Abstract: Gas cells allow first detection light and second detection light to pass therethrough and rotate the polarization plane of linearly polarized light in accordance with a magnetic field. A first detection section and a second detection section detect the polarization planes of the linearly polarized light that has passed through the gas cells. A third detection section and a fourth detection section detect the polarization planes of the linearly polarized light that has not passed through the gas cells. A measurement section uses detection results from the first detection section and the third detection section to remove influence of optical noise contained in the first detection light, uses detection results from the second detection section and the fourth detection section to remove influence of optical noise contained in the second detection light, and measures the difference in the magnetic field between the gas cells.

Abstract: An electronic device with a speaker, an amplifier for driving the speaker and a speaker grill provided on the front surface of the speaker includes a pickup detection unit for detecting that the electronic device has been picked up from water and a water discharge sound generation unit for generating a water discharge sound signal for discharging water having entered inside the speaker grill according to the detection of the pickup from the water and inputting the generated water discharge sound signal to the amplifier.

Abstract: An optical fluorescence-based sensor comprising at least one sensing element is disclosed. In one aspect, the at least one sensing element comprises a waveguide comprising a waveguide core, a light source optically coupled to an input part of the waveguide core, and a photodetector optically coupled to an output part of the waveguide core, the waveguide core being made of a material comprising a mixture of an optical material and a fluorescent dye.

Abstract: The present invention is for a system and a method of VUV photoionization of fullerene and derivative clusters followed by their thermal effusion for a practical energy-efficient and economically-viable high thrust density ion thruster. By taking advantage of the state-of-the-art high intensity VUV photon sources, present invention is able to provide much softer ionization with minimal internal energy deposition than the ionization in the electron impact or charge exchange type ionization in plasma environment used in conventional ion thrusters. Because the invention eliminates the need of additional gas for forming discharge plasma, it permits simpler and lighter structures than the conventional fullerene thrusters with significantly enhanced propellant-usage efficiencies, thrust to power ratios, and thrust to weight ratios.

Abstract: The invention provides a method for measuring light scattered on a sample in a medium, in particular a fluid medium, that comprises the following steps: providing a rotatably arranged measuring cell with a substantially circular cross-section in a plane perpendicular to the axis of rotation for receiving the medium and the sample, rotating the measuring cell, preferably at least once by substantially 360°, about the axis of rotation, in particular by means of a drive, emitting a laser beam by means of a laser onto the sample located within the measuring cell in the plane perpendicular to the axis of rotation at different angles of rotation of the measuring cell, the measuring cell maintaining its position in the direction of the axis of rotation, detecting scattered light signals by means of at least two detectors arranged in a circle and concentrically to the center of rotation of the measuring cell and fixed within set, different angular ranges at different angles of rotation of the measuring cell, and dete

Abstract: A measuring device for the high-precision optical determination of distance or position includes a light source, at least one optical functional element in the form of a plane mirror or a measuring standard, and a detector system. At least two sub-beams are generated, of which at least one impinges on the functional element at least three times before the sub-beams propagate, interferingly superposed, in the direction of the detector system, via which at least one phase-encoded measuring signal is able to be generated from the superposed sub-beams. Between the impingements on the optical functional element, the sub-beam passes through at least two imaging elements, the imaging elements having imaging factors such that no location and directional shear of the interfering sub-beams results in the event the optical functional element tilts out of its setpoint position.

Abstract: Provided is a multi-optical axis photoelectric sensor that can achieve downsizing and weight reduction. The multi-optical axis photoelectric sensor includes a case body which is formed to have open ends and has the same cross-sectional shape in a longitudinal direction of the multi-optical axis photoelectric sensor; end members which are attached to one end and the other end of the case body and each formed of a molded article for closing an opening on each of the ends; and an optical component which is arranged from one end to the other end of the case body so as to be separated from an inner face of the case body. The optical component has a function of defining the spread angle of each optical axes. The optical component and the end members are directly or indirectly physically engaged with each other to unrotatably position the optical component by the end members.

Abstract: A method, system, and program product are provided for removing artifacts from an EM field generator from a rotational 3D scan. The method comprises: preoperatively, characterizing the artifacts from the EM field generator over a range of rotational positions of an x-ray source and detector; intraoperatively, determining the position of the EM field generator relative to the x-ray source and detector; and removing the preoperatively characterized artifacts for the determined relative position of the EM field generator from current x-ray image.

