Linear Scaling
Convert between 4–20 mA, percent, and engineering units using a transmitter's lower and upper range values.
Instrumentation Utility for iPhone
Signal Scaler
Fast, practical 4–20 mA scaling and differential-pressure flow calculations for instrumentation technicians — designed to work offline in the field.
4–20 mA
Linear scaling
0–100%
Percent conversion
√DP
Square-root flow
DP → Flow
Quickly work with differential-pressure and square-root flow relationships without reaching for a separate calculator.
Built for the Field
A straightforward utility focused on the calculations instrumentation technicians use in real field work.
Private by Design
No accounts, ads, analytics, or tracking. Calculations are performed locally and the app works offline.