Door Contact Sensors
Door Contact Sensors - Related Videos
09:14
Glovebox and Impurity Sensors
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University The glovebox provides a straightforward means to handle air- and moisture-sensitive solids and liquids. The glovebox is what it sounds like: a box with gloves attached to one or more sides, which allows the user to perform manipulations within the glovebox under an inert atmosphere. For manipulations under inert atmospheres, chemists can choose between Schlenk or high-vacuum techniques and a glovebox. Schlenk and...
09:30
Bacterial Detection & Identification Using Electrochemical Sensors
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Cited by 6 •
2013
We describe an electrochemical sensor assay method for rapid bacterial detection and identification. The assay involves a sensor array functionalized with DNA oligonucleotide capture probes for ribosomal RNA (rRNA) species-specific sequences. Sandwich hybridization of target rRNA with the capture probe and a horseradish peroxidase-linked DNA oligonucleotide detector probe produces a measurable amperometric current.
01:13
Contact Angle
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2023
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces. The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
10:23
Glutamine Flux Imaging Using Genetically Encoded Sensors
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Cited by 7 •
2014
This article will demonstrate how to monitor glutamine dynamics in live cells using FRET. Genetically encoded sensors allow real-time monitoring of biological molecules at a subcellular resolution. Experimental design, technical details of the experimental settings, and considerations for post-experimental analyses will be discussed for genetically encoded glutamine sensors.
08:25
Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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Cited by 2 •
2022
Contact hypersensitivity (CHS) is a murine experimental model of allergic contact dermatitis (ACD). CHS is based on sensitization with reactive hapten by painting the shaved skin of the chest and abdomen, with a subsequent ear skin challenge with a diluted hapten, causing a swelling reaction that is assessed in various ways.
FAQs
A magnet paired with a reed switch or Hall-effect sensor responds to changes in the local magnetic field as the door moves. That change produces an electrical signal, which a monitoring system can time-stamp. The resulting record links a physical opening or closing event to a specific time, allowing researchers to quantify movement-related activity.
The sensor directly indicates a change in the opening’s state, such as movement between open and closed conditions. Interpreting that signal as an entry or exit requires behavioral and spatial context, including which side of the opening is relevant and how the monitored area is arranged. Thus, the recorded signal and its interpretation are related but distinct.
Their unobtrusive operation allows movement-related events to be recorded without continuous visual observation. This reduces the need for an observer to watch the opening and can support measurement across routine activity periods. Their low cost also makes them practical for studies focused on repeated entries, exits, room use, or occupancy patterns.
A basic workflow pairs the magnet with a reed switch or Hall-effect sensor at the monitored opening, connects the sensor to a system that records electrical signals, and attaches time information to detected changes. Researchers can then organize the event record around entries, exits, room use, or other movement patterns relevant to the study.
These sensors can support questions about how often animals enter or leave spaces, how people use rooms, and whether activity follows a repeated routine. They also provide a way to examine movement-related responses when environmental or experimental conditions change. The same basic event record can therefore serve animal behavior, occupancy, and routine-focused studies.
Time-stamped events place openings and closings in a chronological record, making it possible to examine when movement occurs and how patterns develop. Comparing event records across routine periods or before and after an environmental or experimental change can show differences in room use, occupancy, or movement-related activity without relying on continuous visual monitoring.