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Capcont M

Capcont M

for capacitive fill level supervision in liquids and solid materials

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  • Fill level resp. limit value detection in container

  • Dry run protection for pumps

  • Useable in liquids, viscous substances, granular materials or powders

  • Useable for electrically conductive and non-conductive substances

  • Suitable for a wide process temperature range from -30°C to +125 °C

  • Useable at process pressures from -1 to 10 bar

  • Fully isolated electrode rod with isolation 1mm in PTFE

  • Integrated evaluation electronic with PNP switching output - invertable

Application description

The devices of the series Capcont M with integrated evaluation electronic are compact fill level limit switches for supervision of fill levels in liquids and solid materials in containers or pipelins at process temperatures from -30°C to +125°C and process pressures from -1 up to 10 bar.   


The device is suitable for limit value detection or also as dry run protection in liquids and viscous substances but also in powdery and fine-grained materials, like e.g. grain, flour, powdered milk, mixing food, cement, chalk or gypsum. It can be used in electrically conductive as well as non-conductive materials.

Function description

The fill level limit switch Capcont M is a capacitive operating sensor with limit value detection.  


Electroden rod, filling material and container wall realizes an electrical capacitor. A fill material changing causes a capacity change that is evaluated by the electronic and is converted into a corresponding switching reaction. At transgression or underrun of the limit value a switching signal at the PNP switching output is created. This allows a control of relays, contractors, magnetic valves, light signaling units, horn as well as SPS inputs. A plugable yellow LED indicates an active PNP switching output.  


A possibility for change over the minimum / maximum safety is integrated. The Die adjustment of the reaction sensivity is made by a potentiometer.


Technichal data

Power supply
Supply voltage:  10 V bis 35 V DC protected against polarity reversal
Residual ripple :  ≤ 2 VSS only within the permissible voltage limits
Current consumption: ≤ 10mA switching outputs in idle mode
Isolation voltage:  75VDC

Switching output
Function:  PNP-switching on  +Vs, principle (NO/NC) invertible via jumper
Output voltage:  VS1 ≥ +Vs – 2 V
Output current:  ≤ 250 mA current-limited, shortcircuit proof
Rise time: ≤ 30 μs RL ≤ 3 000 Ω resp. IL ≥ 4,5 mA
Delay time:  ≤ 200 ms / ≥ 5 Hz
Switching cycles:  ≥ 100.000.000
Switching hysteresis: depends on the media
Sensitivity adjustment: multi-start trimmer

Rod isolation:  PTFE – polytetrafluoroethylene (Teflon®)
(medium contact)
Process connection:  Steel 1.4404 (AISI 316L) resp. 1.4571 (AISI 316Ti) (medium contact)
Connection housing:  die-cast aluminium housing in powder-coated finish
Cable screw connection:  brass nickel-plated screw, sealing CR / NBR
Sealing:  medium-contact  FPM – Fluorelastomer (Viton®)
 EPDM – Etylen-P