Abstract: An explosion-proof thermal imaging system is provided. The system include an explosion-proof housing having a window that is configured to allow thermal radiation therethrough. An infrared camera is positioned within the explosion-proof housing and is disposed to receive and image thermal radiation that passes through the window. An emissivity target is disposed within a field of view of the infrared camera, but on an opposite side of the window from the infrared camera. A temperature sensor is operably coupled to the infrared camera and is configured to provide an indication of temperature proximate the emissivity target.

Abstract: A thermal imaging system is provided. The thermal imaging system includes an explosion-proof housing with an optical window configured to contain an explosive pressure. The optical window allows electromagnetic thermal energy to pass. A thermal imaging sensor is disposed within the explosion-proof housing. Thermal imaging electronics are coupled to the thermal imaging sensor and configured to provide at least one thermal image based on a signal from the thermal imaging sensor. A lens assembly is disposed at least in front of the optical window external to the explosion-proof housing. A composite optical window for thermal imaging is also provided. In another embodiment, a thermal imaging system includes an explosion-proof housing having an optical window configured to contain an explosive pressure. An infrared (IR) camera is disposed within the explosion-proof housing. A reflector reflects electromagnetic thermal energy to the IR camera, but prevent an object from impacting the optical window.

Abstract: A thermowell assembly for measuring a process temperature includes an elongate thermowell having a proximal end and a distal end. A bore extends between the two ends with the thermowell assembly configured to extend into a process fluid. An infrared sensor detects infrared radiation from the distal end through the bore of the thermowell and responsively provides a sensor output. A configuration is provided in which infrared radiation received by the infrared sensor from a wall of the bore is reduced and or radiation received from the distal end of the bore is increased.

Abstract: A thermal imaging system is provided. The thermal imaging system includes an explosion-proof housing with an optical window configured to contain an explosive pressure. The optical window allows electromagnetic thermal energy to pass. A thermal imaging sensor is disposed within the explosion-proof housing. Thermal imaging electronics are coupled to the thermal imaging sensor and configured to provide at least one thermal image based on a signal from the thermal imaging sensor. A lens assembly is disposed at least in front of the optical window external to the explosion-proof housing. A composite optical window for thermal imaging is also provided. In another embodiment, a thermal imaging system includes an explosion-proof housing having an optical window configured to contain an explosive pressure. An infrared (IR) camera is disposed within the explosion-proof housing. A reflector reflects electromagnetic thermal energy to the IR camera, but prevent an object from impacting the optical window.

Abstract: An explosion-proof thermal imaging system is provided. The system include an explosion-proof housing having a window that is configured to allow thermal radiation therethrough. An infrared camera is positioned within the explosion-proof housing and is disposed to receive and image thermal radiation that passes through the window. An emissivity target is disposed within a field of view of the infrared camera, but on an opposite side of the window from the infrared camera. A temperature sensor is operably coupled to the infrared camera and is configured to provide an indication of temperature proximate the emissivity target.

Abstract: A thermowell assembly for measuring a process temperature includes an elongate thermowell having a proximal end and a distal end. A bore extends between the two ends with the thermowell assembly configured to extend into a process fluid. An infrared sensor detects infrared radiation from the distal end through the bore of the thermowell and responsively provides a sensor output. A configuration is provided in which infrared radiation received by the infrared sensor from a wall of the bore is reduced and or radiation received from the distal end of the bore is increased.

Abstract: A sighting device is provided which is used to produce an optically perceptible target marking on an object. The sighting device includes one or more light sources for providing at least two sighting rays. A precision target marking is produced in such a manner that each of the sighting rays is directed onto a respective optical component enabling both of the sighting rays to be split on a respective illumination plane in such a manner that at least two illumination planes intersect at an angle. The point of intersection forms the target marking. A measuring, working and/or operating device is optionally provided which can be used with or without contact and which interacts with an object of any type at a predetermined target location. The target location can be detected by means of the inventive sighting device.

Abstract: A device for measuring the temperature of a measured spot of a measured object without contacting the measured object is provided. The device includes a detector on which electromagnetic radiation emanating from the measured spot is projected by an optical imaging system. A sighting device for marking the position and/or the size of the measured spot includes at least two light sources. Each of the two light sources provides a respective sighting ray.

