Use of 4-to-20-mA current loops involves more than just a simple series connection between sensor, display, and power supply. The point where a sensor takes a measurement is, at times, many yards away ...

Using an analog temperature sensor, an op amp, a transistor, and a low-dropout linear regulator, this circuit provides a 4-to-20-mA output over a 3.75- to 28-V compliance range (see the figure).

The I/O capabilities built into most microcontrollers make it easy to measure the analog world. Say you want to build a data logger for temperature. All you need to do is get some kind of sensor that ...

The low output voltage level of the analog sensor and the long distance to the control room together constitute significant system design challenges. Here are clues on how to solve them. The 4-20 mA ...

I recently published a simple design for a platinum resistance detector (PRTD) 4 to 20mA transmitter circuit, illustrated in Figure 1. Unfortunately, implementing such quadratic floating-point ...

The MAX12900 is for automation and process control, loop-powered 4-20mA current transmitters, remote instrumentation and smart sensors. The device increases system accuracy with 10 ppm/°C voltage ...

Manipulate the ADC Series analog to digital converter with your mouse to see the finger-safe field wiring terminals, clearly marked for field installation wiring. The converters mount easily to a DIN ...