ABSTRACT
The telemetering system's function is to make one or more measurements for transmission. The electronics industry has produced many different sensors for the practitioner to use in measurement applications. Quite often, the manufacturers' data sheets and catalogs are the best source for applications information that explains how to use a given sensor to produce meaningful and repeatable results. This chapter examines the characteristics of several representative sensors to see how the process works and the types of outputs generated. It illustrates an overall arrangement for a measurement instrument showing the sensor, signal processing electronics, and supplemental electronics to make the instrument workable in the overall measurement system. The sensor converts the input signal into a voltage that the Analog-to-Digital Converter (ADC) measures. The ADC bits are the instrument's output signal. The support electronics control the output interface and regulate the power supplied to the components. These signals enter or exit the device through the Input/Output (I/O) port.
