Electric device and method of driving the same

An electric device for monitoring a fluid comprising:

• a diamond film having a first surface and a second surface on an opposite side of said first surface;
• and
• a resistor provided on said first surface of said diamond film,
• wherein said resistor is thermally connected only with said diamond film, and said second surface is in contact with the fluid.

An electric device for monitoring a fluid comprising:

• a substrate;
• a diamond film supported by said substrate, wherein said diamond film is thermally insulated from said substrate;
• and
• a resistor provided on said diamond film,
• wherein said diamond film has an exposed surface to the fluid to be monitored.

An electric device for monitoring a fluid comprising:

• a diamond film, having one and only one contact surface thereof in contact with the fluid;
• and
• a resistor provided on an opposite surface of said diamond film to said one surface and thermally connected only with said diamond film,
• wherein said contact surface is a terminal surface of crystal growth of said diamond film.

An electric device for monitoring a fluid comprising:

• fluid contact means for providing a monitoring interface with the fluid to be monitored, said fluid contact means comprising a diamond film in direct contact with the fluid;
• a heat generator provided on said diamond film;
• and
• a thermally sensitive resistor provided on said diamond film,
• wherein said thermally sensitive resistor is thermally connected with said heat generator only through said diamond film.

An electric device comprising:

• a diamond film;
• a heat generator provided on said diamond film;
• and
• a thermally sensitive resistor provided on said diamond film,
• wherein said heat generator generates a heat pulse, and said thermally sensitive resistor measures a temperature variation of said diamond film caused by said heat pulse.

An electric fluid monitoring device provided on a path for passing a fluid therethrough, comprising:

• fluid contact means for providing a monitoring interface with the fluid path to be monitored, said fluid contact means comprising a diamond film having a first surface and a second surface opposite to said first surface, said second surface in contact with said fluid;
• and
• a resistor provided on said first surface of said diamond film and thermally connected only with said diamond film, said resistor changing resistance in response to a temperature change of said diamond film resulting from heat transfer with the fluid,
• wherein said path is divided into a plurality of paths by a separator provided therein.

An electric fluid monitoring device comprising:

• a fluid path;
• a fluid with a Reynolds number of at least 4000 flowing in said fluid path;
• fluid contact means on said fluid path for providing a monitoring interface with the fluid path, said fluid contact means comprising a diamond film having a first surface and a second surface opposite to said first surface, at least said second surface in contact with said fluid;
• and
• a resistor provided on said second surface of said diamond film;
• and
• a resistor provided on said first surface of said diamond film and thermally connected only with said diamond film.

An electric device comprising:

• a diamond film, one planar surface of said diamond film in contact with a fluid;
• and
• a resistor provided on an opposite surface of said diamond film to said one planar surface and thermally connected only with said diamond film,
• wherein said one planar surface is oriented in a slanting direction to a direction in which said fluid flows.

An electric device comprising:

• a diamond film in contact with a fluid;
• means for intermittently supplying heat to said diamond film;
• and
• means for measuring a temperature variation of said diamond film caused by said heat.

An electric device comprising:

• a diamond film having an exposed surface to contact a fluid to be monitored with said device;
• supporting means for supporting said diamond film, said diamond film thermally insulated from said supporting means;
• means for supplying a heat pulse to said diamond film;
• means for measuring a temperature of said diamond film;
• and
• means for calculating output from variation of said temperature caused by said heat pulse,
• wherein said output is in proportion to quantity of heat removed from said diamond film by said fluid.