Level sensor für water and waste water Ø 22mm
4-20 mA - output, optional temperature measurement Pt100, dry capacitive measurement system + over voltage protection
| Advantages |
Continuous fill level measurement in reservoirs, clarification basins, deep wells and boreholes
Various materials selectable for sensor, cable and gaskets, therefore the use in various media is possible
Slim construction design, 22mm diameter
Very stable special cable with steel mesh and pressure compensation capillary
No elongation of the cable also at high depths slopes
Food and drinking water suitable materials
High-precision dry capacitive ceramic measuring cell
| Application description |
The filling level sensor Hydrocont® M with integrated analogue evaluation electronic is a compact transmitter for continuous measuring of fill levels and temperatures in liquid media.
This includes e.g. the measurement of levels in reservoirs, clarification basins, deep wells etc., but also the fill level measurement in closed containers.
For applications, where food or drink water suitability is necessary, a corresponding variant can be ordered.
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 various applications with liquid media like water, waste water, solvents, oil, sludge, grease, cleaning agents, etc.
Besides the level measurement it is possible to get the temperature of the medium by an integrated Pt100 resistor in parallel with this sensor.
| Function description |
The sensor of the fill level measurement system Hydrocont® M is put into the medium by the carrying cable by using a suitable fixing e.g. cable clamp fixing, screw plug or connection housing.
The liquid medium contacts directly without using a pressure transferring liquid the ceramic membrane 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 e.g. 25-times of nominal load at a sensor with a pressure range of 0...100 mbar without damage.
The filling level proportional hydrostatic pressure signal of the ceramic membrane is measured by the integrated analogue electronic and converted in a output current signal of 4…20mA.
The measurement signal range is adjusted by factory in many standard measurement ranges. A factory provided adjustment by customer specification is also possible.
Optionally a temperature dependent resistor Pt100 in 3-wire-technic can be integrated in the sensor. By this temperature measurement resistor a temperature measurement of the filling medium with removing the lead resistance can be realized in parallel to the filling level measurement. When using a wall mounting connection housing a Pt100 transmitter that is adjusted by customer specification can be integrated.
Integrated over voltage protection components prevents the filling level sensor from destruction by atmospheric influences like e.g. thunderstrike.
| Technichal data |
Output signal: 4 .. 20 mA, 2-wire
Permitted supply voltage:
Output signal 4...20mA: 11 V up to 45 V DC
Output signal 10...10 V: 14...30 V DC
at Ex-Variation 12,5 V up to 25,2 V DC
Ripple: ≤ 2 Vpp (condition: within the permitted supply voltage range)
Temperature drift: ≤ 0.15% / 10 K of the nominal measurement range
Accuracy: ≤ 0.1% / 0.25% of the nominal measurement range (see order code)
Calibration deviation: ≤ 0.05% of the nominal measurement range
Long term stability: ≤ 0.15% / year of nominal measurement range
Supply voltage influence: ≤ 0.02% / 10V of nominal measurement range
Resolution: infinite, because analog measurement electronics
Delay time output:
T90 <100us
Industrial environment, class A
Surge protection: Max signal voltage: 30V (peak value; to ground)
Nominal discharge current: 2 500A (wave 8/20μS)
Temperature-measuring resistance:
Pt100 class B 3-wire connection
0°C - Deviation + / - 0.30 Kelvin
End point error + / - (0.30 K + 0.005 K per K DT0°C)
(Optional built-in wall mounting case Pt100 - Transmitter
Type e.g. KTM, which is adjusted according to customer specification)
Temperature-measuring resistance is not possible for Ex versions
Protection:
IP68 Sensor slopes
End Cap / Connector Housing IP67
Wall-mounted housing IP65
Membrane Material: Ceramic AL2O3 96%
Material slopes Sensor: steel 1.4404
Cap material: steel 1.4404
Sealing material: FPM (Viton®) / EPDM / Neoprene®
Material connection housing: Polyacetal POM (Delrin®), screw steel 1.4404
Material carrying cable: PE / PUR
Allowable product temperature: -20°C ... +70°C