Selection
Point level vs continuous level: choose the control task first
A point level switch reports pre…
Read guideLISEN · BAUMER
Knowledge center
Practical engineering guides on selection, installation, process behavior and replacement decisions.
Technical articles and source documents are available in English. The main website pages are available in 20 languages.
64 technical guides
Selection
How frequency sweep point level detection works
Frequency sweep evaluates the el…
Read guideSelection
A complete level sensor selection checklist
Begin with the process and contr…
Read guideTechnology comparisons
Replacing a float switch with an electronic level switch
An electronic point switch can b…
Read guideTechnology comparisons
Vibrating fork vs electronic point switch
Both technologies can detect a l…
Read guideTechnology comparisons
Capacitive vs conductive level switches: what changes?
Conductive sensing depends on an…
Read guideTechnology comparisons
Radar vs point level switch: replacement or complement?
A radar transmitter and a point …
Read guideTechnology comparisons
Ultrasonic level sensing vs a local point switch
Ultrasonic sensing measures dist…
Read guideTechnology comparisons
Hydrostatic level vs point detection in tanks
Hydrostatic measurement derives …
Read guideTechnology comparisons
Optical vs electronic point level switches
An optical switch detects a chan…
Read guideTechnology comparisons
Guided wave radar and point switches in the same design
Guided wave radar generally meas…
Read guideTechnology comparisons
Rotary paddle vs electronic point detection for solids
A rotary paddle detects resistan…
Read guideMedia behavior
Detecting foam or ignoring foam: define the objective
“Works with foam” is incomplete.…
Read guideMedia behavior
Level switches for sticky products and coating
For sticky media, the critical e…
Read guideMedia behavior
Low-dielectric media: why a water test is not enough
A sensor that switches clearly i…
Read guideMedia behavior
Oil/water differentiation: what a point switch can tell you
A configurable point sensor may …
Read guideMedia behavior
Point detection in powders and granules
Powder and granule applications …
Read guideMedia behavior
Selecting a level switch for slurry
Slurry selection must consider b…
Read guideMedia behavior
How temperature and viscosity affect point detection
Temperature can change both the …
Read guideMedia behavior
Conductivity and dielectric constant in level sensing
Conductivity and dielectric cons…
Read guideInstallation
Hygienic mounting: the sensor is only part of the assembly
A hygienic sensor requires a com…
Read guideInstallation
G½, BSPP and NPT: why the thread name matters
G½ parallel thread and ½ NPT tap…
Read guideInstallation
Nozzle length and sensing-tip position
A point switch must sense the pr…
Read guideInstallation
Horizontal and vertical point-switch mounting
A model that permits different o…
Read guideInstallation
Seals and gaskets in a level sensor package
The seal is part of the process …
Read guideInstallation
Why maximum temperature and pressure cannot be combined
A datasheet may list several max…
Read guideInstallation
PEEK, 316L and titanium: evaluate the actual wetted parts
Wetted-material selection requir…
Read guideInstallation
M12 connectors, IP67 and washdown service
The installed protection depends…
Read guideElectrical integration
PNP vs NPN: match the sensor to the PLC input
PNP and NPN describe different t…
Read guideElectrical integration
NO and NC do not define the entire fail-safe strategy
Normally open and normally close…
Read guideElectrical integration
20 mA switching load is not a 4–20 mA level signal
A maximum switching current of 2…
Read guideElectrical integration
Power-up time and startup logic for level switches
A sensor may need time after ene…
Read guideElectrical integration
Damping and debounce: control nuisance switching carefully
Time filtering can suppress brie…
Read guideElectrical integration
Using a point switch for pump dry-running detection
A point switch can indicate loca…
Read guideElectrical integration
High-level alarms and overfill: define the system function
A high-level switch provides a s…
Read guideElectrical integration
Hazardous-area sensor selection: verify the exact configuration
Hazardous-area suitability is sp…
Read guideApplications
Level switches for dairy and food processing
Food-processing selection combin…
Read guideApplications
Brewery applications: liquid presence, foam and cleaning
Brewery duties need a clear dist…
Read guideApplications
Level switch selection for pharmaceutical processes
Pharmaceutical applications need…
Read guideApplications
Level switches for chemicals and detergents
Chemical and detergent duties re…
Read guideApplications
Water-treatment level switches: more than clean water
Water-treatment applications can…
Read guideApplications
Point level detection in oils and lubricants
Oils and lubricants can have a s…
Read guideApplications
Specify a complete level sensor package for an OEM skid
An OEM package should define the…
Read guideApplications
Point switches for plastic granule hoppers
Granule hoppers need level detec…
Read guideTesting & maintenance
How to design a useful level switch sample test
A useful sample test defines the…
Read guideTesting & maintenance
Troubleshooting a switch that remains covered after draining
A persistent covered signal can …
Read guideTesting & maintenance
Troubleshooting a switch that does not detect product
Failure to indicate coverage can…
Read guideTesting & maintenance
Commissioning checklist for a point level switch
Commissioning should verify the …
Read guideTesting & maintenance
Maintaining electronic point level switches
No moving float does not mean no…
Read guideTesting & maintenance
CIP and SIP: specify the complete cleaning envelope
Cleaning and sterilization can i…
Read guideTesting & maintenance
How to review a sensor certificate without overclaiming
A certificate is useful only whe…
Read guideTesting & maintenance
Legacy LBFS, LBFS-2 and LBFI: keep the data separate
Similar Baumer family names do n…
Read guideProcurement
Lisen or Baumer: compare the required configuration
Compare Lisen and Baumer against…
Read guideProcurement
Compare total installed cost, not only sensor price
Total cost includes the sensor, …
Read guideProcurement
A spare sensor must match more than thread and voltage
A compatible spare must satisfy …
Read guideProcurement
What to include in a level sensor RFQ
A strong RFQ describes the requi…
Read guideSelection
LBFS, LBFS-2, PL20 and LFFS: a practical CleverLevel family map
CleverLevel is a portfolio, not …
Read guideCommissioning
Window trigger vs adaptive trigger: write a testable requirement
Choose trigger behavior accordin…
Read guideElectrical
Why a point sensor with 4–20 mA is not a tank level transmitter
An analog electrical signal does…
Read guideElectrical
IO-Link level switches: the commissioning record your PLC team needs
An IO-Link interface makes devic…
Read guideProcurement
Comparing Lisen and Baumer: build a like-for-like quotation
Compare the complete configured …
Read guideCommissioning
A sample test matrix for foam, coating and recipe changes
A useful sensor trial tests tran…
Read guideInstallation
High-temperature sensor selection: separate product, cleaning and ambient limits
High-temperature selection needs…
Read guideProcurement
Retrofit an existing level switch: a five-gate review
A replacement should pass mechan…
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