Click save settings to reload page with unique web page address for bookmarking and sharing the current tool settings

Invert the low & high range limits for the measurement input settings

Flip tool with current settings to swap measurement input (I) with sqrt 4-20mA output parameters

**DP flow transmitter products**

- DP transmitter with for measuring 300inH2O gas flow across orifice plate
- 10 kPa orifice plate differential pressure transmitter for water flow measurement
- Pitot tube air flow calculation 1000 hPa differential pressure transmitter
- 250″wc Orifice plate flow measurement dp transmitter

## Related Tools

Find another flow measurement calculator by clicking on the required answer which coincides with the input parameters you already know.

vol flow | mass flow | flow speed | vol | mass | time | |
---|---|---|---|---|---|---|

area |
flow speed | vol flow | ||||

dia |
flow speed | vol flow | ||||

w x h |
flow speed | vol flow | ||||

time |
vol | mass | vol flow | mass flow | ||

vol |
time | density | vol flow | |||

mass |
time | density | mass flow | |||

density |
mass flow | vol flow | mass | vol | ||

flow speed |
area, dia |

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## User Guide

This differential pressure flow transmitter square root extraction 4 to 20 milliamp current output calculator provides a way to determine the flow output reading from the pressure drop measured across an orifice plate and the differential pressure transmitter range. A conversion scale graphic for each differential pressure and SqRt 4-20mA flow output range combination entered is also displayed below the calculated values.

### Formula

This dp flow transmitter output calculator uses the following formula to calculate the output over a SqRt 4-20mA range:

Linear mA out = 4 + (16 x ((Rdg – Low Limit) / (High Limit – Low Limit)))

### Parameters

#### Unit

Enter the unit used for measuring differential pressure, e.g. mbar, psi, kPa, inH2O etc…

#### Reading

This is the differential pressure measured by the dp flow transmitter that you wish to convert to a square root extraction 4 to 20 milliamp current output reading.

#### Low Limit

Enter the lowest pressure that the dp flow transmitter will measure. For example zero would be a typical value for most dp flow transmitters, but you can also add negative (-) or positive (+) values as well. Please enter the value in the same pressure units as specified for all other input values.

#### High Limit

Enter the maximum differential pressure that the dp flow transmitter will measure.

#### SqRt Output (mA)

This is the expected ideal dp flow transmitter current output signal in milliamps for theĀ pressure drop specified.

**DP flow transmitter products**

- Pitot tube air flow calculation 1000 hPa differential pressure transmitter
- 10 kPa orifice plate differential pressure transmitter for water flow measurement
- DP transmitter with for measuring 300inH2O gas flow across orifice plate
- 250″wc Orifice plate flow measurement dp transmitter