Water level detection apparatus; Water level gauges; Water level indicators; Water level regulators (other than valves being parts of sanitary installations); Application software; Computer software (programs); Computer software applications (downloadable); Computer software downloaded from the internet; Downloadable software applications (apps); Water leakage detection alarms; Warning apparatus (other than for vehicles); Warning indicating apparatus (other than for vehicles); Warning alarms (other than for vehicles); Apparatus for the detection of moisture; Cellular radio alarm communication apparatus; Cellular radio alarm communication instruments; Closed circuit television monitoring apparatus; Closed circuit television monitoring installations; Control centres being parts of alarm systems; Detection apparatus, other than for medical use; Devices for measuring water depth; Electronic apparatus for detecting leaks; Electronic equipment for measuring environmental conditions; Electronic instruments for monitoring systems associated with buildings; Electronic instruments for monitoring systems in buildings; Electronic sensors