Capcont L
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For capacitive filling level supervision in liquids and solids
- For use in hygienic areas
- Switching point can be easily adjusted via the sliding sleeve
- Very compact
The device is suitable for limit value detection of also as dry run protection in liquids and viscous substances and also in powdery and fine granular substances, like e.g. grain, flour, powdered milk, mixing food, cement, chalk or gypsum.
It can be used in electrically conductive as well as in non-conductive materials.
The device is certificated for the use as overflow protection acc. to WHG.
Capcont L with integrated evaluation electronic is a compact filling level limit switch for supervision of filling levels in liquids and solids within container or pipes, also in explosive hazardous areas, at process temperatures from – 40°C to +140°C and process pressures from –1 up to 10 bar. Capcont LL with metallic gasket and rod isolation in PEEK is especially suitable for the use in hygienic applications
Function
The device is a capacitive operating sensor for limit value detection.
Electrode rod, filling material and container wall creates an electrical capacitor.
The contact of the electrode rod with the filling material produces a variation in capacity, that is evaluated by the electronic and converted in a correspondent switching action.
The detection of a filling level signal is indicated at the plug side of the device by a yellow LED and converted into a switching command and output at the PNP switching output.
This allows the drive of relays, contactors, magnetic vents, optical indicators, horns as well as of SPS inputs.
At a switching reaction, the voltage of the connection terminal 1 (+L) is output alternating by two contrary operated semiconductor switches at two connection terminals.
The adjustment of the responsitivity of the device to the respective filling material is done by a potentiometer.
Capcont LS is mounted from the top side of the pressure container or of the pipe. Capcont LL is mounted from the top side or into the side wall of the pressure container or of the pipe
| Auxiliary power | |
| Supply voltage | 10 V… 35 V DC (protected against polarity reversal) |
| Current consumption | ≤ 10mA switching outputs in idle mode |
| Switching output | |
| Function | PNP-transistor output, on contact +L |
| Output current | ≤ 500mA current-limited, shortcircuit proof |
| Reverse current | ≤ 100µA |
| Delay time | ≤ 200ms ≥ 5Hz |
| Switching hysteresis | depends on the media |
| Sensitivity adjustment | multi-start trimmer |
| Materials | |
| Rod isolation | Capcont LS PTFE – polytetrafluoroethylene (Teflon®) Capcont LL PEEK |
| Process connection | Steel 1.4404 (AISI 316L) Steel 1.4571 (AISI 316Ti) |
| Plug M12x1 | frame CrNi-Steel insert PUR contact gold-coated |
| Sealing (medium-contact) | FPM – fluorelastomer (Viton®) (LS) EPDM – ethylene-propylene-diene monomer other FPM – fluorelastomer (Viton®) |
| Environmental conditions | |
| Ambient temperature | -40°C…+100°C (Restrictions for Ex design) |
| Process temperature | Capcont LS: -40°C…+100°C (Restrictions for Ex design) Capcont LL: -40°C…+140°C (Restrictions for Ex design) |
| Process pressure | Capcont LS: -1bar … +1bar Capcont LL: -1bar … +10bar |
| Protection class | IP68 / 3mH20 for 1h DIN EN 60529 |
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