Abstract: A sensor system for determining the position of a gas-liquid interface on a surface includes a light source and photo detectors spaced along the surface and capable of detecting reflections from the light source. The photo detectors are joined to a processor which determines if the detectors have received a reflection when the gas phase of the gas-liquid interface contacts the surface. An optical guide can be provided having the light source and detectors positioned therein. The guide is positioned in the region of the gas-liquid interface. The guide can utilize total internal reflection to distribute light to the detectors where light strikes a gas-guide interface whereas light striking a liquid-guide interface is refracted through the interface.

Abstract: The invention relates to a method of fog and raindrop detection on a windscreen (200), comprising a raindrop detection application (201) and a fog detection application (202), characterized in that said fog detection application (202) comprises a step (202b) in which an indication of the presence of raindrop is detected, said indication of raindrop presence triggering a switch from said fog detection application (202) to said raindrop detection application (201).

Abstract: An apparatus and a method are provided for the detection of the level of the different phases present in at least one tube or vessel intended for filling the different wells of a microplate-format container for an automated analysis system. The apparatus is equipped with a fixing portion arranged to allow it to be itself held and/or handled instead of a microplate-format container, and carries out this detection by measuring the variation in wavelength of light reflected on a point zone of the content of the tube, during a displacement of the tube along an optical reader or of the optical reader along the tube in a rectilinear movement in a known manner. Such a device or method is also operated by illumination with monochromatic light and detection of the amount of reflected light, with the phase differences being recognized by the sudden variation in the amount of reflected light.

Abstract: An aperture member (15) is configured to be mounted to a receiving portion (22) provided to a main body (2), and includes a lower surface portion (15a) formed into an arc shape. The receiving portion (22) of the main body (2) includes a bottom surface portion (22a) formed into a shape corresponding to the arc shape of the lower surface portion (15a) of the aperture member (15) so as to be brought into contact with the lower surface portion (15a) of the aperture member (15). The aperture member (15) includes a light passage opening (15e) formed so that a center position (15ea) thereof substantially matches with a position of a center of curvature of the arc shape of the lower surface portion (15a).

Abstract: Systems and methods perform a first monitoring of a printing engine to produce first data; match a disturbance model that empirically describes types of color variation in a print process to the first data; generate a minimum variance control system based on the identified parameters of the disturbance model. The systems/methods infer a benchmark performance level the minimum variance control system achieves using the disturbance model; adjust operating parameters of a controller of the printing engine to match parameters of the minimum variance control system; perform a second monitoring of the printing engine to produce second data; determine a difference value between the benchmark performance level and the second data. If the difference value is above a first value and below a second value, the process is repeated. If the difference value is above the first value and the second value, an indication that the printing engine needs servicing is provided.

Abstract: A method of detecting particles in an air flow is described. The method includes receiving a signal indicative of light intensity scattered from the air flow at a plurality of wavelengths and processing the signal indicative of the intensity of received light at each of the wavelengths and a corresponding wavelength dependent parameter to generate an output signal indicative of at least one characteristic of particles in the air flow. A particle detection system is also described.

Abstract: A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-? laser having a sweep range including a significant CO2 feature and substantially zero absorption regions. The sweep range may extend from about 2.708 ?m to about 2.7085 ?m. The processor may determine CO2 concentration as a function of the detector output signal. The processor may normalize the output signal as a function of the zero absorption regions. The system may include a plurality of EGR probes receiving light from a single laser. The system may include a separate detector for each probe. Alternatively, the system may combine the light returning from the different probes into a composite beam that is measured by a single detector. A unique modulation characteristic may be introduced into each light beam before combination so that the processor can discriminate between them in the composite beam.

Abstract: The present invention relates to a liquid lens for controlled adjustment of a variable focal length for a light transmitted through the liquid lens, comprising: a carrier having a light transmission portion for the light; a liquid drop which is highly transparent to the light and arranged on the carrier above the light transmission portion as part of a lens function; a ferrofluid which is arranged above the liquid drop so that it surrounds and contacts the liquid drop at least at those surfaces which are not directly in contact with the carrier; a magnet means arranged below the carrier and around the light transmission portion so as to draw the ferrofluid arranged on the carrier towards the carrier and keep it in its position on the carrier in all possible spatial positions of the liquid lens, which causes the liquid drop to be kept in its position on the carrier as well; and a temperature element arranged so as to be in thermal contact with the liquid drop in order to bring the liquid drop to a specific tem

Abstract: An optical liquid sensor utilizing a light source, fiber optic cables, a light detector and an irregular transparent surface is provided to detect the presence of liquid in mist and continuous form. The sensor may be integrated into a probe designed for insertion into a pressurized fluid process.

