquids; Dust measuring apparatus; High pressure manometers; Electrical transducers; Level indicators; Pressure gauges; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems; Level switches for monitoring and controlling liquids in tanks and vessels; Amplifiers; Apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; Apparatus for recording distance; Temperature sensors; Pressure sensors; Pollutant sensors; Industrial calibration sensors; Electronic proximity sensors and switches; Temperature switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems; Sensor chips for scientific use; Electronic plant moisture sensor; Electronic data relays for sensors; Environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; Optical sensors; Gas sensors for measuring gas concentration; Sensors for measuring concentrations of chemicals in water; Sensors for the determination of temperatures, positions and distances; Electric sensors; Piezoelectric sensors; Vehicle safety equipment, namely, electronic tire pressure monitors; Ultrasound probes, not for medical use; Level measuring machines

Installation, maintenance and repair of measuring and testing apparatus and instruments

Calibration services; Electronic monitoring and reporting of pressure using computers or sensors