Active Indicator

Abstract: An implantable stimulation device is interrogated by an external programmer, operated by a medical practitioner, to determine whether a recommended replacement time indicator in the device is set to an active state. If the recommended replacement time indicator is active, the programmer displays the active indicator and an accompanying message explaining various causes that may result in the indicator being set to the active state. The programmer then retrieves battery diagnostic data, which may include, but is not limited to battery test rate, battery voltage, battery current, and battery impedance, and optionally generates a battery longevity prediction graph. The battery diagnostic data and the prediction graph are then displayed by the programmer to the medical practitioner. The medical practitioner may then analyze the battery diagnostic data and the prediction graph to determine whether the recommended replacement time indicator was properly set by the implantable stimulation device to the active state. Finally, the medical practitioner can use the programmer to reset an improperly set recommended replacement time indicator to the inactive state.

Abstract: WATER LEAKS FROM CONTAINERS OR CONDUITS ARE DETECTED BY CHEMICAL INDICATORS. THESE MAY ACCUMULATE WATER AT THE LEAK SOURCE TO GIVE A CLEARLY DISCERNIBLE COLOUR CHANGE. SUCH INDICATOR MAY BE PROVIDED IN THE FORM OF A NONCORROSIVE EASILY REMOVABLE PAINT OR A NON-CORROSIVE ADHESIVE TAPE WITH OR WITHOUT A PROTECTIVE TRANSPARENT COVER SO AS TO FACILITATE DIRECT APPLICATION TO A METAL SURFACE. THE INDICATOR CAN COMPRISE (A) A CARRIER AND A STRONTIUM CHROMATE/SILVER SULPHATE COUPLE AS THE ACTIVE INDICATOR, OR (B) A CARRIER AND A POTASSIUM FERROCYANIDE/FERRIC SULPHATE-INERT BRIGHTENER COUPLE AS THE ACTIVE INDICATOR, OR (C) A CARRIER AND A POTASSIUMN FERROCYANIDE/CUPRIC SULPHATE-INERT BRIGHTENER COUPLE AS THE ACTIVE INDICATOR. THERE MAY ALSO BE PRESENT AN ADHESIVE COMPONENT, A FUGITIVE DISPERSING COMPONENT AND A WATER MISCIBILITY IMPROVING COMPONENT.

Abstract: Method for detecting a basic target species in a fuel composition, involving (i) contacting the composition with a solid (for example paper) substrate carrying a spectroscopically active indicator which is capable of reacting with the target species, and (ii) detecting the spectroscopic response of the indicator on or following its contact with the fuel composition. The target species may be a detergent or dispersant additive or a constituent thereof, for example in an automotive fuel. The spectroscopic response may be a colour change, and the indicator may for example be a phenolphthalein indicator such as tetrabromophenolphthalein ethyl ester (HTBPE). Also provided is a test kit for use in the invented method, which may comprise a reference, such as a colour chart, with which to compare the spectroscopic response of the indicator. The indicator-carrying substrate is suitably packaged in a protective atmosphere.

Abstract: A color-changing environmental stimulus indicator includes a substrate, an active indicator placed above the substrate, and a reference component. The active indicator is configured to change color in response to an environmental stimulus. The reference component is also color changeable in response to an environmental stimulus. The reference component is configured to have a similar appearance to the active indicator at an end point. The environmental stimulus includes one or more of temperature, cumulative temperature, humidity, pH, and ultraviolet radiation.