System and method for in-line optical sensing of hydrogen peroxide
AssigneeCardioQuip, LLC
InventorsJohn DEAN, William STEWART, Douglas PLATT, Jon Lowrey GARDNER
Life of this patent
Estimating the term…
Abstract
A water monitoring system comprising a hydrogen peroxide sensor configured to determine a concentration of hydrogen peroxide in water in a conduit. The hydrogen peroxide sensor further comprises an ultraviolet light sensor configured to determine an ultraviolet light absorbance level of the water in the conduit. The ultraviolet light absorbance level is used to determine the concentration of hydrogen peroxide. The hydrogen peroxide sensor may further comprise a visible light sensor configured to determine a turbidity level of the water in the conduit. The turbidity level also is used to determine the concentration of hydrogen peroxide.
Claims20
A water monitoring system comprising:
- a conduit through which liquid is cycled through a patient accessory and a thermal accessory controller,
- wherein the patient accessory is external to but fluidly connected to the thermal accessory controller;
- wherein the water monitoring system is a part of the thermal accessory controller;
- a hydrogen peroxide sensor that is configured to determine an ultraviolet light absorbance level of the liquid flowing along the conduit that comprises:
- an ultraviolet light-emitting diode configured to transmit ultraviolet light through a first transparent aperture of the conduit into the liquid flowing along the conduit;
- and
- an ultraviolet light photodetector configured to receive and to measure, through a second transparent aperture of the conduit, the ultraviolet light transmitted by the ultraviolet light-emitting diode into the liquid flowing along the conduit,
- wherein the ultraviolet light-emitting diode and the ultraviolet light photodetector are disposed on opposing sides of the conduit;
- a microcontroller that is configured to determine a concentration of hydrogen peroxide in the liquid flowing along the conduit based on an analysis of the ultraviolet light absorbance level;
- and
- an alarm that is configured to indicate that the concentration of hydrogen peroxide in the liquid flowing along the conduit exceeds a threshold in response to receiving, from the microcontroller, an indication that the concentration of hydrogen peroxide in the liquid flowing along the conduit exceeds the threshold.
A method performed by a water monitoring system, the method comprising:
- transferring liquid within the water monitoring system via a conduit;
- identifying an ultraviolet light absorbance level of the liquid flowing along the conduit using a hydrogen peroxide sensor,
- wherein the hydrogen peroxide sensor comprises an ultraviolet light-emitting diode and an ultraviolet light photodetector that are disposed on opposing sides of the conduit;
- determining a concentration of hydrogen peroxide in the liquid flowing along the conduit based on the identified ultraviolet light absorbance level;
- and
- causing an alert that indicates that the concentration of hydrogen peroxide in the liquid flowing along the conduit exceeds a particular threshold in response to determining that the concentration of hydrogen peroxide in the liquid flowing along the conduit exceeds the particular threshold.
A thermal accessory controller comprising:
- a conduit configured to move water through the thermal accessory controller;
- a hydrogen peroxide sensor affixed to the conduit, the hydrogen peroxide sensor comprising:
- an ultraviolet light sensor configured to determine an ultraviolet light absorbance level of the water moving through the thermal accessory controller;
- a microcontroller configured to determine a concentration of hydrogen peroxide in the water moving through the thermal accessory controller based on the ultraviolet light absorbance level;
- and
- an alarm, the alarm configured to indicate that the concentration of hydrogen peroxide in the water moving through the thermal accessory controller exceeds a particular threshold.
Dependencies are inferred from the claim text.