Fluid sensing aparatus
First Claim
Patent Images
1. An apparatus for sensing a fluid, comprising:
- an emitter adapted to project a light beam and an electrical current into the fluid;
a detector adapted to transmit a first signal in response to receiving the light beam and a second signal in response to receiving the electrical current;
means for adding a measured quantity of diluent to the fluid for reducing a concentration of the fluid below a predetermined fluid sump level; and
a processor, responsive to the first and second signals transmitted from the detector, for determining a fluid parameter.
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Abstract
A apparatus for sensing fluid parameters such as optical density, light transmittance, electrical conductivity and/or other characteristics of a fluid, including an emitter adapted to project a light beam and an electrical current and a detector adapted to transmit a first signal in response to receiving the light beam and a second signal in response to receiving the electrical current. A processor determines a set of fluid parameters according to the signals transmitted from the detector. A measured amount of diluent may be added to the fluid to increase light transmittance and/or electrical conductivity so as to enhance sensor operation and sensitivity.
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Citations
26 Claims
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1. An apparatus for sensing a fluid, comprising:
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an emitter adapted to project a light beam and an electrical current into the fluid; a detector adapted to transmit a first signal in response to receiving the light beam and a second signal in response to receiving the electrical current; means for adding a measured quantity of diluent to the fluid for reducing a concentration of the fluid below a predetermined fluid sump level; and a processor, responsive to the first and second signals transmitted from the detector, for determining a fluid parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A printing machine of the type including a fluid sensor, said sensor comprising:
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an emitter adapted to project a light beam and an electrical current into the fluid; a detector adapted to transmit a first signal in response to receiving the light beam and a second signal in response to receiving the electrical current; means for adding a measured quantity of diluent to the fluid for reducing a concentration of the fluid below a predetermined fluid sump level; and a processor, responsive to the first and second signals transmitted from the detector, for determining a fluid parameter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification