9 Apparatus and instruments for monitoring, measuring and checking (supervision); apparatus and instruments for condition monitoring; apparatus and instruments for monitoring fluid; apparatus and instruments for magnetic filtration; magnetic filters; baffles for use in magnetic filters; smart magnetic filters; baffles for use in smart magnetic filters; power flushing filters (magnetic); baffles for use in power flushing filters (magnetic); smart power flushing filters (magnetic); baffles for use in smart power flushing filters (magnetic); testing apparatus and instruments; water testing apparatus and instruments; water monitoring apparatus and instruments; apparatus and instruments for testing and monitoring water in central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus and instruments for monitoring and testing central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus and instruments for monitoring and testing the efficiency, performance and consumption of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus and instruments for monitoring and testing heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; apparatus and instruments for monitoring and testing the efficiency, performance and consumption of heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; checking, monitoring and controlling apparatus for heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; checking, monitoring and controlling apparatus for central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus, equipment and instruments for measuring the efficiency, performance and consumption of heating apparatus, systems, devices and installations; parts and fittings for all of the aforesaid goods