Abstract: A flow cytometer assembly includes a fluid controller configured to form a hydrodynamically focused flow stream including an outer sheath fluid and an inner core fluid. A coherent light source is configured to illuminate a particle in the inner core fluid. A detector is configured to detect a spatially coherent distribution of elastically scattered light from the particle excited by the coherent light source. An analyzing module configured to extract a three-dimensional morphology parameter of the particle from a spatially coherent distribution of the elastically scattered light.

Abstract: For cavity enhanced optical spectroscopy, the cavity modes are used as a frequency reference. Data analysis methods are employed that assume the data points are at equally spaced frequencies. Parameters of interest such as line width, integrated absorption etc. can be determined from such data without knowledge of the frequencies of any of the data points.

Abstract: A confocal optical detector including a light source generating a first optical beam along an axis; an optoelectronic sensor; an optical focusing device, which receives and focuses the first optical beam; and a hole, which receives the first optical beam and is arranged between the optoelectronic sensor and the optical focusing device. The optoelectronic sensor is arranged between the light source and the hole. In addition, the optoelectronic sensor and the optical focusing device are aligned along the axis.

Abstract: This smoke detector is provided with: a plurality of light emitting devices which emit light beams of mutually different wavelengths; and a plurality of scattered light receiving sections which receive, at a different scattering angle for each light beam of the respective wavelengths, scattered light generated due to the plurality of light beams emitted simultaneously from these light emitting devices impinging on smoke.

Abstract: A camera system for detecting the surroundings of a vehicle through a vehicle window pane (1), having a camera (2) having an image sensor (4), a first optical radiation (6) generated by the vehicle surroundings detectable by a sensor surface (10) of the image sensor (4), and a radiation source (3) for emitting a second optical radiation (7). At least a portion of the emitted second optical radiation (7) is detectable by the sensor surface (10) of the image sensor (4), and the portion of the second optical radiation (7) detected by the sensor surface (10) is a function of a state of window pane (1). The first and second optical radiation (6, 7) are jointly detectable via at least one partial area (8, 9) of the sensor surface (10). A method is also provided for detecting the surroundings of a vehicle employing the camera system.

Abstract: In accordance with certain embodiments, a smoke detector determines the presence of smoke particles outside its housing based on measurements of light detected at different wavelengths and corrected based on an ambient light level.

Abstract: A flow cytometry system includes a flow element through which a cell is transported in a flowing fluid. The flow element includes a bore bounded by a wall. A light source is configured to illuminate the cell. An optical system receives light emanating from the cell and directs at least some of the received light to a light sensor. The optical system includes a numerical-aperture-increasing lens at a wall of the flow element. At least some of the received light passes through the numerical-aperture-increasing lens. The flow cytometry system may also include a beam splitter that directs two wavelength bands of the emanating light such that light in two wavelength band preferentially reach different sensing locations via different paths. The system may also include an optical element placed in one of the paths, shifting a focal location of the affected path to compensate for chromatic aberration of the numerical-aperture-increasing lens.

Abstract: In the optical analysis technique of detecting an existence of a single particle is a sample solution with a confocal microscope or a multiphoton microscope according to the scanning molecule counting method of the present invention, the position of a light detection region is moved in the sample solution; the light intensity from the light detection region is measured so that light intensity data will be generated; a first occurrence probability in assuming a first condition that no single particles exist in the light detection region and a second occurrence probability in assuming a second condition that a single particle exists in the light detection region for a time variation of light intensity value on the light intensity data are computed; and a signal indicating each single particle is detected based on those occurrence probabilities, and thereby enabling improvements in the sensitivity and/or S/N ratio.

