Automation Technology

Pressure Instruments

Automation Technology are able to supply a variety of pressure devices to suit commercial and industrial applications, including pumps, machinery and related systems; steam boilers or other pressurized vessels; compressors; chemical processing; oil, gas and petrochemical systems; oil and gas pipeline monitoring; power plant equipment; and pulp and paper mills.
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Pressure instruments use many different sensing technologies. Mechanical deflection devices such as diaphragms, Bourdon tubes or bellows consist of an elastic or flexible element that is deflected mechanically by a change in pressure. Sealed pistons or cylinders are also available. Strain gauges are bonded to a larger structure that deforms as pressure changes. Piezoresistive devices sense shifts of electrical charges within a resistor. Piezoelectric pressure instruments measure dynamic and quasi-static pressures.
Their common modes of operation are charge mode, which generates a high-impedance charge output; and voltage mode, which uses an amplifier to convert the high-impedance charge into a low-impedance output voltage. Thin film devices consist of an extremely thin layer of material, usually titanium nitride or polysilicon, deposited on a substrate. Pressure instruments that use microelectromechanical systems (MEMS), variable capacitance, and vibrating elements are commonly available.
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