Installing the CMP5000

Last update: 15/03/2021
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The installation instructions can also to be found in the Quick Start Guide.

Borehole methods

The CMP5000 can be installed on its own or with a complementary hole liner (sold separately).

We recommend the use of the plastic liner for a few reasons:

  • To comply with most of the standard test methods for determining relative humidity in concrete floor slabs
    • Note: There are different standards and regulations for measuring concrete RH in drilled holes. Verify which is applicable for each case and region.
  • To make sure the sensor is measuring the humidity levels in the right depth, instead of the average moisture from the entire hole
  • To protect the probe enclosure from scratches and extend its lifetime

Installation CMP5000 probe and hole liner

Method A – Probe with hole liner

  1. Verify the thickness of the concrete slab to determine the depth of the holes you will be drilling, according to the standard or guidelines you are following.
  2. Drill a hole with Ø 18 – 20 mm, and the required depth. Verify your standard or procedure in regards to the maximum diameter.
    • Obs: The liner is Ø 17.3 mm, Ø 20 mm with the ribs.
  3. Use a steel wire brush for concrete to clean the hole.
  4. Vacuum the hole to remove dust and small particles.
  5. Verify that the hole depth is correct.
    • Note: There are often debris and irregularities that can block the proper insertion of the liner.
  6. Insert the liner, making sure it is reaching the bottom of the hole (A). If needed, clean the hole again, or repeat steps (3) to (5) to make its walls more uniform.
  7. Insert the probe into the liner, and make sure it is reaching the bottom.
  8. Immediately connect the probe to Gaia 220, and keep it connected all the time.
  9. Thoroughly seal around the liner at the surface (B) and also at the top of the liner (C) using butyl-based dry sealant or similar, so no air can escape from it.
CMP5000 probe installation with hole liner

Method B – Probe only

  1. Verify the thickness of the concrete slab to determine the depth of the holes you’ll be drilling, according to the standard or guidelines you are following.
  2. Drill a hole with Ø 16 mm or more, and the required depth. Verify your standard or procedure in regards to the maximum diameter.
    • Obs: The probe is Ø 14 mm.
  3. Use a steel wire brush for concrete to clean the hole.
  4. Vacuum the hole to remove dust and small particles.
  5. Verify that the hole depth is correct. You can use the probe for this, drawing a line with a marker.
    • Note: There are often debris and irregularities that can block the proper insertion of the liner.
  6. Insert the probe into the hole, and make sure it is reaching the bottom of the hole. If needed, clean the hole again, or repeat steps (3) to (5) to make the hole walls more uniform.
  7. Immediately connect the probe to Gaia 220, and keep it connected all the time.
  8. Thoroughly seal around the probe at the surface using dry butyl-based sealant or similar, so no air can escape from the hole.
CMP5000 probe installation probe only

Cast into fresh concrete

  1. Determine the placement of the probes in the area to be monitored.
  2. Verify the thickness of the concrete slab to determine in which depth the probe will be positioned, according to the standard or guidelines you are following.
  3. Install a humidity probe at the correct depth using plastic cable ties or another preferred method. The sensor is situated at the tip of the probe.
  4. Immediately connect the probe to Gaia 220, and keep it connected all the time.
  5. Check again that the probe tip is at the correct depth prior to pouring and take measures to ensure that it will remain at the correct depth after pouring.
Remember: It is very important that the probe is connected to Gaia 220 prior to pouring and while in use. If the transmitter is not connected, the sensor can be permanently damaged and provide inaccurate results.
CMP5000 probe installation cast into fresh concrete
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