Abstract: An apparatus for the delivery of gas to a user of the type suitable to be crossed at least in part by a flow of gas from a supply network includes: a containment casing having at least one gas inlet opening and at least one gas outlet opening, a measurement module of the gas passing through and/or circulates in the apparatus, housed inside the containment casing and fluidically connected to the at least one outlet opening, a regulation module having a device for regulating the pressure of the gas that passes through and/or circulates in the apparatus, an interception module that is placed between the regulation module and the measurement module. The interception module is configured to selectively allow/prevent the passage of the gas flow towards the measuring module, and is electronically connected with said electronic unit to be thus controlled by said electronic unit.

Abstract: An apparatus for monitoring the state of operation of lamp (2) in a public lighting network is provided comprising a sensing unit (6) associated with each lamp (2) for measuring the voltage of and luminous flux emitted by each lamp (2). Each sensing unit (6) also calculates the efficiency of lamp using an efficiency index given by the gradient of the line which, in a Cartesian diagram in which the voltage of the lamp is the x-coordinate and the flux the y-coordinate, represents the instantaneous relationship between the parameters.