Abstract: A radiometer includes an integrally mounted digital camera aligned to image the energy zone of the radiometer. When digital photographs are taken they are time stamped and stored in memory. The images may be viewed on a viewer integrated into the radiometer digital camera system or downloaded to a computer for formatting or viewing.

Abstract: A device for measuring the temperature of a measured spot of a measured object without contacting the measured object is provided. The device includes a detector on which electromagnetic radiation emanating from the measured spot is projected by an optical imaging system. A sighting device for marking the position and/or the size of the measured spot includes at least two light sources. Each of the two light sources provides a respective sighting ray.

Abstract: A sighting device is provided which is used to produce an optically perceptible target marking on an object. The sighting device includes one or more light sources for providing at least two sighting rays. A precision target marking is produced in such a manner that each of the sighting rays is directed onto a respective optical component enabling both of the sighting rays to be split on a respective illumination plane in such a manner that at least two illumination planes intersect at an angle. The point of intersection forms the target marking. A measuring, working and/or operating device is optionally provided which can be used with or without contact and which interacts with an object of any type at a predetermined target location. The target location can be detected by means of the inventive sighting device.

Abstract: A radiometer includes an integrally mounted digital camera aligned to image the energy zone of the radiometer. When digital photographs are taken they are time stamped and stored in memory. The images may be viewed on a viewer integrated into the radiometer digital camera system or downloaded to a computer for formatting or viewing.

Abstract: Device for contactless temperature measurement of an object with an optical system which images into the finite and a detector, wherein an image of the detector is imaged by the optical system along an optical axis onto a measurement spot on the object in such a way that the image of the detector reduces from the optical system to a sharp point measurement spot and then enlarges, and also with a sighting arrangement which identifies the outer limit of the measurement spot by means of visible sighting rays. Each sighting ray is aligned obliquely with respect to the optical axis in such a way that each sighting ray can be used both before and also after the sharp point measurement spot to identify the measurement spot.

Abstract: Device for contactless temperature measurement of an object with an optical system which images into the finite and a detector, wherein an image of the detector is imaged by the optical system along an optical axis onto a measurement spot on the object in such a way that the image of the detector reduces from the optical system to a sharp point measurement spot and then enlarges, and also with a sighting arrangement which identifies the outer limit of the measurement spot by means of visible sighting rays. Each sighting ray is aligned obliquely with respect to the optical axis in such a way that each sighting ray can be used both before and also after the sharp point measurement spot to identify the measurement spot.

Abstract: A pyrometer for measuring the electromagnetic radiation emitted by an object comprises a first detector to which the radiation is delivered through an optical system as well as a second detector to which the radiation emanating from a reference element is delivered through the same optical system. The temperature of the reference element is monitored and a rotary optical modulator periodically enables and disables the delivery of radiation to the detectors. The output signals from the two detectors are processed to determine the difference therebetween. The sensed temperature of the reference element is taken into account as a part of determining the difference between the two detector output signals. In this way it is possible for the characteristic radiation of the optical system largely to be suppressed. The optical modulator comprises a semi-circular disk having a polyethylene terephthalate substrate coated on each side with metal. The disk is rotated through 180.degree.

Abstract: A pyrometric measurement method and a multi-channel pyrometer for determining the temperature T.sub.o of surfaces with different emissivities by measuring the spectral signal voltages U.sub.j at j=1 to n effective wavelengths. The invention obtains, by infrared measurements at at least two effective wavelengths, information concerning the object temperature and the emissivity relationships actually existing for selected surface materials, such as those which are typical for a user. The spectral signal voltages U.sub.ij are ascertained as a function of the difference U.sub.oj -U.sub.uj for a discrete number i=1 to n of surface materials differing in emissivity and the hypothetically possible spectral voltages U.sub.oij and, from these, the probable object temperature T.sub.o and the probable applicable surface material are determined from the measured spectral signal voltages U.sub.j, using the functional relationship that has been established for each emissivity .epsilon..sub.ij.

Abstract: A method for the contactless measuring of the temperature of objects with a hanging proportion of differently emitting surfaces having the same temperature by means of a multi-channel pyrometer, for example, for pyrometric measurements, on which there are different amounts of residues of the material to be processed. The spectral signal voltages U.sub.ij are ascertained as a function of the difference U.sub.oj -U.sub.uj for the i=1 to m surfaces of the object differing in emissivity, at least m spectral signal voltages U.sub.j are measured and the object temperature is determined from the additive superimposition of the m radiation sources in the measurement location.