A control system for bathers includes an electronic controller which controls operation of an electric heater assembly connected in a water flow path for heating water. An alarm is triggered if the monitored parameter exceeds the threshold limit at any time, or if the monitored parameter has not reached a target value by the end of a predefined time period by which an administered drug or therapy should have been effective. The fixed part of the first rotary device can also be mounted on a lifting carriage which is vertically displaceably mounted on the loadbearing device. This discloses novel busbar designs, materials and busbar deposition methods. The second frame can then be registered with the template frame by interpolating the second frame using the shift vector and re-sampling at least a portion of the second frame to produce a registered frame. An etch stop layer is positioned on a front side of the wafer substrate so that portions of the etch stop layer define a roof wall for each nozzle chamber, each said portion defining at least one ink ejection port, also a result of an etching process carried out on each portion.