Horst Miracle Probes

Inaccurate level readings from fresh and waste water tanks are annoying and frustrating for both Caravan and Motorhome enthusiasts.


But, fret no more, Horst Miracle Probes are here!


All you have to do is simply insert Horst Miracle probes next to your current probes and swap the electrical connections over!

The Horst Miracle Probe

  • Remains accurate - even with a 'sludge film' build up!

  • Are easy to install!
  • Works with your existing electrical circuit and control panel!

Why do they work?!

  • They have a special Teflon coating that eliminates false electrial readings.
  • Tank sludge does stick to the Teflon.
  • Teflon does not conduct an electrical current.
  • Traditional probes do not function correctly after a while due to an electrical circuit being made between the 'sludge film' on the inside of your tank and all of the probes at the same time.As a result a false reading is transmitted to the control panel.See below.


The Set up

  • The three probes on the left are positioned to sense the water levels at 25% 50% and 75%. They are designated +ve in the electrical circuit.
  • Most tanks in the UK are fitted with five stud indicators but Horst Miracle probes are supplied in packs of four or five..
  • The single probe on the bottom right is assigned as the -ve in the electrical circuit.
  • When powered, electrical current flows between the metal tips of the probes connected to the +ve and -ve sides of the leisure battery.
  • Water contains iron and as the probes are submerged an electrical circuit is made and the relevant indicator on the control panel is energised.

Buy Miracle Probe

Sold in sets of four or five probes.


  • You can simply install Horst Miracle Probes yourself. Although if you do not feel confident then....
  • Any Motorhome or Caravan Dealer with an approved workshop can install the Horst Miracle Probes.
  • The simplest way to install Horst Miracle Probes is to mount them next to your existing probes and simply switch the electrical connections over.
  • The Horst miracle Probe needs a 9.5mm [3/8"] hole. You then insert the probe and tighten the first nut to make a firm leak proof seal.


  • Connect the electrial wires in the same sequence as your current installation using the second nut provided with each Miracle probe to secure the electrial connection.


  • Horst Miracle Probe is covered by warranty.
  • If you need clarification please contact us via our Customer support page.

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