37 Installation and maintenance of sensors, air-quality sensors, bio sensors, electrical sensors, electronic sensors, heat sensors, humidity sensors, measuring sensors, pollutant sensors, temperature sensors, trace gas sensors, meteorological sensors, meteorological apparatus, detectors, trace gas detectors, heat detectors, monitoring apparatus, monitoring instruments, monitoring devices, water level indicators, water temperature gauges, oxygen monitors (not for medical purposes), temperature monitors for scientific and/or industrial use, electronic systems for monitoring the environment, and apparatus for data capture, data collection, data processing, data storage, data reproduction, and data transmission; information, advisory, and consultancy services