Air analysis apparatus; Automatic pressure control machines and instruments; Electrical integrated control systems for use in the field of waste water treatment; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Electronic devices, namely, energy meters for tracking and monitoring energy usage; Pressure measuring apparatus; Scientific instruments, namely, electronic analyzers for measuring, testing and detecting contaminants and environmental pollutants; Soil moisture meters; Surveying machines and instruments; Temperature controllers for ambient and device monitoring; Water level indicators; Water meters; Electronic control circuits for photovoltaic pyranometers being irradiance sensors used to monitor irradiance from the sun