Level Measurement · Glossary

What is Point Level Measurement?

switch at one levelLevel Measurement

Point level measurement detects whether liquid or solid is present at one fixed height, giving an on or off signal.

Point Level Measurement Explained

Point level switches give high, low and overfill alarms, pump control and dry run protection. Continuous measurement instead gives the level at every height.

Common point sensors are floats, vibrating forks, conductive probes, capacitance switches and optical sensors.

Calculators for Point Level Measurement

CalculatorSump Pump Cycle Time CalculatorFree online calculator with formula and worked example.CalculatorVessel Holdup Time CalculatorFree online calculator with formula and worked example.

Free Downloads

Free downloadLevel Switch Testing ProcedureFree step by step procedure, Word and PDF.

Frequently Asked Questions

What is Point Level Measurement?

Point level measurement detects whether liquid or solid is present at one fixed height, giving an on or off signal.

Can a transmitter replace level switches?

For alarms, yes, through set points in the control system, but safety functions often need an independent switch.

Which point sensor is most reliable?

It depends on the product; vibrating forks are common because they have no moving parts.

Learn more on the blog

Types of level transmitters

A practical guide on instrumentationblog.in with more detail on point level measurement and how it is applied on real plants.

Read Full Article

More Level Measurement Terms

Level termHydrostatic Level MeasurementHydrostatic level measurement finds liquid level from the pressure at the bottom of a tank and the liquid…Level termDP Level MeasurementDP level measurement uses a differential pressure transmitter between a bottom tap and a top tap to…Level termWet LegA wet leg is a low side impulse line kept full of liquid, used for DP level where vapour would condense…Level termDry LegA dry leg is a low side impulse line that stays full of gas, used for DP level when the vapour does not…Level termBubbler Level MeasurementBubbler level measurement pushes a small gas flow out of a dip tube; the back pressure equals the liquid…Level termInterface LevelInterface level is the height of the boundary between two liquids of different densities in a vessel,…

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