Piezoresistive pressure transducer

Pressure drop across the tar filter trap is measured by means of Kulite HEM-375 Piezoresistive Pressure Transducers. The sensing element is dielectrically isolated "silicon-on-stlicon" and exhibits excellent stability and thermal characteristics. They can be operated between -50 C up to 260 C. Pressure readouts at the inlet and the outlet of the filter trap are displayed in two Druck DPI 280 Series Digital Process... 

Detailed test section is shown in Figure 6. The test section was provided with pressure taps (piezometric ring) at various points in the upstream section and downstream section, sometimes on the pipe fitting like bend, elbow, etc. The static pressure at the different points was measured by means of simple manometer or piezoresistive pressure transducers. The main idea of putting long upstream and... 

The size, cost, and accuracy requirements for successful sensors place a substantial burden on the processes used to manufacture them. Typically, today s sensors are manufactured by processes that are specific to one sensor or, at best, to a limited class of sensors. This process specificity has occurred because each type of sensor is usually made of unique materials in unique configurations that best convert the quantities to be measured into electrical signals. For example, pressure transducers may use piezoelectric or piezoresistive materials on thin diaphragms, whereas ion-selective electrodes use ion-conductive glasses or polymers around electrodes. Unfortunately, this situation implies large developmental costs. 

Lang S B 1974 Sourcebook of Pyroelectricity (New York Gordon and Breach) Moser D 1993 CMOS flow sensors PhD Dissertation ETH Zurich Bicking R E 1981 A piezoresistive integrated pressure transducer Inst. Mech. Eng. C 164/81 21-6... 

Pressure sensor selection guidelines can be found in Ref. 3. Pressure sensors have various transducers connected to them to convert the measurement into a usable signal. Strain gauges and piezoresistive and piezoelectric pressure transducers are commonly used to produce the measured values. 

Piezoresistive Sensors. The distinction between strain-gauge sensors and pie2oresistive (integrated-circuit) sensors is minor. Both function by measuring the strain on an elastic element as it is subjected to pressure. A pie2oresistive transducer is a variation of the strain gauge that uses bonded... 

A quite important parameter for the operation of washing machines is their load. There are several ways to measure the wash load, e.g the force required to rotate the drum/tub/pulsator could be measured and the required amount of water worked out accordingly, or the machine load could be measured by a remote pressure-sensing device with piezoresistive transducers and wireless communication... 

Electrical Methods Electrical methods for pressure measurement include strain gauges, piezoresistive transducers, and piezoelectric transducers. 

Figure 3.141 shows a piezoresistive transducer with a pressure range of 1,500 to 5,000 bar range and a millivolt output. It provides the internal calibration and 0.3% FS accuracy. 

The resistive-type sensors measure strain-related mechanical properties such as strain, force, acceleration, and pressure-utilizing piezoresistive properties of sensitive film resistors [2,14,38,39]. These sensors are also incorporated as biosensors for detecting biomolecules. The electrode configuration is the same as in electrochemical transducers, but it measures the change of resistance when biomolecules interact with the biologically sensitive elements [2]. The piezoresistive microcantilever sensors are also extensively studied for biosensing. The piezoresistive sensors. 

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