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JUMO MAERA S26 - Level Probe (402090)


  • Measuring ranges: 0 to 250 mbar – 0 to 2.5 bar (0 to 2.50 mWS – 0 to 25 mWS)
  • Medium temperature 0 to 50 °C
  • Piezoresistive silicon sensor
  • Excellent long-term stability
  • High overload resistance
  • Robust level probe for internal installation

Customer benefits

Process reliable and versatile
Its core is a piezoresistive measuring cell that is safe and reliable due to its high overload resistance and longevity. The entire probe body and the pressure measuring cell are made of stainless steel and thereby resistant to a large number of mediums. Maximum process safety and reliability can be guaranteed for almost every application due to the variety of available cable materials and process connections. 


Level and filling level measurement

  • In rainwater cisterns
  • In gray water recycling
  • In heating oil tank and diesel tank

Product comparison level probes


The JUMO MAERA S26 level probe can be used in tanks for hydrostatic filling level measurement.

When the level probe is immersed into a liquid then a liquid column emerges above the probe. The liquid column increases as the probe is immersed deeper into the liquid and creates a hydrostatic pressure on the measuring system by the force of its weight.
The stainless steel membrane of the level probe absorbs this pressure and passes it on to the sensor through a filling oil. The pressure sensor of the level probe is based on the proven piezoresistive measurement technology (silicon semi-conductor DMS).
The measured values for pressure are transformed into electronic output signals by an electronic system integrated in the probe. With the liquid density known, each signal value is a direct measurement for the filling height. Filling heights can be measured from 2.50 m to 25 mWS (water column).

The hydrostatic paradoxes, which state that the hydrostatic pressure is independent of the shape of the tank, influence the result of the measurement. Establishment and visualization of levels in containers that are not cylindrical is then possible by means of an integrated mathematic function or with a customer-specific linearization in conforming controllers, paperless recorders, and indicators.

Further interesting information can be found in the brochure "Level Probes - Hydrostatic Level and Filling Level Measurement".

Further technical information is available in the Download area.


Accessory articles

Article number Product description Price / piece
Terminal box with pressure compensation price on request

(in stock)

Cable holder price on request

(in stock)

Sealing screw price on request
Pressure equalization filter for cable price on request

(in stock)

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