The present invention relates to a self-cleaning probe for performing optical measurements in a gas or liquid flow. The probe comprises a measuring cell defining a passage for the gas or liquid to be measured to pass through, and includes minimum a first and second optical interface on opposite sides of the passage. The probe further comprises at least one optical light source emitting an optical signal and a detector for receiving an optical signal having propagated partly or fully through the gas or liquid flow from the first to the second interface. All optical interfaces are acoustically coupled to one acoustic transducer connected to a power source, adapted to produce vibrations in the frequency range of 5 kHz-1 MHz, the vibrations being substantially perpendicular to the plane of the interfaces and the acoustic energy exceeding the cavitation threshold in a liquid, so as to remove deposits on the optical interfaces.

An open path optical sensing system having an ultrasonic cleaner. The system includes at least one ultrasound transducer which is configured to propagate ultrasonic waves across exposed surfaces of optical components of the optical sensing system. The ultrasonic waves create tiny vibrations on the exposed surfaces of the optical components which clean the surfaces of environmental pollutants and prevent environmental pollutants from accumulating on the surface. The ultrasonic waves may have a frequency that is substantially different than the modulation frequency of a modulated laser light beam that is generated by a laser of the open path optical sensing system. The surfaces of a plurality of optical components may be cleaned by the ultrasonic waves of a single ultrasound transducer. A plurality of ultrasound transducers may propagate waves on a single optical component.

A method and system for automated ultrasonic cavitation cleaning in a liquid analysis system and measurement of a process liquid contained inside a container or flowing in a process line by means of an inline or side-stream optical system. The method and system can be used in high pressure subsea conditions by means of an automated piston driven system for isolating the analysis chamber and achieving low pressure conditions inside the analysis chamber during the cavitation cleaning mode.

A system for determining at least one property of a fluid and ensuring measuring surfaces of the system in contact with the fluid remain free of contaminants, includes a housing within which at least one measuring surface is located. The fluid to be measured flows through the housing and contacts the measuring surface. A signal generating device operably associated with the surface provides signals indicative of the at least one fluid property. A transducer is operably associated with the housing and causes agitation of the fluid flowing through the housing so that the measuring surface can be cleaned even during fluid measurement.

Equipment for measuring the content of organic substances in water emulsions and solutions, characterized by the fact that a sonotrode is placed in the body, near the inlet of the sample into the measuring cell, whereas the body of the instrument contact reductions connected to clamp the cuvette with a seal for mounting the cuvette, a source of UV light with a wavelength of 1, a source of UV light with a wavelength of 2, whereas the device is equipped with a broad spectrum turbidimetric photosensor for sensing the signal partially absorbed by the sample, the device being further equipped with a broad-spectrum photosensor to refer signals 1, 2 positioned in such a way that the beams from the sources illuminate them directly, perpendicularly to the optical axis of the sources of UV light placed a broad-spectrum photosensor, to detect any reflection from liquid particles of the emulsion or solids.

The method and apparatus as shown in the present invention is to measure the absorption of light by material contained in a liquid. A transmitted signal is sent through a measurement window to a measurement chamber to a target point just inside the measurement window. The reflected signal indicates the amount of light absorbed by a material in the measurement chamber which allows for the amount of materials in a liquid to be determined. Adjustments are made through an optical block and a light control molecule to correct for variations in light intensity.

The present invention relates to a heating enhanced structure for a photo-sensitive sensing device with automatic foreign object removal, particularly involving the use of a structure made of flexible and rigid materials for sealing the photo-sensitive sensing device and transmitting vibrations generated by piezoelectric elements. The photo-sensitive sensing device includes a housing, a transparent protective cover, a photo sensor, a lens module, a sealing material with flexibility and rigidity, and a piezoelectric element. The device is further equipped with a heating element to optimize the automatic foreign object removal function, reduce the frequency of piezoelectric element usage, thereby lowering power consumption, extending the operational lifespan, and improving the efficiency of removing small liquid droplets.

A method of keeping a viewing area through a transparent element of an optical monitoring device clear, comprising: forming a closed film of a liquid on the transparent element, and coupling ultrasonic waves into the transparent element. The loosening of contaminations and/or adhesions to the transparent element is promoted by the ultrasonic waves coupled into the liquid film and/or the transparent element.

A system is presented for evaluating grain in a grain handling system. The system includes a sensor system and a sample conveyor system. In one or more arrangements, the sensor system is operatively connected to the grain handling system and includes an optical sensor. The sample conveyor system is configured to collect samples of grain in the grain handling system, deliver the samples of grain to the sensor system, and remove the samples of grain from the sensor system. The sensor system is configured to measure characteristics of the samples of grain delivered to the sensor system by the sample conveyor system. In one or more arrangements, the system includes a cleaning system configured to clean the optical sensor, the lens; and/or other components of the sensor system. In one or more arrangements, the system includes a recalibration system configured to recalibrate the optical sensor.

An optical probe includes an elongate hollow probe body, an optical window mounted at a distal end of the probe body for transmitting light therethrough, an ultrasonic transducer mounted within the probe body for applying ultrasonic vibrations to the optical window for cleaning the optical window, and one or more light guides located within the probe body for transmitting light through the optical window to a measurement region and/or for receiving light transmitted through the optical window from the measurement region. The ultrasonic transducer is located within the distal end of the probe body adjacent the optical window to transmit ultrasonic vibrations directly from the ultrasonic transducer to the window.