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Old 05-24-2013, 07:51 PM   #11
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Quote:
Originally Posted by herk7769 View Post
Your sensors and tank wall are dirty/slimy.

You can try a sensor cleaner, but I had better luck just replacing the sensors with Horst Probes.

Horst Miracle Probes for Wastewater Tanks in Recreational Vehicles RVs

Horst Miracle Probes Demonstration by Jim Grich of AmericanRVer - YouTube

Horst tank Probe Installation

OK Lou. I have read your previous removal and install of the new probles.
Now be honest. Since you installed have you ever gotton any false readings in either tanks?

Thanks
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Old 05-24-2013, 08:12 PM   #12
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Originally Posted by Iggy View Post
OK Lou. I have read your previous removal and install of the new probles.
Now be honest. Since you installed have you ever gotton any false readings in either tanks?

Thanks
Never the black tank since the install. Standard 1 cap Calgon;1 cap laundry detergent.

No so lucky with the gray tank. Something got on one of the gray water sensors (the spiral ones) and the 1/3 light has been intermittently stuck ON when empty last year.

Troubleshooting the MicroMonitor

If you remember from the article I did on the MicroMonitor system, the resistance on ANY probe to the ground probe only has to drop from infinity (open circuit) to less than 188K Ohms to turn on the 1/3 light.

It has been stubbornly resistant to sensor cleaner. I think I have a hair ball caught on the spiral. When I get back from Cape May I am going to drop the panel and meter the probes to find out which one is my problem.

If I had it to do over again (and I still might) I would spend the extra 10 bucks and put black water sensors (the one with the shielded wire) in the gray tank too.
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Old 05-24-2013, 08:49 PM   #13
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After dumping: About every three trips or so. I add about 10 pounds of ice and about two gallons of water and 1 cup of simple green in the black tank and 1 cup of simple green to the gray tanks. On the drive home it seams to slosh around and clean the tanks up. I am on my third rig now and have never had to replaced a sensor yet !
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Old 05-24-2013, 08:56 PM   #14
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When I swapped out the probes for the Horst unit, this was what the GRAY tank probes looked like.
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Old 05-24-2013, 10:29 PM   #15
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This rig is brand new so I may have to take it back to service. Guess as long as I know the level, it should not be a big issue.
Just a suggestion, if you blast the tank once a month with a tank "rinser" from Wally World for about $9.00 it'll keep the tank probes working. I made one from plastic pipe for about $5.00. Just direct the nozzle towards the sensor end, 2 minutes of cleaning they are working!
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