Model LF-1

Submersible pressure sensor

For superior applications

Selected documents
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  • Level measurement in vessel and storage systems
  • Overfilling and no-load operation monitoring
  • Level measurement in rivers and lakes
  • Deep well and groundwater monitoring
  • Battery-operated level measuring systems

Special features

  • Suitable for measurements in contaminated and aggressive media
  • An optimised discharge behaviour and a large pressure port prevent the instrument from clogging and ensure a
    minimum maintenance effort
  • Can be used in explosion-protected areas
  • Developed for wireless applications


Permanently reliable
Extensive test cycles not only guarantee a permanent resistance and long service life in all commonly used oils and fuels, including aggressive crude oils and biofuels, but also in flowing and stagnant waters and in wastewater treatment applications.

Thanks to newly developed special cables, components made of high-alloyed stainless steel and an optional overvoltage protection against lightning, the submersible pressure sensor is perfectly suited for the measurement of liquid levels, also in the outdoor area.

Precise level and temperature measurement with HART® communication
A measurement uncertainty of max. 0.5 %, a long-term drift of 0.1 % and slight temperature errors make the LF-1 a reliable measurement solution for the monitoring of storage tanks and bodies of water.

The additional analogue temperature output facilitates the compensation of a temperature-induced density error especially at temperatures of up to -40 ... +80 °C [-40 ... +176 °F]. The integrated HART® communication can be used for scaling the measuring range and for the parameterisation of unit, error signal, and others.

Optimised electronics for battery operation
The modern electronic system guarantees not only a high accuracy in the long term but also ensures a very long battery life thanks to low power supply, low current consumption, fast response time and low-power output signals.

Safety also in hazardous areas
The optional intrinsically safe electronic system is authorised according to the common international standards and allows a safe worldwide application in explosive gases and vapours.

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