Abstract: The present disclosure relates to microfluidic devices adapted for facilitating cytometry analysis of particles flowing therethrough. In certain embodiments, the microfluidic devices allow light collection from multiple directions. In certain other embodiments, the microfluidic devices use spatial intensity modulation. In certain other embodiments, the microfluidic devices have magnetic field separators. In certain other embodiments, the microfluidic devices have the ability to stack. In certain other embodiments, the microfluidic devices have 3-D hydrodynamic focusing to align sperm cells. In certain other embodiments, the microfluidic devices have acoustic energy couplers. In certain other embodiments, the microfluidic devices have phase variation producing lenses. In certain other embodiments, the microfluidic devices have transmissive and reflective lenses. In certain other embodiments, the microfluidic devices have integrally-formed optics.

Abstract: A system for electro-hydrodynamically extracting energy from wind includes an upstream collector that is biased at an electric potential and induces an electric field. An injector introduces a particle into the electric field. The wind drag on the particle is at least partially opposed by a force of the electric field on the particle. A sensor monitors an ambient atmospheric condition, and a controller changes a parameter of the injector in response to a change in the atmospheric condition.

Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include patient line state detector for detecting whether a patient line is primed before it is to be connected to the patient. The patient line state detector can also the ability to detect whether a patient line has been properly mounted for priming. Both patient line presence/absence and fill state can be determined using an optical system, e.g., one that employs a single optical sensor.

Abstract: A sensor device has an optical sensor (1), a container (2) and a compartmentalizer (3) that temporarily divides the container into a main space (4) and an adjacent space (5), in which the optical sensor (1) is located. The gas volume in the direct vicinity of the optical sensor (1) is reduced, as are also, consequently, the reactive products generated by radiation sterilization. The adjacent space (5) can be united with the main space (4) after the sterilization as a result of the temporary compartmentalization. The optical sensor is suitable for implementation in containers and laboratory products, such as, for example, disposable bioreactors, that are sterilized by gamma radiation.

Abstract: A hydrocarbon presence sensor used to detect for the presence of a fuel in a buffer cavity of an inter-propellant seal. A sensor is formed on a rotor shaft in the buffer cavity and an optical imaging device is used to view a change in appearance of the sensor when a hydrocarbon forms on the surface. The sensor is formed from either an oil/fuel leak detection powder or an oil colorimetric developer. A white light source or a laser is reflected off of the sensor and an optical imaging device reads the reflected light to detect for a change in color or intensity of the light to indicate if a hydrocarbon is present on the sensor surface.

Abstract: A system and method for visualization of fluid flow, includes a light emitting arrangement configured to emit a focused light, a fluid channel configured to hold a fluid including a carrier liquid and a stimuli responsive polymer, wherein the fluid flows though the fluid channel, and an image recording arrangement. The light emitting arrangement is positioned to emit the focused light into a selected area of the fluid channel to interact with the flowing stimuli responsive polymer within the selected area. This results in a phase change to a portion of the stimuli responsive polymer. The image recording arrangement is positioned to record an image the portion of the phase changed stimuli responsive polymer made visible by the phase change.

Abstract: An example method includes introducing a movable inline inspection device into a pipeline, the movable inline inspection device having a housing that defines a conduit therein which provides fluid communication through the movable inline inspection device in the form of a bypass fluid, the conduit having one or more optical computing devices arranged thereon for monitoring the bypass fluid, wherein each optical computing device has at least one integrated computational element arranged therein, generating an output signal corresponding to a characteristic of the bypass fluid with at least one detector arranged within each optical computing device, receiving the output signal from each optical computing device with a signal processor communicably coupled to the at least one detector of each optical computing device, and determining with the signal processor the characteristic of the bypass fluid detected by each optical computing device.

Abstract: Systems and methods for detecting and/or identifying target cells (e.g., bacteria) using engineered transduction particles are described herein. In some embodiments, a method includes mixing a quantity of transduction particles within a sample. The transduction particles are associated with a target cell. The transduction particles are non-replicative, and are engineered to include a nucleic acid molecule formulated to cause the target cell to produce a series of reporter molecules. The sample and the transduction particles are maintained to express the series of the reporter molecules when target cell is present in the sample. A signal associated with a quantity of the reporter molecules is received. In some embodiments, a magnitude of the signal is independent from a quantity of the transduction particle above a predetermined quantity.

Abstract: Methods for using focused light scattering techniques for the optical sensing of biological particles suspended in a liquid medium are disclosed. The optical sensing enables one to characterize particles size and/or distribution in a given sample. This, in turn, allows one to identify the biological particles, determine their relative particle density, detect particle shedding, and identify particle aggregation. The methods are also useful in screening and optimizing drug candidates, evaluating the efficacy and dosage levels of such drugs, and in personalized medicine applications.

