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DP range for tank level

Level and pressure

Calculate the range, explore the level and check the relationship between DP and 4–20 mA.

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Configure the application

Positive: transmitter below the 0% level. Negative: above. HP line filled with the process liquid.

%

Use a comma or decimal point. For negative values, tap +/−.

Transmitter range

Instant update
LRV · 0% · 4 mA

0kPa

URV · 100% · 20 mA

29.42kPa

Span

29.42kPa

Current DP14.71 kPa
Current12 mA
Current level50 %1.5 m

Within range · linear with level.

Installation diagramTank with the HP tap at the 0% level. In a closed tank, the LP tap is in the vapor space, above 100%. Educational diagram, not to scale.100% · URV50%0% · LRV50%Lower tap · HPAtmosphere12 mADPHPLPh = 1.5 mH = 3 mHP elevation offset: 0 m

Drag the level in the tank or use the slider below. In an open tank, LP references atmosphere. Educational diagram, not to scale.

Explore the level

Drag or use the arrow keys
0%25%50%75%100%
DP = HP − LP

Reference points

Calculated values for checking the range.

Level %Height mDP kPamA
0004
250.757.3558
501.514.7112
752.2522.06516
100329.4220

Calculated points, not measurements. This is not a calibration certificate.

DP RANGE REPORT

Differential pressure level measurement

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Application configuration

Open tank

H: 3 m · Process liquid density: 1000 kg/m³ · HP elevation offset: 0 m

LRV · 4 mA

0 kPa

URV · 20 mA

29.42 kPa

Span

29.42 kPa

Current level: 50% (1.5 m) · DP: 14.71 kPa · 12 mA

Within range · linear with level.

DP vs. signal

Linear 4–20 mA conversion curvekPa07.3514.7122.0629.4248121620mA

Reference points

Level (%)Height (m)DP (kPa)mA
0004
250.757.3558
501.514.7112
752.2522.06516
100329.4220

Constant density; HP line filled with the process liquid; DP = HP − LP; linear 4–20 mA output. LP vented to atmosphere. Calculated points, not measurements. This is not a calibration certificate.