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Hydrocont D50

Hydrocont D50

Hydrostatic level measurement for extreme climatic conditions and moist environments Hydrocont® D50

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  • Hydrostatic filling level measurement, suitable also for Ex areas

  • with dry capacitive measurement system

  • with display, 4-20mA or 0-10V output and 2 pnp switching outputs

  • Particularly suitable for tanks with high condensation

  • Fill level measurement in tanks, flumes and tanks

  • Housing versions in stainless steel with plug or clamp connection

  • Hermetically sealed completely to the outside, no air filtration required

  • Areas with very aggressive atmosphere

  • Tube extension and cable version for mounting from the top

  • Measurement display on high brightness LED display

  • Good readability

  • Easy commissioning

  • No failures resp. drift problems caused by condensation

  • Very high accuracy and long term stability

Application description

The devices of the series Hydrocont® D50 with integrated digital evaluation electronic are compact sensors for measuring and monitoring of fill levels.

The excellent characteristics like highest strength against pressure and pressure blows, high resistance against chemicals and corrosion, very good insensitiveness against temperature shocks and EM interference, highest accuracy and long term stability and also low influence of temperature makes it possible to use the sensor in all pressureless containers for liquid medium like water, waste water, solvents, oil, sludge, grease, cleaning agents, etc.

Because of the special construction of the device Hydrocont® D50, this sensor is especially suitable for the use in areas with high air humidity and condensed water formation, where conventional devices can not be used or can only be used by applying an expensive leaded pressure compensation capillary.

Function description

The level measurement system Hydrocont® D50 is built in the wall of the medium container.


The medium contacts directly the ceramic membrane of the sensor without using a pressure mediator liquid and causes there a deflection of the membrane because of the hydrostatic pressure of the medium.

At the maximum deflection the membrane contacts a robust ceramic carrier and because of this, the membrane come through over pressure of up to 80-times of nominal load without damage.

The fill level proportional pressure signal of the ceramic membrane is recorded from a processor with high resolution, adjusted according to the settings and converted into a high resolution output signal of 4...20mA or 0...10V. Due to the integrated linearization function with up to 25 linearization points it is possible to realize a linearization of the measuring signal, e.g. for the volume calculation in conical or laying cylindrical container.

By using 3 keys and an LED display the sensor measurement range, the display, the PNP-switching outputs and the damping can be adjusted or the behaviour in the case of failure and the release of the fast adjustment can be set.

The switching state of the two PNP-switching output is signalled by one LED for every output.

Technical data

Power supply

Output variants A / B / C / D: 4 to 20 mA, 2-wire

Output variants E / F / G / H: 0 .. 10 V, 3-wire

Permitted supply voltage:

    Version C / D: 12.5 V to 45 V DC

    Variant A / B / E / F / G / H: 16.5 V to 45 V DC

Ripple: ≤ 2 Vpp

Temperature deviation: ≤ 0.2% / 10 K of the nominal measurement range

Accuracy: ≤ 0.1% / 0.2% of the nominal span

calibration deviation: ≤ 0.05% of the nominal measurement range

Long term drift: ≤ 0.1% / year of nominal measurement range

Supply voltage influence: ≤ 0.02% / 10V of nominal measurement range

Resolution: better than 1 uA and 0.5 mV (16 bits = 65536 steps)

Delay time output: at damping 1 T90 260 ms typ, max. 310 ms

Adjustment range damping: 0.3 ... 30 seconds / 100 levels

Outputs (S1 / S2): 2x PNP to + VS

Output current: > 250 mA, current limited, short circuit protected


Protection IP67

Membrane material:

     Standard 96% AL2O3

     High-purity AL2O3 99.9%

Process connection material: steel 1.4404 / others on request

Temperature release material: steel 1.4404 / others on request

Sealing material: Viton® / EPDM / Neoprene® / perfluoroelastomer

Material connection housing: steel 1.4301

Material carrying cable: PE / FEP

Fluid Temperature: -40°C ... +125°C (140°C for 1h) in carrying cable -20°C ... +70°C

Ambient: -40°C ... +85°C, at carrying cable -20°C ... +70°C