Experiment #5 Pressure Transducer - Inside Mines实验# 5压力传感器在矿山.docVIP

Experiment #5 Pressure Transducers / Gages: /eggn250/exp5.htm 3 ways to measure pressure: 1.) Bourdon Tube Pressure Gauge /web/ProductInformation/ProductInformation_Technical_BourdonTubeOperatingPrinciple.html Pointer Bourdon tube End piece Link Quadrant Movement Connection (or socket) Dial Bourdon tube pressure gauges are widely used in all branches of industry. The construction is simple yet rugged, and operation does not require any additional power source. The Bourdon tube element is directly exposed to the medium being measured and is normally made of copper alloy (brass) or stainless steel as the application demands. Except for absolute pressure gauges, WIKA Bourdon tube gauges measure pressure relative to the pressure of the surrounding air. The Bourdon tube measuring element is made of a thin-walled tube that is either bent into a semicircle (C-shape tube) or spirally wound (coiled safety tube). When pressure is applied to the measuring system through the Pressure port, the pressure causes the Bourdon tube to straighten itself, thus causing the End piece to move upward (or downward for vacuum measurements). The movement of the end piece is transmitted via the Link to the Movement. The movement converts the linear motion of the Bourdon tube end piece to a rotational movement which in turn causes the Pointer to indicate the measured pressure. Bourdon tube pressure gauges are designed for the measurement of pressure and vacuum and are generally suitable for all clean and non-clogging liquid and gaseous media. Various types of Bourdon tubes are used. C-shape Bourdon tubes are typically used for ranges up to 800 psi. Higher ranges use coiled Bourdon tubes for safety. All WIKA Bourdon tube pressure gauges are capable of withstanding pressures up to 30% above their full span without a shift in calibration. Bourdon tube pressure gauges are available to measure full vacuums, compound and pressure ranges from 0-10 psi to 0-60,000 psi with an accuracy from ±0