Analog Sensor Scaling Calculator

Convert raw mA or Voltage signals into real-world Engineering Units (EU) for PLCs.

Signal Type

Live Input Signal (Raw)

Signal Minimum (e.g., 4mA)

Signal Maximum (e.g., 20mA)

Transmitter Calibration Range

Engineering Unit Min (EU Min)

Engineering Unit Max (EU Max)

Scaled Value

0.00 EU

Engineering Units (PSI, °F, GPM, etc.)

Linear Interpolation for PLCs

In industrial automation, field instruments (like pressure transmitters or flow meters) send a standard raw analog signal (usually 4-20mA) to the Programmable Logic Controller (PLC). The PLC programmer must scale this raw electrical signal back into physical Engineering Units (EU).

Scaling Equation: $$ EU = \left( \frac{\text{Input} - \text{Sig}_{min}}{\text{Sig}_{max} - \text{Sig}_{min}} \right) \times (\text{EU}_{max} - \text{EU}_{min}) + \text{EU}_{min} $$