1-24. (canceled)
25. A frangible fiberglass insulation batt comprising
a pair of fiberglass insulation strips arranged to lie in side-by-side relation to one another and
a frangible adhesive bridge spanning a gap located between the pair of fiberglass insulation strips to produce a frangible bond retaining the fiberglass insulation strips in side-by-side relation.
26. The frangible fiberglass insulation batt of claim 25 comprising
glass fibers bonded together to form a first bond, and
wherein the frangible bond is a second bond different from the first bond.
27. The frangible fiberglass insulation batt of claim 26 wherein the second bond is formed after the first bond.
28. The frangible fiberglass insulation batt of claim 25 wherein the frangible adhesive bond is relatively weak in comparison to the first bond.
29. A frangible fiberglass insulation batt comprising
at least two previously-separated and reattached fiberglass insulation strips arranged to lie in side-by-side relation to another, and
a frangible adhesive bridge spanning a gap between the previously-separated and reattached fiberglass insulation strips to produce a frangible bond.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A conductivity sensor, comprising:
a first pair of sense electrodes having a first cell constant;
a second pair of sense electrodes having a second cell constant different than the first cell constant;
wherein the first and second pairs of sense electrodes are each configured to measure a conductivity of a fluid, and wherein the first and second pairs of sense electrodes combine to increase a range of conductivity measurements that fall below an acceptable error threshold.
2. The conductivity sensor of claim 1, wherein the conductivity sensor is disposed within a dialysis system.
3. The conductivity sensor of claim 1, wherein the first cell constant ranges from 0.1 to 1.0.
4. The conductivity sensor of claim 1, wherein the second cell constant ranges from 1.0 to 5.0.
5. The conductivity sensor of claim 1, wherein the first pair of sense electrodes comprises a first sense electrode and a second sense electrode.
6. The conductivity sensor of claim 5, wherein the second pair of sense electrodes comprises a third sense electrode and a fourth sense electrode.
7. The conductivity sensor of claim 6, wherein the first and second sense electrodes are positioned between a first drive electrode and a second drive electrode.
8. The conductivity sensor of claim 7, wherein the third and fourth sense electrodes are positioned between the second drive electrode and a third drive electrode.
9. The conductivity sensor of claim 8, further comprising a first amplifier configured to measure voltages produced by the first and second pairs of sense electrodes.
10. The conductivity sensor of claim 9, further comprising a second amplifier configured to combine the measured voltages from the first amplifier.
11. The conductivity sensor of claim 10, further comprising an attenuation element configured to achieve scaled current subtraction with the second amplifier.
12. A method of measuring a conductivity of a fluid, comprising the steps of:
measuring a first voltage of the fluid with a first pair of sense electrodes having a first cell constant;
measuring a second voltage of the fluid with a second pair of sense electrodes having a second cell constant different than the first cell constant;
processing the first and second voltages to produce first and second conductivity readings; and
combining the first and second voltages to produce a combined conductivity reading that falls below an acceptable error threshold.
13. The method of claim 12, wherein the processing step further comprises processing the first and second voltages with a first amplifier to produce the first and second conductivity readings.
14. The method of claim 13, wherein the combining step further comprises combining the first and second voltages with a second amplifier to produce the combined conductivity reading that falls below the acceptable error threshold.
15. The method of claim 12, wherein the first cell constant ranges from 0.1 to 1.0.
16. The method of claim 12, wherein the second cell constant ranges from 1.0 to 5.0.
17. A dialysis system, comprising:
a water purification system configured to purify a water source for use with dialysis treatment;
a dialysis delivery system configured to produce a dialysate from water purified by the water purification system, and further configured to provide dialysis treatment to a patient; and
a conductivity sensor disposed in at least one of the water purification system and the dialysis delivery system, the conductivity sensor comprising a first pair of sense electrodes having a first cell constant, and a second pair of sense electrodes having a second cell constant different than the first cell constant, wherein the first and second pairs of sense electrodes are each configured to measure a conductivity of a fluid, and wherein the first and second pairs of sense electrodes combine to increase a range of conductivity measurements that fall below an acceptable error threshold.
18. The dialysis system of claim 17, wherein the first cell constant ranges from 0.1 to 1.0.
19. The dialysis system of claim 17, wherein the second cell constant ranges from 1.0 to 5.0.