An Aneroid Pressure Sensor for Constant-Level Balloons

Nadav Levanon Space Science and Engineering Center, University of Wisconsin, Madison 53706

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Juris Afanasjevs Space Science and Engineering Center, University of Wisconsin, Madison 53706

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Robert A. Oehlkers Space Science and Engineering Center, University of Wisconsin, Madison 53706

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Verner E. Suomi Space Science and Engineering Center, University of Wisconsin, Madison 53706

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Abstract

The pressure sensor for the Tropical Wind Energy conversion and Reference Level Experiment (TWERLE) is described. Key design features of the sensor are: capacitive coupling, reference at midrange, up-down counting, passive oven, storage at flight pressure and prelaunch calibration. Sensor specifications are given which are based on the production results of 440 units. Drift, as estimated from simulated life tests, is 1 mb per 6 months. The overall weight of the sensor, including thermal package, is 180 g.

Abstract

The pressure sensor for the Tropical Wind Energy conversion and Reference Level Experiment (TWERLE) is described. Key design features of the sensor are: capacitive coupling, reference at midrange, up-down counting, passive oven, storage at flight pressure and prelaunch calibration. Sensor specifications are given which are based on the production results of 440 units. Drift, as estimated from simulated life tests, is 1 mb per 6 months. The overall weight of the sensor, including thermal package, is 180 g.

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