Although several ranges are used, the most popular is still the 4- to 20-mA standard. Loop accuracy depends on the transmitter’s ability to transform the sensor signal to a current.

It’s based on pulse-width modulation to implement a cheap but accurate current-loop transmitter. A dual-channel isolator (E1-E2-Q1-Q2) provides galvanic isolation of the PWM input.

The transmitter's programmable gain amplifier range allows full-scale inputs from 5 to 320 millivolts. Its all-analog signal path contains a built-in subregulator, voltage reference, input multiplexer ...

Specific applications for true RMS current transmitters include monitoring VFD controlled loads and accurately measuring phase angle- or burst-fired, time-proportioned SCR controlled loads.

The Current Transmitters Market is poised for substantial growth between 2022 and 2028, driven by the increasing demand for efficient power management and the integration of automation and control ...

Similarly, current needs to be independent of temperature—that is, greater than 100 ppm/°C—because the transmitter and the sensor can be in harsh environments. The voltage-controlled current source ...