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pH meter: pH (chemical acidity/basicity of a solution) photometer: illuminance or irradiance planometer: area polarimeter: rotation of polarized light potentiometer: voltage (term is also used to refer to a variable resistor) profilometer: surface roughness protractor: angle psychrometer: humidity pycnometer: fluid density pyranometer: solar ...
Portable, or field pH meters, are handheld pH meters that are used to take the pH of a sample in a field or production site. [19] In-line or in situ pH meters, also called pH analyzers, are used to measure pH continuously in a process, and can stand-alone, or be connected to a higher level information system for process control. [20]
Chain-link fencing; Metal railings; Palisade fencing; Rolled mesh fencing; Timber fencing; Welded wire mesh fence fencing; Vertical bar fencing has been the most popular form of perimeter security fence since the 1980s. Since the 2000s, welded wire mesh and acoustic barriers have also become popular types of perimeter fence around the world.
Woven and mesh wire fencing material has smooth horizontal wires and vertical wires (called stays). Wire spacing and height of fence is dependent on which type of animal is being contained. [9] Agricultural woven wire is identifiable by wire "knots" wrapped around each intersecting wire. Mesh wire material is spot welded at each junction.
A fence is a structure that encloses an area, typically outdoors, and is usually constructed from posts that are connected by boards, wire, rails or netting. [1] A fence differs from a wall in not having a solid foundation along its whole length. [2] Alternatives to fencing include a ditch (sometimes filled with water, forming a moat).
This is a list of building materials. Many types of building materials are used in the construction industry to create buildings and structures . These categories of materials and products are used by architects and construction project managers to specify the materials and methods used for building projects .
Several such coils with a few stakes to secure them in place are just as effective as an ordinary barbed wire fence, which must be built by driving stakes and running multiple wires between them. A platoon of soldiers can deploy a single concertina fence at a rate of about a kilometre (5 ⁄ 8 mile) per hour. Such an obstacle is not very ...