Abstract

GARCIA IBARRA, Alejandro Rafael et al. Differential pressure transmitter with very high precision and stability. EAC [online]. 2014, vol.35, n.1, pp. 57-77. ISSN 1815-5928.

This work presents the fabrication of piezoresistive differential pressure transmitters with analog output two-wire 4-20 mA. The devices use a DSSP (Digital Signal Processor Sensor) to achieve temperature compensation at temperatures from 0°C to 80°C and differential pressure calibration range from 0 bard to 25 bard[1 bard = 10⁵ Pa differentials]and line pressure range from 0 to 7barg[1 bard = 10⁵ Pa above atmospheric pressure]. The transmittersmeasureseveral industrial variables: differential pressure, relative pressure and absolute pressure. The transmitters have a TEB (total error band) less than 0.15 percent of full scale output.

Keywords : piezoresistive differential pressure sensor; signal conditioning; differential pressure transmitter; precision; Total Error Band.

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