A new temperature sensor has been designed and tested, in which a change in ambient temperature changes its flow resistance. It may be constructed to give either a positive or negative change of resistance for an increase of temperature and may be capable of fluid shut-off. This paper gives the operating characteristics for three different configurations operating with air, which illustrate the high-pressure gain possible with this type of temperature sensor. Such a device may operate directly in the process pneumatic control pressure range without amplification.
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References
1.
DahlA. I.‘Temperature, its measurement and control in science and industry’, in Applied methods and instruments, Vol. 3, Part 2, 1962 (Reinhold, New York).
2.
BennedictR. P.‘The calibration of thermocouples by freezing-point’, J. Engng Pwr, Trans. Am. Soc. mech. Engrs, 195981, 223–9.
3.
BakerH. D.Temperature measurement in engineering, Vol. II, 1961 (Wiley, New York).
MorsiS. A.‘Passively and actively controlled externally pressurised oil film bearing’, J. Lubric. Technol., Trans. Am. Soc. mech. Engrs, 197294, 56–63.
6.
MohsinM. E.MorsiS. A.‘The dynamic stiffness of controlled hydrostatic bearings’, J. Lubric. Technol., Trans. Am. Soc. mech. Engrs, 196991, 597–608.
7.
QualeE. B.WillshireF. R.‘The performance of hydrodynamic lubricating films with viscosity variation perpendicular to the direction of motion’, J. Lubric. Technol., Trans. Am. Soc. mech. Engrs, 197294, 76–81.
