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Horst Miracle Probe Sensors for RV Black Water Tanks - Qty 4
Valterra

Horst Miracle Probe Sensors for RV Black Water Tanks - Qty 4

Part Number: T21301VP
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$32.59
Retail:$50.04
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Get an accurate reading of waste levels in your RV's black-water tank. Extra-long sensors are surrounded by Teflon to prevent false probe contact and incorrect sensor readings. Fits 3/8" diameter holes. Connects to existing wiring. Great Prices for the best smart rv from Valterra. Horst Miracle Probe Sensors for RV Black Water Tanks - Qty 4 part number T21301VP can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Valterra Smart RV - T21301VP

  • Monitoring System
  • Water Tanks
  • Valterra
  • No Display

Get an accurate reading of waste levels in your RV's black-water tank. Extra-long sensors are surrounded by Teflon to prevent false probe contact and incorrect sensor readings. Fits 3/8" diameter holes. Connects to existing wiring.


Features:

  • Provides an accurate indication of waste levels in your RV's black-water tank
  • Prevents false probe contact and incorrect sensor readings
    • Delrin body and Teflon tube surround sensor to prevent liquid residue or sludge from sticking to sensor
    • Considerably longer than standard probes to prevent false readings from buildup on sides of tank
  • Easy to install - fits 3/8" diameter holes
    • Use existing holes or drill new holes next to existing probes
  • Designed for RVs built to RVIA, CSA, and IAPMO standards
  • Connects to existing wiring and monitors
  • Quantity: 4 probes


How Miracle Probes Work

The monitor for your RV's black water tank shows a full reading when electricity is flowing between the tank's sensors. This circuit of electricity is completed when there is water or sludge in your tanks. If your empty tank is showing a full reading, that means water and sludge has built up on the sensors or the sides of the tank. This buildup completes the electrical circuit to give you a false reading.


Teflon Tube on Horst Miracle Probe

Unlike other sensors, which are prone to false readings due to buildup, Miracle Probes are surrounded by Teflon. The Teflon covers each Miracle Probe like a roof, helping to prevent liquid residue or toilet paper from building up on the probe. In addition, Teflon is not a conductive material and sludge cannot stick to Teflon. Miracle Probes are also longer than standard sensors, which prevents the probes from making contact with sludge that builds up on the sides of the tank.


Because sludge cannot build up on the Miracle Probes, a complete electrical circuit is only made when your tank is full and the water or sludge in the tank makes contact with the copper tips of the probes. This means that you'll only see a full tank reading on your monitor when your tank actually needs to be emptied.


Installation

The probes easily install into your RV black water tank's existing 3/8" diameter holes. You can also drill new holes next to the existing holes.


First, remove the existing sensors from the holes in your black water tank and replace them with the Miracle Probes. Once you have pushed the Miracle Probes into the holes, tighten the nut on each probe to create a leakproof seal. Then connect existing wiring to the new probes.


Once installed, rotate the exterior stud so that the milled flat section of the stud is aiming down and the Teflon roof is covering the copper tip of the probe.



T21301VP Valterra Horst Miracle Probes for Motorhome Black Water Holding Tanks - Qty 4




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Customer Satisfaction Score:


Customer Reviews

Horst Miracle Probe Sensors for RV Black Water Tanks - Qty 4 - T21301VP

Average Customer Rating:  4.7 out of 5 stars   (94 Customer Reviews)

Get an accurate reading of waste levels in your RV's black-water tank. Extra-long sensors are surrounded by Teflon to prevent false probe contact and incorrect sensor readings. Fits 3/8" diameter holes. Connects to existing wiring.

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Easy install and works great



by:

Just received and have installed. Time will tell.
Ordering was easy and they arrived on time.



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delivered as described,happy buyer



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Installed pretty easy.



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They are as described. fast shipping



by:

as alsways greet job on shipping & price thankyou Jim T



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Great product very easily installed.



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Fast shipping. Prices & shipping are so so. Have not installed the product yet but looks as advertised.



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So far they are working just fine.



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Best probes going not I feel confident that my tanks will not over flow.



by:

Great service, arrived early, just what we needed, and the price was the best we found. will be a return customer no doubt.



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Replaced sensors in the gray water tank on my motorhome. Working great.



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Happy with this product as I am with black water version. Had them drop shipped to ETI where trailer was built. So far they are functioning flawlessly.



by:

I have not installed these yet, but I will be very soon! I am replacing my cracked, black tank, dump valves,and these new style of sensors with a hood inside to cover the probe, and ensure accurate level reading! I'm also installing a brand new, majorly upgraded toilet, at least compared to the plastic, super short thing that was installed in 1988!! It's gonna be great to have all systems go, and a normal height toilet! No more falling backwards to sit! ?? Thanks again etrailer!!! You guys ROCK!!!



by:

Wonderful product. Soooo easy to install (drill new hole, insert probe correctly oriented and gently tighten seal jam nut, transfer electrical wire and secure - DONE) I have had no reoccurrence of error readings. Highly recommended. Excellent on time delivery. I am so pleased with this product.

