An indicator device comprising a first carrier material; a first pigment disposed in the first carrier material, the first pigment capable of being degraded by exposure to UV radiation; and wherein the first carrier material is configured so as to have a varying thickness such that upon exposure to UV radiation, a visible change in the pigment will occur which will result in a varying visible change over a first surface of the first carrier material.

Disclosed is an apparatus for cable inspection, which inspects an aerial cable used in electric power transmission, the apparatus including: first and second plates spaced apart from each other; a lower clamp disposed on the first plate; an upper clamp disposed on the second plate to face the lower clamp and having a through hole in a vertical direction; a distance adjustment unit configured to adjust a separation distance between the first and second plates; an indenter indented in a coating of the cable through the through hole; a first load cell configured to measure an indentation force of the indenter and to output a signal corresponding to the measured indentation force; a second load cell disposed under the lower clamp and configured to measure pressure applied to the cable and to output a signal corresponding to the measured pressure; and an indenter moving unit configured to control movement of the indenter. According to the present invention, deterioration of a cable is measured using a plurality of sensors so that measurement accuracy can be improved and measurement of deterioration of the cable can be performed in a state in which the cable is disposed.

An apparatus for artificial weathering or lightfastness testing of samples or for simulating solar radiation, the apparatus comprising a weathering chamber, a UV light source provided in the weathering chamber, and a fluorescent material arranged to be radiated by a UV radiation emitted by the UV light source, the fluorescent material being configured to emit a fluorescent radiation comprising spectral emission characteristics similar to natural solar radiation.

An apparatus for artificial weathering or lightfastness testing of samples comprises a weathering chamber, a first light source provided in the weathering chamber, the first light source comprising one or more fluorescent UV lamps each comprising an emission spectrum with a maximum wavelength below a predetermined wavelength, and a second light source provided in the weathering chamber, the second light source comprising one or more light emitting diodes each comprising an emission spectrum with a maximum wavelength above the predetermined wavelength.

A method of determining degradation of a thermoplastic when exposed to light and heat includes illuminating the thermoplastic with a desired wavelength of light at a desired irradiance while maintaining the ambient air surrounding the thermoplastic at a desired temperature. The method is useful to measure the discoloration rate of transparent, translucent and opaque thermoplastics such as polycarbonates, the discoloration rate being determined by transmission or reflectance spectra of transmitted or reflected white light through or from the thermoplastic.

A method of determining degradation of a thermoplastic when exposed to light and heat includes illuminating the thermoplastic with a desired wavelength of light at a desired irradiance while maintaining the ambient air surrounding the thermoplastic at a desired temperature. The method is useful to measure the discoloration rate of transparent, translucent and opaque thermoplastics such as polycarbonates, the discoloration rate being determined by transmission or reflectance spectra of transmitted or reflected white light through or from the thermoplastic.

An accelerated deterioration test apparatus (101) according to this invention includes a container (10) configured to be able to accommodate a sample (200) as a subject of an accelerated deterioration test for accelerating deterioration of the sample (200) as the test subject by using a deterioration factor for deteriorating the sample; and an introducer/collector (120) connected to the container (10) to introduce a gas or a liquid as the deterioration factor into the container (10) and to collect, during the accelerated deterioration test, a product that appears with the deterioration of the sample (200).

A gas turbine engine fuel system includes a fuel delivery system, an oil cooling subsystem, a fuel delivery conditioning system, and one or more optical coking sensors. The fuel delivery subsystem delivers fuel to a gas turbine engine and the oil cooling subsystem receives heated oil from the gas turbine engine. The fuel delivery conditioning system includes a fuel/oil cooler that is in fluid communication with the fuel delivery subsystem to receive the fuel and is in fluid communication with the oil cooling subsystem to receive the heated oil. The fuel/oil cooler transfers heat from the oil to the fuel to increase a temperature of the fuel, and the optical coking sensors output a signal indicating a thermal stress of the fuel that occurs with a changing temperature of the fuel. A controller receives the voltage signal determines an onset of coking in the fuel based on the signal.

A gas turbine engine fuel system includes a fuel delivery system, an oil cooling subsystem, a fuel delivery conditioning system, and one or more optical coking sensors. The fuel delivery subsystem delivers fuel to a gas turbine engine and the oil cooling subsystem receives heated oil from the gas turbine engine. The fuel delivery conditioning system includes a fuel/oil cooler that is in fluid communication with the fuel delivery subsystem to receive the fuel and is in fluid communication with the oil cooling subsystem to receive the heated oil. The fuel/oil cooler transfers heat from the oil to the fuel to increase a temperature of the fuel, and the optical coking sensors output a signal indicating a thermal stress of the fuel that occurs with a changing temperature of the fuel. A controller receives the voltage signal determines an onset of coking in the fuel based on the signal.

A method for evaluating UV protection performance of a cosmetic includes a preparation step of preparing a measurement sample for evaluating UV protection performance of a target cosmetic, wherein the preparation step is a step including forming a uniform cosmetic application layer of the cosmetic on an UV-transmittance-measurement transparent substrate surface, by using a surface of an applicator having a layer made of a non-metal material constituting the surface that has an oil adhesion prevention property. According to the method, an UV transmission ratio of the cosmetic can easily and accurately be evaluated.