Waste water immersion probe
The invention relates to a waste water immersion probe ( 10 ) comprising a liquid-tight housing ( 11 ), a sensor ( 18 ) which is disposed in the housing ( 11 ) and a sensor window ( 20 ) formed on the housing ( 11 ). A wiper element ( 22 ) for cleaning the sensor window ( 20 ) is arranged on the outside of the sensor window ( 20 ), and the wiper element ( 22 ) is driven by a drive motor ( 24 ) which is arranged essentially in the housing ( 11 ). The housing is devoid of openings. A magnetic element ( 36, 37 ) is associated with the drive motor ( 24 ) and a magnetic element ( 34, 35 ) is associated with the wiper element ( 22 ) in such a manner that the magnetic drive motor element ( 36, 37 ) produces a magnetic field which transverses the housing wall and transmits a drive torque to the wiper element ( 22 ) without a shaft.
1. A waste water immersion probe comprising a housing configured so as to be liquid-tight, the housing having a sensor disposed therein and a sensor window, wherein
the sensor window is associated with a wiper on an outer side, for cleaning the sensor window, and
the wiper is driven by a drive motor arranged in the housing,
characterized in that
the housing is devoid of openings,
the drive motor drives a magnetic drive motor element in the housing, and
the wiper is associated with a magnetic wiper element outside the housing such that the magnetic drive motor element generates a magnetic field permeating the housing and transmits a drive torque to the magnetic wiper element without a shaft.
2. The waste water immersion probe of claim 1 , characterized in that the drive motor element and the magnetic wiper element are passive magnetic elements.
3. The waste water immersion probe of claim 1 , characterized in that the magnetic drive motor element is an active magnetic element and the magnetic wiper element is a passive magnetic element.
4. The waste water immersion probe of claim 1 , wherein the wiper is mobile in an oscillating wiping movement, and
wherein the housing further comprises a housing stop element and the wiper comprises a wiper stop element operable to limit the oscillating wiping movement of the wiper.
5. The waste water immersion probe of claim 4 , wherein:
the wiper comprises an annular wiper body that is closed, wherein the annular wiper body contains the magnetic wiper element, and wherein the annular wiper body surrounds a pot containing the magnetic drive motor element;
a radial play is provided between the annular wiper body and the pot, wherein radial guiding is effected exclusively by a locking disc mounted centrally in an axial direction on the pot; and
the annular wiper body is biased axially by the magnetic wiper element and the magnetic drive motor element.
6. The waste water immersion probe of claim 4 , wherein:
the wiper comprises an annular wiper body ( 30 ), and wherein the housing is associated with a spoiler radially covering a gap opening between the annular wiper body (and the housing;
a radial play is provided between the annular wiper body and a pot, wherein radial guiding is effected exclusively by a locking disc mounted centrally in an axial direction on the pot; and
the annular wiper body is biased axially by the magnetic wiper element and the magnetic drive motor element.
7. The waste water immersion probe of claim 4 , wherein:
the wiper comprises an annular wiper body that is closed, wherein the annular wiper body contains the magnetic wiper element, and wherein the annular wiper body surrounds a pot containing the magnetic drive motor element;
a radial play is provided between the annular wiper body and the pot, wherein radial guiding is effected exclusively by a locking disc mounted centrally in an axial direction on the pot; and
the locking disc and the pot have locking elements by which the locking disc is operable to be locked to the pot in a locked position.
8. The waste water immersion probe of claim 4 , wherein:
the wiper comprises an annular wiper body, and wherein the housing is associated with a spoiler radially covering a gap opening between the annular wiper body and the housing;
a radial play is provided between the annular wiper body and a pot, wherein radial guiding is effected exclusively by a locking disc mounted centrally in an axial direction on the pot; and
the locking disc and the pot have locking elements by which the locking disc is operable to be locked to the pot in a locked position.
9. The waste water immersion probe of claim 1 , characterized in that the wiper comprises a closed annular wiper body, wherein the annular wiper body contains the magnetic wiper elements, and wherein the annular wiper body surrounds a pot containing the magnetic drive motor element.
10. The waste water immersion probe of claim 9 , characterized in that a radial play is provided between the annular wiper body and the pot, wherein radial guiding is effected exclusively by a locking disc mounted centrally in an axial direction on the pot.
11. The waste water immersion probe of claim 10 , characterized in that the locking disc and the pot have locking elements by which the locking disc is operable to be locked to the pot in a locked position.
12. The waste water immersion probe of claim 1 , wherein the wiper comprises an annular wiper body, and wherein the housing is associated with a spoiler radially covering a gap opening between the annular wiper body and the housing.
13. The waste water immersion probe of claim 12 , characterized in that a radial play is provided between the annular wiper body and a pot, wherein radial guiding is effected exclusively by a locking disc mounted centrally in an axial direction on the pot.
14. The waste water immersion probe of claim 13 , wherein the annular wiper body is biased axially by the magnetic wiper element and the magnetic drive motor element.
15. The waste water immersion probe of claim 13 , characterized in that the locking disc and the pot have locking elements by which the locking disc is operable to be locked to the pot in a locked position.
16. The waste water immersion probe of claim 1 , further comprising an annular wiper body that is biased axially by the magnetic wiper element and the magnetic drive motor element.