Gauges strain-gauge pressure transducers

Strain-gauge pressure transducers are manufactured in many forms for measuring gauge, absolute, and differential pressures and vacuum. Full-scale ranges from 25.4 mm of water to 10,134 MPa are available. Strain gauges bonded direc tly to a diaphragm pressure-sensitive element usually have an extremely fast response time and are suitable for high-frequency dynamic-pressure measurements. 

Strain-gauge pressure transducers, 20 655 Strain gauges, 20 654-655 Strain hardening, of stainless steel alloys, 73 511... 

Liquid propane spills into 341 K water. Explosive vaporization always occurred and the delay between the start of the spill and the event was typically 0.2 sec. Strain-gauge pressure transducers were located 7.6 cm under the water interface and also in the air, 1.38 m from the spill container. The overpressure data are shown in Table I. The highest overpressure measured in the water was 410 kPa (60 psi) and the highest... 

Fig. 6.15. Basis of strain gauge pressure transducer (a) thin-film strain-gauge used as pressure sensor (b) deformation of conductor under tensile stress...

EXPLAIN how a strain gauge pressure transducer produces an output signal including ... 

The strain gauge pressure transducer (Statham Instrument Co.) 7 having a range of 1.0 psia, is accurate to 1% of full scale and is temperature-compensated. 

S37.3 Specifications and Tests for Strain Gauge Pressure Transducers. 

Nitrogen adsorption isotherms at 77 K were determined using a Carlo-Erba Sorptomatic. Neopentane adsorption isotherms at ice melting temperature (ca. 273 K) were determined using a Cl Robal microbalcince with pressure measurement by means of a calibrated CEC strain gauge pressure transducer. 

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

Pressure (strain gauges, piezoelectric transducers. Bourbon gauges)... 

Besides the strain gauge type transducer, other pressure transducers may employ variable capacitance, variable inductance, or piezoelectric crystal sensors to detect pressure changes. The low level output pressure transducer can be used in systems controlling flammable and other hazardous gases if the system has been designed such that the electronic power levels being used to excite the transducer remain very low. They can even be used in Class I, Division II areas if the proper intrinsic safety barriers are used in conjunction. Like the pressure gauge, the transducer may have a... 

The experimental activity was carried out on a cylindrical pressure vessel whose capacity is 50 litres and made from steel 3 mm thick. Fig. 2 shows the layout of the pressure vessel considered. The pressure vessel was connected to an oil hydraulics apparatus providing a cyclical pressure change of arbitrary amplitude and frequency (fig.3). Furthermore the vessel was equipped with a pressure transducer and some rosetta strain gauges to measure the stresses on the shell and heads. A layout of the rosetta strain gauges locations is shown in fig.4. 

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... 

Pressure. Pressure so defined is sometimes called absolute pressure. The differential pressure is the difference between two absolute pressures. The most common types of pressure-measuring sensors are silicon pressure sensors, mechanical strain gauges, and electromechanical transducers. 

Small pressure transducers with flush-mounted diaphragms are commercially available for the measurement of either steady or fluctuating pressures up to 100 MPa (about 15,000 Ibftin ). The metallic diaphragms are as small as 4.8 mm (%6 in) in diameter. The transducer is mounted on the apparatus containing the fluid whose pressure is to be measured so that the diaphragm is flush with the inner surface of the apparatus. Deflection of the diaphragm is measured by unbonded strain gauges and recorded electrically. 

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