Abstract: A particle detecting system includes an airborne particle detecting device that detects scattered light and/or fluorescent light produced through illuminating with light a particle included in a gas, a gas inspection flow path that introduces, into the airborne particle detecting device, a particle included in a gas that is subject to inspection, an aerosol generating portion that generates an aerosol from a liquid that is subject to inspection, and a liquids inspection flow path that introduces a particle included in the aerosol into the airborne particle detecting device.

Abstract: An electro-hydrodynamic system that extracts energy from a gas stream, which includes an injector that injects a first species of particles having the same polarity into the gas stream, wherein particle movement with the gas stream is opposed by a first electric field; an electric field generator that generates a second electric field opposing the first, such that the net electric field at a predetermined distance downstream from the injector is approximately zero; an upstream collector that collects a second species of particles having a polarity opposite the first particle species; a downstream collector that collects the charged particle; and a load coupled between the downstream collector and the upstream collector, wherein the load converts the kinetic energy of the gas stream into electric power.

Abstract: A laser liquid level detection device is provided with linear optical magnification of a curved minor. The device includes a laser device, a CCD detecting device having a curved mirror and a CCD sensor and signal processing devices disposed in the laser device and the CCD detecting device. The laser device emits a laser beam to a surface level of a liquid, which reflects the beam to the CCD detecting device, and the curved mirror directs the reflected beam onto the CCD sensor. The shape of the curved mirror is determined by a polynomial curve function so as to linearly magnify a change in a height of the surface when the bounced beam reaches the CCD sensor. The liquid level detection device enables the position of the surface level of the liquid to be detectable in real time with high accuracy.

Abstract: A system for electro-hydrodynamically extracting energy from wind includes an upstream collector that is biased at an electric potential and induces an electric field. An injector introduces a particle into the electric field. The wind drag on the particle is at least partially opposed by a force of the electric field on the particle. A sensor monitors an ambient atmospheric condition, and a controller changes a parameter of the injector in response to a change in the atmospheric condition.

Abstract: A light scattering type smoke sensor includes a sensor body, light-emitter for emitting light toward an open smoke-sensing space and outputting a light-received signal according to the amount of scattering light received, and a fire judging unit for judging whether fire occurs or not on the basis of the amount of received light determined on the basis of the outputted light-received signal.

Abstract: A measurement unit used in an analyzing apparatus for measuring concentrations of component gases in a sample gas comprises a light emitting unit configured to emit a measurement light to the sample gas, a light receiving unit configured to receive the measurement light on a light receiving plane, a purge air introducing unit configured to introduce a purge air into a vicinity of at least one of the light emitting unit and the light receiving unit, and a condensing lens arranged in an optical path of the measurement light from the light emitting unit to the light receiving unit, the condensing lens being configured to condense the measurement light within the light receiving plane of the light receiving unit, a propagation path of the measurement light being varied by a thermal lens effect caused by a temperature difference between the sample gas and the purge air.

Abstract: A turbidity sensor for use in a machine for washing articles, e.g., a washing machine (400). The turbidity sensor comprises a light source (210) for emitting light. The emitted light has a radiant intensity which is variable. The sensor further comprises a light-sensitive element (220) for receiving light emitted from the light source (210). The light source (211) and the light-sensitive element (220) are positioned relative to each other so that, when the light source (210) is in operation, light emitted from the light source (210) can propagate through a washing liquid contained in the washing machine (400) on its way to the light sensitive element (220). The light-sensitive element (220) is configured to measure the radiant intensity of light received at the light-sensitive element (221). Furthermore, the sensor comprises a controller (230) which is communicatively coupled to the light source (210) and the light-sensitive element (220).

Abstract: A device (10) for determining the number of discrete events represented by an input signal is provided. The input signal may, for example, comprise pulses representing photons arriving at a detector. The device (10) may comprise a plurality, n, of comparator circuits (14) for reading the signal. For each comparator circuit (14) from i=1 to i=n, the comparator circuit (14) has a corresponding threshold value which the amplitude of a pulse representing i discrete events will exceed, but which the amplitude of a pulse representing i-1 discrete events will not exceed. Each comparator circuit (14) is arranged to output a first value when the input signal exceeds its threshold value and a second value when the input signal is less than its threshold value. The device (10) includes a counter (16) for counting the number of outputs of the first value that have been output by the plurality of comparator circuits (14).

