A simple method for measuring gas production by microorganisms by using a pressure transducer to sense pressure buildup was developed and tested with members of the coliform group. The test system consisted of a 5.0 lb/in(2) pressure transducer and a pressure equalizer valve attached to the metal cap of a test tube (20 by 150 mm); gas pressure was recorded on a strip-chart recorder. Gas pressur...

IntroductionLateral retinacular release, tibial tuberosity elevation, and tibial tuberosity elevation with medial transposition are commonly done at our institution in patients who have failed conservative therapy for patellofemoral pain syndrome. Our clinical results reflect the findings of multiple authors and are not always satisfactory. Usually, the retropatellar surface is referenced in bi...

IV. Pressure Drop Definition In our experiments we measure the total pressure drop across the axisymmetric abrupt contraction-expansion geometry. We then systematically correct this to report an ‘extra pressure drop’ associated with the contraction-expansion alone. Table 1 shows the axial distance of each possible pressure transducer location from the contraction plane. For clarity, it is usefu...

INTRODUCTION High precision pressure sensors based on resonating techniques have been manufactured for many years but use large transducer components and often have unwieldy media isolation techniques. This paper presents a MEMS Resonant Pressure Transducer (RPT) that is produced using a flexible fabrication route to allow pressure ranges from 1bar to 700bar in fully oil isolated hermetic packa...

In this paper, we will r1rst introduce the methods and instrument or the indicated diagram of microcomputer testing compressor, and then we will emphasize the building of mathematical models of pressure-inducting system of the pressure transducer. Based on the analysis of frequency response, we will discuss how to reduce the distrubance. We hope our exploration may be helprul to those who are r...

Over the past 30 years, the PDCR-81 pore pressure transducer has become a standard instrument for measuring pore pressures in centrifuge experiments. Following the retirement of this transducer and its reduced reliability, it has become vital to find an alternative sensor for use by the geotechnical modelling community. In this paper, the response of the 2Mie pressure transducer is compared aga...

It has been found that some shapes of lead zirconate titanate (PZT) ceramics respond to rapid temperature fluctuations when mounted in a particular geometrical configuration. This effect is presumably caused by thermal stresses in the crystal which produce a voltage difference across the silvered surfaces. These units were originally constructed to serve as pressure transducers in a lowpressure...

Semiconductor pressure transducers offer an economical means of achieving high reliability and performance in pressure sensing applications. The completely integrated MPX5100 (0–15 PSI) series pressure transducer provides a temperature–compensated and calibrated, high–level linear output that is suitable for interfacing directly with many linear control systems. The circuit described herein ill...