Toroid conductivity sensor
First Claim
Patent Images
1. An inductive conductivity sensor for measuring conductivity of a fluid, comprising:
- a housing arranged to be positioned adjacent the fluid;
a controlled impedance loop supported by the housing; and
a transducer supported by the housing, the transducer including;
a driver for inducing a first current into fluid adjacent the housing and for inducing a second current into the controlled impedance loop; and
a detector for inductively measuring the first and second currents.
1 Assignment
0 Petitions
Accused Products
Abstract
A inductive conductivity sensor for measuring conductivity of a fluid includes a housing supporting a controlled impedance loop and a transducer. The transducer includes a driver for inducing a first current into the fluid adjacent the housing, and for inducing a second current into the controlled impedance loop. The transducer further includes a detector for inductively measuring the first and second currents.
-
Citations
20 Claims
-
1. An inductive conductivity sensor for measuring conductivity of a fluid, comprising:
-
a housing arranged to be positioned adjacent the fluid;
a controlled impedance loop supported by the housing; and
a transducer supported by the housing, the transducer including;
a driver for inducing a first current into fluid adjacent the housing and for inducing a second current into the controlled impedance loop; and
a detector for inductively measuring the first and second currents. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
a conductive wire inductively coupled to the driver and the detector, and a predetermined impedance coupled to the conductive wire. -
5. The sensor of claim 1, wherein the driver includes a first magnetic core adjacent a first end of the housing and a first coil arranged around the first core, and wherein the detector includes a second magnetic core adjacent a second end of the housing and a second coil arranged around the second core, and wherein the controlled impedance loop extends through the first and second cores.
-
6. The sensor of claim 5, wherein the controlled impedance loop includes
a conductive wire inductively coupled to the driver and the detector, and a predetermined impedance coupled to a conductive wire. -
7. The sensor of claim 6, wherein the housing is a substantially cylindrical housing having an axial passage.
-
8. The sensor of claim 7, wherein the housing is arranged to be positioned in contact with the fluid so that the fluid flows through the axial passage.
-
9. The sensor of claim 8, wherein the housing encloses the transducer and the controlled impedance loop.
-
10. The sensor of claim 7, wherein at least a portion of the controlled impedance loop is adjacent the axial passage.
-
11. The sensor of claim 7, wherein the axial passage is arranged to receive a conduit carrying the fluid.
-
12. The sensor of claim 1, wherein the housing is a substantially cylindrical housing having an axial passage.
-
13. The sensor of claim 12, wherein the housing is arranged to be positioned in contact with the fluid so that the fluid flows through the axial passage.
-
14. The sensor of claim 13, wherein the housing encloses the transducer and the controlled impedance loop.
-
15. The sensor of claim 12, wherein at least a portion of the controlled impedance loop is adjacent the axial passage.
-
16. The sensor of claim 12, wherein the axial passage is arranged to receive a conduit carrying the fluid.
-
-
17. An inductive conductivity sensor for measuring conductivity of a fluid, comprising:
-
a substantially cylindrical housing having an axial passage arranged to be positioned adjacent the fluid;
a controlled impedance loop supported by the housing, the controlled impedance loop including;
a conductive wire, and a predetermined impedance coupled to the conductive wire; and
a transducer supported by the housing, the transducer including;
a first magnetic core adjacent a first end of the housing and a first coil arranged around the first core so that a drive current in the first coil induces a magnetic field in the first core which induces a measurement current in the fluid adjacent the first core and induces a base current in the conductive wire; and
a second core adjacent a second end of the housing and a second coil arranged around the second core detector the second core and second coil being arranged with the fluid and the conductive wire so that measurement current in the fluid and base current in the conductive wire induce a magnetic field in the second core which induces a pickup current in the second coil, the pickup current being based on the conductivity of the fluid and the predetermined impedance. - View Dependent Claims (18, 19, 20)
-
Specification