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FAQ

What are the benefits of optoelectronic switches in level measurement?

  • Recording of the level with the cone tip is independent to a large extent of the physical characteristics of the liquids such as density, dielectric constant, conductivity, colour and refractive index
  • Detection of interface layers with rounded tip
  • The extremely compact design guarantees minimum space requirements and measurement in very small volumes
  • Temperature ranges from -269 … +400 °C
    Designs for pressure ranges from vacuum up to 500 bar

How does a built-in magnetic system work?

A float with a built-in magnetic system moves with the level of the medium to be measured on a guide tube which has one or more reed switch contacts built into it. The magnet actuates the contacts at the pre-set switching heights and thus allows individual levels to be monitored. The simple and tried-and-trusted principle of operation is suitable for a very wide range of applications.

How does a level sensor work?

These level sensors work on the float principle with magnetic transmission. The float's magnetic system actuates a resistance measuring chain that corresponds to a 3-wire potentiometer circuit in the guide tube.

What is a magnetostrictive level sensor used for?

These level sensors are used as measured value pick-ups for the continuous recording of levels, and are based on determining the position of a magnetic float according to the magnetostrictive principle.

What is a bypass level indicator?

In a communicating bypass chamber mounted to the side of a vessel a float moves with the level of the medium to be measured. The magnetic field of the radial-symmetric positioned in the float at submersion height activates the magnetic roller display attached to the outside of the bypass chamber as well as the switching and measuring elements.

What are the benefits of level sensors?

  • The reliable and proven operation principle is suitable for a very wide range of applications
  • Continuous measurement of levels, independent of physical and chemical changes of the liquid such as foaming, conductivity, dielectric constant, pressure, vacuum, temperature, vapours, condensation, bubble formation, boiling effects, change
  • Signal transmission over long distances
  • Simple installation and commissioning, onetime calibration only, no recalibration necessary
  • Interface measurement and overall level from Δ ≥ 50 kg/m³
  • Explosion versions
  • Output signal 4 ... 20 mA, HART®, PROFIBUS® PA, FOUNDATION™ Fieldbus
  • Resolution ≥ 5 mm
  • Level displayed proportional to volume or height
  • In combination with limit switches, stepless setting of the limit values possible over the entire measuring range
  • High repeat accuracy of the set limit values
  • Cable and plug versions

What are the benefits of high-precision level measurement?

  • The simple and effective principle of operation is suitable for a very wide range of applications.
  • Continuous measurement of levels, independent of physical and chemical changes of the liquid such as foaming, conductivity, dielectric constant, pressure, vacuum, temperature, vapours, condensation, bubble formation, boiling effects, change„
  • Signal transmission over long distances
  • Simple installation and commissioning, onetime calibration only, no recalibration necessary
  • Interface measurement and overall level from Δ ≥ 50 kg/m³
  • Explosion versions
  • Functional safety IEC 61508/IEC 61511, SIL-2
  • Output signal: 4 … 20 mA, HART®
  • Measuring accuracy ≤ 1 mm

In which areas can transparent sight glass level indicators be used?

They are the most suitable gauges for steam application above 35 bar, where mica shields have to be used to protect the sight glasses from corrosion by the steam boiler water. They can also be utilised in a great number of other applications,in particular for observing interface layers or liquid colour. A backlight illuminator can be fitted to the rear to improve visibility.


How does a reflex sight glass level indicator work?

The principle of the reflex level indicator is based on the reflection of light. In the gas or steam phase, the light is reflected by the prismatic grooves of the sight glass so that bright indication is achieved. In the liquid phase, the light is absorbed, resulting in a dark indication of the level.

What are the benefits of sight glasses in level measurement?

  • Detection of liquid level with glass level gauges is almost independent from physical properties like refraction index, density, conductivity, colour
  • Direct visualisation of the medium
  • No power supply required
  • Specified in accordance with several standards and customer standards
  • Simple and well-known technology
  • Robust design
  • Extremely low certification efforts