This present disclosure provides a multi-ply radiation dosage indicator, which includes a first ply having two visible readable indicia thereon. The dual radiation sensitive zones are capable of changing opacity in response to exposure radiation. Each radiation sensitive zone can respond to an irradiation dose in tandem or independent of one another. Once the radiation sensitive zone exceeds the design exposure threshold, the visibility of the indicia is altered thereby providing an indication of irradiation exposure. The radiation sensitive zone may either be transparent or opaque and can change its opacity in response to exposure to radiation exceeding a predetermined threshold so as to change the visibility of the indicia.

A data collection device includes a housing and a data collection unit located in the housing. A power unit is located in the housing and is operably connected to the data unit to provide power for operation of the data unit. An irradiation sensor is located at the data collection device to detect exposure of the data collection device to irradiation. An irradiation sensor includes a thermal energy absorbing material and a thermal energy sensitive material in thermal communication with the thermal energy absorbing material. The thermal energy sensitive material is characterized by a change in color when exposed to a selected degree of thermal energy due to irradiation.

A data collection device includes a housing and a data collection unit located in the housing. A power unit is located in the housing and is operably connected to the data unit to provide power for operation of the data unit. An irradiation sensor is located at the data collection device to detect exposure of the data collection device to irradiation. An irradiation sensor includes a thermal energy absorbing material and a thermal energy sensitive material in thermal communication with the thermal energy absorbing material. The thermal energy sensitive material is characterized by a change in color when exposed to a selected degree of thermal energy due to irradiation.

The present disclosure relates, according to some embodiments, to a wearable UV sensor for detecting a dose of an electromagnetic radiation, the wearable UV sensor comprising: (a) a polymer substrate comprising at least one polymer and at least one UV radiation exposure indicator; and (b) an adhesive, wherein exposure of the wearable UV sensor to the dose of the electromagnetic radiation produces a photochromic change in the polymer substrate. The present disclosure also relates to a method for determining a magnitude of a dose of UV radiation exposure, the method comprising: providing a wearable UV sensor comprising a polymer substrate, a UV radiation exposure indicator, and optionally an adhesive layer; exposing the wearable UV sensor to at least one dose of an electromagnetic radiation to form an irradiated wearable UV sensor, wherein the exposing results in a photochromic change by the wearable UV sensor; and determining the magnitude of the at least one dose of electromagnetic radiation.

The present disclosure relates, according to some embodiments, to a wearable UV sensor for detecting a dose of an electromagnetic radiation, the wearable UV sensor comprising: (a) a polymer substrate comprising at least one polymer and at least one UV radiation exposure indicator; and (b) an adhesive, wherein exposure of the wearable UV sensor to the dose of the electromagnetic radiation produces a photochromic change in the polymer substrate. The present disclosure also relates to a method for determining a magnitude of a dose of UV radiation exposure, the method comprising: providing a wearable UV sensor comprising a polymer substrate, a UV radiation exposure indicator, and optionally an adhesive layer; exposing the wearable UV sensor to at least one dose of an electromagnetic radiation to form an irradiated wearable UV sensor, wherein the exposing results in a photochromic change by the wearable UV sensor; and determining the magnitude of the at least one dose of electromagnetic radiation.

Provided is a method and an apparatus for indicating minimum exposure of a surface to UVC light emitted by a source during a decontamination process to achieve a desired level of pathogen reduction. The apparatus includes a photochromic material to be applied to, or applied adjacent to the surface. The photochromic material is to exhibit a visible response to receiving the minimum exposure to the UVC light, and exhibit the visible response to a lesser extent after the photochromic material ceases to be exposed to the UVC light emitted by the source. A protective layer of material that is substantially transparent to the UVC light emitted by the source is positioned over the photochromic material to be disposed between the source and the photochromic material during the decontamination process.

A device for assessing sunscreen coverage on a person includes a casing a lens assembly extending from about a front facing surface of the casing and allowing transmissivity to light energy in a wavelength range of about 300 to about 400 nm. A filter is in optical communication with the lens assembly and having a high optical density above about 390 nm and a low optical density below about 390 nm. A sensor is in optical communication with the filter, the sensor having a signal/noise ratio that is greater than about 36 db. A controller is configured for receiving input from a user to control the device. A display screen may be in communication with a controller for displaying an image associated with the filtered light.

Apparatus for measuring a dosage of disinfection light. The apparatus includes: a measurement pad including a photochromic material that changes its color in response to a dosage of disinfection light incident on the measurement pad; and a dosage scale bar having a plurality of units that have different colors, wherein the dosage of the disinfection light is determined by comparing the color of the measurement pad with the different colors of the plurality of units.

The present disclosure relates, according to some embodiments, to a method of determining a quantitatively measured photoprotection of a photoprotective composition, the method comprising: (a) distributing the photoprotective composition in a position in between a drawdown bar and at least one substrate to produce a distributed photoprotective composition; (b) drawing down the distributed photoprotective composition to a thickness on at least one substrate to produce a drawn down sample film; (c) drying the drawn down sample film to produce a dried sample film; (d) measuring a UV absorption of the dried sample film to produce a UV absorption spectrum; (e) determining the quantitatively measured photoprotection of the photoprotective composition from the UV absorption spectrum. The present disclosure relates, according to some embodiments, to a method of determining a quantitatively measured photoprotection of a photoprotective composition, the method comprising: (a) spraying at least one coat of the photoprotective composition to a thickness on at least one surface of a substrate to produce a spray coated substrate sample; (b) drying the spray coated substrate sample to produce a dried sample film; (c) measuring a UV absorption of the dried sample film to produce a UV absorption spectrum; and (d) determining the quantitatively measured photoprotection of the photoprotective composition from the UV absorption spectrum.

The present disclosure relates, according to some embodiments, to a method of determining a quantitatively measured photoprotection of a photoprotective composition, the method comprising: (a) distributing the photoprotective composition in a position in between a drawdown bar and at least one substrate to produce a distributed photoprotective composition; (b) drawing down the distributed photoprotective composition to a thickness on at least one substrate to produce a drawn down sample film; (c) drying the drawn down sample film to produce a dried sample film; (d) measuring a UV absorption of the dried sample film to produce a UV absorption spectrum; (e) determining the quantitatively measured photoprotection of the photoprotective composition from the UV absorption spectrum. The present disclosure relates, according to some embodiments, to a method of determining a quantitatively measured photoprotection of a photoprotective composition, the method comprising: (a) spraying at least one coat of the photoprotective composition to a thickness on at least one surface of a substrate to produce a spray coated substrate sample; (b) drying the spray coated substrate sample to produce a dried sample film; (c) measuring a UV absorption of the dried sample film to produce a UV absorption spectrum; and (d) determining the quantitatively measured photoprotection of the photoprotective composition from the UV absorption spectrum.