Apparatus for transmission of communication; Cards with integrated circuits; Circuit boards; Circuit breaker panel boards; Control valves for regulating the flow of gases and liquids; Electrical controls for irrigation sprinkler systems; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Fire-extinguishing systems; Flow meters; Industrial automation controls; Leak detecting device for water supplied home appliances consisting of water sensor, control unit with audible alarm and water valves; Microcontrollers for internet of things (IoT) enabled devices; Sprinkler heads for fire sprinklers; Sprinkler systems for fire protection; Timing sensors; Water filter controllers; Water treatment equipment, namely, devices connected to a water distribution line, which automatically injects a predetermined proportion of fertilizer into an irrigation system used by a greenhouse complex; Water treatment equipment, namely, fertilizer injection devices which connect to a water distribution line, which automatically injects a predetermined proportion of fertilizer into an irrigation system used by a greenhouse complex; Water treatment equipment, namely, fertilizer injection units, namely, devices connected to a water distribution line, which automatically injects a predetermined proportion of fertilizer into an irrigation system used by a greenhouse complex