Sensor Range/Accuracy Converter (4-20mA to Engineering Units)

Sensor Range / Accuracy Converter

4-20mA ↔ engineering units · % of range · error band

Signal & Range

Enable only for differential-pressure flow, where the signal is proportional to the square of flow rate.

Convert

Accuracy (optional)

Result

Enter your signal type, range and value to convert between signal and engineering units, see the % of range on a live scale bar and the ± error band from your sensor accuracy spec

Standard scaling is linear between the lower and upper range values, so a signal at mid-scale maps to the mid-point of the range — except with square-root extraction, where a differential-pressure flow signal at 50% represents about 71% of flow, because the DP signal follows the square of flow. Accuracy specifications differ: percent of span gives a constant error band across the range, while percent of reading gives a band that shrinks toward zero, so a transmitter can look very accurate near full-scale and much less so near the bottom. Always confirm the transmitter's configured range and accuracy basis against its datasheet and calibration record — this tool assumes an ideal, correctly calibrated linear device.

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