Abstract
In the present chapter, we focus on measurement and sensor systems which are adapted for detecting physical quantities. In particular, this chapter is devoted to resistive sensors and measurement systems incorporating these kinds of sensors. Herein, several methods of measurements are feasible as a variety of detectable quantities may act on the resistance of a resistor-based sensor. In this respect, mechanical quantities may be detected via a geometrical change of a resistor, which in this case is denoted as a resistance strain gauge (RSG); see Sect. 3.1. Further, the measurable value of a resistive sensor element is temperature dependent in different ways. This fact offers a variety of designs for contact-based temperature sensors in Sect. 3.2. Indirect measurements of physical quantities such as airflow, via a temperature sensor, are exemplified in Sect. 3.3. It is noted, albeit not explicitly presented in many instances, that resistive sensor systems are often based on the use of appropriately designed measurement bridges.
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