Abstract: An arrangement for measuring process variables of a medium. The arrangement includes a housing embodied for accommodating a measuring apparatus for determining the physical and/or chemical process variable(s), wherein arranged in the housing is at least one window and at least the window contacts the medium, and wherein an oscillatory transducer is provided for transmitting sound waves, characterized in that the window is connected rigidly with the housing, the oscillatory transducer is arranged in a peripheral module having a module housing. The peripheral module is so arranged that the oscillatory transducer transmits the sound waves toward the window, wherein the sound waves pass through the module housing at an exit area, and the peripheral module is so arranged that medium is located in the region of the window and exit area.

Abstract: A method is provided for generating measurement parameters for a particle sample in a particle analyzer. The method includes, interrogating the particle sample with a triggering interrogator and one or more secondary interrogators respectively positioned along a length of an interrogation area, generating respective pulses based upon the interrogation of a first particle from the particle sample, determining a primary pulse detection window based upon a triggering pulse, determining a search interval to find a secondary pulse based upon factors including the primary pulse detection window and a laser delay, adjusting the search interval for laser delay variation dynamically based on the interrogation of the first particle, identifying the secondary pulse in the adjusted search interval, and processing the secondary pulse to determine a peak value of the secondary pulse. Corresponding apparatus are also provided.

Abstract: A fluid overfill detection and control system for controlling the transfer of fluid into a transport vehicle having multiple fluid compartments includes a plurality of overfill sensors that are connected in series with one another and that each produces an output pulse when the fluid level in its associated compartment is below a threshold level. A diagnostic line connected to each of the overfill sensors provides a diagnostic signal indicative of the number of overfill sensors that generate an output pulse, while a module on the vehicle provides an indication of the total number of overfill sensors located in the vehicle. To prevent a hazard due to the possible bypass of a overfill sensor, the controller compares the overfill sensor count signal to the diagnostic signal and inhibits the transfer of fluid into the vehicle if the values do not match.

Abstract: A method detects metallic atoms in a fluid. The method includes: placing, in a zone sheltered from light, a photodiode comprising a photosensitive surface in contact with a fluid to analyze; heating the photosensitive surface of the photodiode to a temperature sufficient to allow metallic atoms deposited on the photosensitive surface to migrate through this surface; acquiring a signal relative to the lighting of the photodiode; and determining, from the acquired signal, a measurement representative of a contamination status by metallic atoms of the photodiode.

Abstract: An oscillating liquid lens and imaging system and method employing the lens are provided. The liquid lens includes a substrate with a channel opening extending through the substrate. A liquid drop is disposed within the channel and is sized with a first droplet portion, including a first capillary surface, protruding away from a first substrate surface, and a second droplet portion, including a second capillary surface, protruding away from a second substrate surface. The liquid lens further includes an enclosure at least partially surrounding the substrate, and including a chamber. The liquid drop resides within the chamber, and the liquid lens includes a second liquid disposed within the chamber in direct or indirect contact with the liquid drop, and the liquid lens further includes a driver for oscillating the liquid drop within the channel.

Abstract: A sensor assembly is disclosed that includes a hollow casing having a radiation entrance opening. A radiation-transmissive optic is at the radiation entrance opening. A substrate is inside and sealed against the hollow casing. An optical sensing element is coupled to the substrate and configured to sense radiation that has passed through the radiation-transmissive optic. A method of manufacturing the sensor assembly also is disclosed.

Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include patient line state detector for detecting whether a patient line is primed before it is to be connected to the patient. The patient line state detector can also the ability to detect whether a patient line has been properly mounted for priming. Both patient line presence/absence and fill state can be determined using an optical system, e.g., one that employs a single optical sensor.

Abstract: Systems and methods for determining liquid depth information in a condensate pan of a climate control unit are provided. The systems and methods radiate a light beam into a liquid contained in a condensate pan associated with a climate control unit. The light beam is detected at a point of the condensate pan that is below a surface of the liquid. Information related to the depth of the liquid is determined based at least in part on the detected light beam. The systems and methods disclosed herein can determine if liquid depth in a condensate pan is greater than a threshold depth and can control evacuation of the liquid from the condensate pan.