Excitation Technique: RTDs and Thermistors being passive elements need a current excitation source to make measurements. Highly stable and accurately matched current sources with low drift are ...

The old saying “if it ain’t broke, don’t fix it” cautions against tampering with something that performs reliably and regularly proves its worth. Arguably, this advice applies to the circuit design ...

Designing an analog circuit can be a frustrating experience, as noted by Nick Cornford in his Design Idea (DI), “ DIY RTD for a DMM.” With a fortnight’s struggle, I completed the design of 4 mA to ...

Figure 2 shows a simplified block diagram of the temperature sensor design. The design uses Semitec 103AP-2 thermistor, a Vishay Precision Group 500Ω ±0.1% precision resistor, Intersil’s ISL28634 ...

Due to this requirement, this type of RTD module needs to be configured by firmware for differently wired RTD sensors easily. Figure 5 shows the block diagram for different wire RTD sensors based on ...

Both the RTD itself and its accuracy must be considered when selecting the RTD sensor. The temperature range varies with element type, and theaccuracy denoted at calibration temperature (usually at ...

An earlier Design Idea described how to linearize the output of an RTD (resistance-temperature-detector) sensor and how to calculate the resistor values using a spreadsheet (Reference 1). That idea ...

RTD sensors are available using two-, three-, and four-wire configurations, which differ in their use of sense wires (Fig. 1a, 1b, and 1c, respectively).

Endress+Hauser’s iTHERM TrustSens hygienic RTD is heralded as the world’s first self-calibrating temperature sensor. Its self-calibration process functions in situ and provides the necessary ...

Transmitters vs. Direct Wiring When making temperature measurements, two ways have traditionally been employed to get process readings back to a monitoring and control system. One method is to utilize ...