![]() ![]() Height gauges are used in machining operations for inspecting finished parts. Key specifications include height gauge type, measurement range, and resolution. A height gauge generally consists of a rigid column mounted to flat base with a measuring head that displays height from the bottom of the base on a dial, vernier, or digital display. Height gauges are electro-mechanical or mechanical metrology instruments that measure the dimension of machined parts from a datum reference-a surface plate, for example. Other depth gauges are used for measuring the tread depths of tires. Depth gauges vary in their readouts from simple direct reading tic marks to digitally displayed numerals, with corresponding accuracy. Key specifications include depth gauge type, measurement range, graduation, dial reading, along with a host of possible features. Direct reading rules and digital readouts are available as well. A depth gauge generally consists of an anvil, an indicating dial, and a probe assembly. Depthĭepth gauges are electro-mechanical or mechanical metrology instruments that measure the inside lengths of holes and other machined cavities. Bore gauges are often supplied with multiple adapters to cover the measuring range. Key specifications include bore gauge type, measurement range, maximum measuring depth, graduation, as well as a host of possible features. They are available with analog or digital displays. Boreīore gauges are electro-mechanical or mechanical metrology instruments that measure the internal diameters of machined holes. Level gauges are often fitted with shut-off and drain valves for maintenance. Key specifications include pressure rating and media type, along with considerations for body material and features. Other methods of detecting the liquid level exist as well. A level gauge commonly uses a transparent sight tube mounted to the tank sidewall which parallels the height of the fluid contained within the tank. Level gauges are visual instruments used to determine the presence and height of liquid in tanks such as boilers. They can be fitted with outputs for remote interrogation of permanent units or can also be used for portable pressure measuring. Digital pressure gauges need power to operate which can be by battery or from an external source. Key specifications include maximum/minimum measurable pressure, signal output, connection location, connection size, and accuracy. Pressure sensing can be electronic or mechanical. A digital pressure gauge displays pressure reading numerically usually with an LCD readout. Digital Pressureĭigital Pressure Gauges are electro-mechanical instruments which measure the force that a contained liquid or gas exerts on a unit area. Manometers and vacuum gauges are also covered under pressure gauges. Most cannot be interrogated by a process controller. They can operate without electrical power and provide immediate and continuous readings. ![]() Analog pressure gauges provide inexpensive measuring of pressure directly in pipelines and gas vessels. Key specifications include maximum/minimum measurable pressure, dial size, connection location, connection size, and accuracy grade. In rarer cases-an auto dashboard is one-the dial may display the analog signal of the pressure measured through a pressure transducer. ![]() An analog gauge often relies on a coiled tube attached to a pointer to directly display pressure against a dial face. Analog PressureĪnalog Pressure Gauges are mechanical instruments which measure the force that a contained liquid or gas exerts on a unit area. Image credit: Funtay/Shutterstock Different Types of Gaugesīelow we list the different types of gauges used in industries. Other gauges are used in very specific measuring applications from spark plug gaps to screw threads. Level gauges measure the level of fluid in tanks and pressure vessels. Dimensional gauges are classified by what they measure, be it bore diameter, depth, or height, and are specific to machining processes. Gauges which measure pressure are classified as analog or digital depending on their readouts. They can be mechanical or electro-mechanical devices and offer displays ranging from direct-reading rules to digital LCDs. Mechanical gauges are instruments that measure pressure, dimensions, levels, etc.
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