Gary profile picture

Gary

8/28/2019

I am getting 12 and 34 readings when empty. I will do a good tank flush and rotary spray and I am sure it will all be good.



by:

The black tank sensors were very easy to install. My old sensors are spin welded so I had to drill new holes. There were no instructions included but are available on the net. If manufacturers would pay attention to the fine print, "place the bottom - sensor 8" to 13" away from the others." we wouldn't have so much trouble with the readout.

Rgill profile picture

Rgill

2/5/2018

The new tank sensors make the KIP unite work right when mounted in the tanks 8 inches away from the bottom sensor.



by:

I got them a few days ago and today I installed them with little or no trouble. When I finished the tank level display showed empty. So I filled the tank with water to test them, and so far they are working well. After filling and emptying the tank the level indication returned to empty.

Mcgee-gamboa profile picture

Mcgee-gamboa

12/12/2022

They are still working fine I am very satisfied with this product.



by:

I installed these on both black and gray water tanks in our 1995 Itasca "Sunrise". Installation was straight forward with no unexpected issues or obstacles. They have functioned as advertised and provide much improved level readings for the tanks. I would note that I take time to rinse and flush the tanks after dumping and use a down the toilet spray wand for better cleaning.



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i installed them in the black and grey tanks. installation is easy if you can access the old ones. they seem to be very accurate.



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I installed the probesin my black tank soon after I got them I found that I could not install them in the holes of the old ones so I plugged those holes with bolts and Silicone. The one's I purchased for the other tanks I haven't installed yet. I will install them before spring. I think the new probes are a little better but I still get wrong readings. It was difficult drilling holes because of the space around the tank



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I replaced and old set of horst probes thinking that they may not have been the new improved ones with the guard around the probe. My first set ( factory installed ) worked well for a few months then became problematic. They did have the nylon guard(s), however, I replaced them anyway and have had the same results with the replacement ones. The sensor placement in the black tank from the manufacture could be a contributing factor as they are located at the end of the tank where it drains and not on the side where most manufactures place them. Mine are stacked directly over each other in a vertical line. Does not seem to be the best placement from what I have been able to research.



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These sensors have a plastic hood that prevents the buildup of solids and tissure paper that produce false readings. These sensors don't provide as much data as something like the SeeLevel system, but for most casual full-hookup-to-full-hookup campers, they are plenty good enough.



by:

These were easy to install. Most RV tanks have 3/8 inch holes but the old ones can be real stubborn to remove. I remove the electrical cable, loosen, not remove, the nut closest to the washer, then use curved needle nose pliers to give some decent leverage, you may find the bulged rubber won't give without tearing the rubber (not the tank) or a portion might drop back inside the tank. They'll likely just flush out eventually but a 3/8 wood bit drilling new holes can work too. Then installing was simple just make sure the flat part on the threaded part is level so your probe shield is aligned to protect the probe.



by:

They appear to help some with false readings but still have to rinse the black and grey tank after each dump to clean the sensors. Have to fill the tanks up with fresh water and dump a second time to clean the sensors so they work properly.


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    For a Horst Probe for a black water tank you would want the part # T21301VP for a quantity of 4 or for a gray water tank you would need the part # T21302VP. The probes of these kits are straight and are not a knock-off. There was a design change though which helps prevent debris getting caught in the tank. If you check out the picture I attached you will see what was prone to happen with old design.
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  • Why Would Blank Tank Full Sensors Give False Full Reading When Sensors are New
    When RV holding tank sensors incorrectly read full, it is typically due to residue. Since your trailer sat for a while it's very likely there is residue of some kind on the sensors. The best way to keep your tanks sensors working correctly is to take proper care of the tank itself. The waste tanks are more prone to sensor issues, simply because of the nature of the materials contained than fresh water tanks. What you need is a tank cleaner like the part # CAM41146 to break up everything...
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  • Maintenance of Horst Miracles Probe Sensors for RV Black Water Tanks
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  • Can the Horst Miracle Probe Sensors be Used with an Aluminum Tank
    I spoke with my contact at Valterra. The Horst Miracle Probe Sensors, part # T21301VP, should not be used with any metal tank. The metal will interfere with the readings, rendering them inaccurate.
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  • Compatibility of Valterra Black Water Tank Sensors with Existing System
    The Horst Miracle Probe Sensors for RV Black Water Tanks - Qty 4 # T21301VP will work with an exiting system where the sensor is installed on the top. The probes easily install into your RV black water tank's existing 3/8" diameter holes or you can also drill new holes next to the existing holes. These sensors have a Teflon sleeve surround to prevent build up and give you a more accurate reading.
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Info for this part was:

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