The present disclosure relates to an article for detecting a disinfectant via visual feedback. The article have a first substrate with a first major surface and opposite ends. The article also comprises a process indicator disposed on at least a portion of the first major surface. The process indicator reacts with at least one liquid disinfectant selected from the group consisting of glutaraldehyde, ortho-phthalaldehyde, hydrogen peroxide, peroxyacetic acid, and combinations thereof. The process indicator can be formed from a synthetic amine-containing polymer derived from polyethylenimine (PEI). The article can have a flow channel that is formed by a portion of the process indicator and that extends between the opposite ends. The disclosure also relates to a kit containing the article as well as a method of using the article in a disinfection process. The article is used to diagnose issues in an automated endoscope reprocessors (AERs).

In a sensor unit, a sensor element having an optical behavior that depends on at least one analyte is in diffusive contact with an auxiliary medium, which is present in a reservoir in the sensor unit, via a membrane. The reservoir and the membrane, on the one hand, and sensor element, on the other hand, can be removed from one another in order to place the sensor unit in a measurement state. The auxiliary medium can serve to wet the sensor element during storage of the sensor unit or also for calibrating the sensor element.

Systems and methods for detecting determining a volume of urine in an absorbent article such as a diaper. A diaper loading application obtains a first measurement of ambient light received from a photodetector while a light source is off and a second measurement from the photodetector while the light source is transmitting light on an absorbent article. The application determines a normalized measurement of light reflected from an absorbent article by removing an ambient light signal from the second measurement based on the first measurement. The application determines, from the normalized measurement, a presence of urine in the absorbent article. The application further determines an estimated volume of urine in the absorbent article, wherein the determining is based on an elapsed time since the presence of urine and an activity state of an infant wearing the absorbent article.

A thermal history detection label for detecting a thermal history over a temperature range to be monitored while suppressing an increase in label size is provided. The thermal history detection label is configured to detect a thermal history by the permeation of a molten permeating material into a permeation body, and the thermal history detection label includes a permeating material that integrally includes a first permeating material having a first melting point and a second permeating material having a second melting point higher than the first melting point, and a permeation body into which the permeating material permeates.

An optochemical sensor comprises a measuring element excitable by the light of an excitation light source and in contact with a medium to be measured, and a measuring arrangement including at least one excitation light source and a detector as well as a hood separating the measuring arrangement from the measuring element, wherein the excitation light source and the detector are fixed to a base plate arranged in parallel with the measuring element, the hood, the excitation light source and the detector are separated from one another by at least a portion of the material thickness of the hood, and light from the excitation light source through an optical waveguide impinges on the measuring element at such an angle that fluorescence light emitted by the measuring element impinges perpendicularly on the detector.

Example embodiments of the present invention comprise an analyte sensing patch, comprising a substrate, and a sensing agent disposed on the substrate such that analyte can encounter the sensing agent through a side of the patch disposed adjacent the skin of a subject but not through a side of the patch disposed away from the skin of the subject. Example embodiments of the present invention comprise an analyte sensing patch, comprising a substrate, a sensing material disposed on the substrate in a first region thereof, an adhesive disposed on the substrate in a second region thereof, wherein the second region surrounds the first region, wherein the sensing agent undergoes a change in a discernible characteristic responsive to encounter with a predetermined analyte.

A test strip holder may include an upper body, a lower body, and a mating portion. The upper body may include a first recess. The lower body may include a second recess. The mating portion may fixedly mate the upper body and the lower body. The first recess and the second recess form an internal volume when the upper body and lower body are mated.

Among other things, certain embodiments of the present disclosure are related to devices and methods of performing biological and chemical assays, such as but not limited to pH measurement of bio/chemical samples.

A hydrogen sensor for detecting hydrogen in a fluid in physical contact with the sensor comprises a sensing element, a first protection layer, provided to prevent contact of the sensing element with a sensor poisoning gas in the fluid, wherein the first protection layer comprises PMMA. Further, a hydrogen detection system, an electrical device having such a system and a method for producing a sensor are provided.

Embodiments for local and safe testing of injection fluids by drawing a sample of injection fluid into a local test chamber while drawing fluid to be tested into a syringe assembly and testing the sample of the injection fluid are disclosed. A fluid test device can include a syringe assembly, a plunger assembly, and a test module. The test module can determine information about fluid in a syringe assembly when the fluid enters a test chamber in the test module. Fluid may enter the test chamber through a one-way valve while a plunger in the plunger assembly is moved in a suction stroke to draw fluid into an interior of the syringe assembly. Fluid may not enter or be expelled from the test chamber when the plunger does not move or is moved in a compression stroke to expel fluid from the syringe assembly.