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Murphy oil pressure gauges with switches that activate on low pressure. A pressure switch is a form of switch that operates an electrical contact when a certain set fluid pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall.
A new HP notebook similar in appearance to the Mini-Note, called the HP Mini 1000 Vivienne Tam Edition, was unveiled in October 2008, with a launch expected for December that year. [18] The small pink computer is a collaboration with fashion designer Vivienne Tam , and has a 10-inch screen, a 1.6 GHz Intel Atom processor, 1 GB of RAM, and an 80 ...
The HP 110 (aka HP Portable and HP 45710A) is an MS-DOS-compatible laptop released in 1984 by Hewlett-Packard. It runs off batteries and uses a Harris 80C86 running at 5.33 MHz with 272 KB of RAM. It has an 80 character by 16 line monochrome ( 480 × 128 pixel ) liquid crystal display , runs MS-DOS 2.11 in ROM , and has the application programs ...
Pneumatically actuated shut down valve A diagram of the internal components of a safety shutoff valve. When this type of valve is tripped, the flow is quickly stopped and an indicator disc tells the operator that the electrical circuit has been opened by a failure somewhere in the system.
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In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]
A sail switch, vane switch or flow switch is a mechanical switch that is actuated on or off in response to the flow or non-flow of a fluid such as air or water. [1] A sail switch typically operates through the use of a paddle or a diaphragm which gets displaced due to the force of fluid or air moving past it.