The TQC Concrete Moisture Meter is a non-destructive moisture meter for concrete. By means of measuring the electrical impedance the moisture content of concrete can easily be determined by just pressing the instrument against the concrete surface.

The electrical impedance is measured through generating a low frequency electric field between 8 electrodes at the bottom of the instrument. Depending on the moisture content the measurements are made to a depth of several centimeters. Four scales allow flexible use of the instrument as an accurate measuring device or just as a detector to find moisture traces or leakage:

1. Concrete 0-6% H2O
   Concrete scale may be used only for concrete surfaces. It shows the relation between weight of pure water contained in the tested material with its dry weight. The scale range varies between 0 and 6% as 6% is about maximal physically possible content of water in the concrete. The obtained results should not be confused with moisture emission or any other moisture measurement methods.
   
2. Carbide Method 0-4% H2O
   Concrete scale shows concrete moisture according to the carbide method.
   
3. Relative Scale 0-100%
   Relative scale may be used in moisture level comparison of various materials. Obtained results should not be interpreted as percentage content of water in tested surfaces There is no linear correlation between the outcomes and relative humidity. The scale should be used only as comparison technique. Scale may be used on the surfaces where direct contact with pure concrete is impossible because of some layer/covering.
   
4. 15. Scale 0.3 - 15.3m
   15. Scale works in a similar way as the Relative scale and can be used alongside meters with the same scale which ranges between 0.3 and 15.3.

The meter should be held in the middle while measuring (as shown in the picture) It is recommended to repeat the measurement in a few points situated next to each other as moisture has a tendency of uneven distribution. If the measurements vary, only the highest outcomes should be used.

To switch off the meter press ON/HOLD button for around 2 seconds.

• Though robust in design, this instrument is precison-machined. Never drop it or knock it over.
  
• Always clean the instrument after use.
  
• Clean the instrument using a soft dry cloth. Never clean the instrument by any mechanical means
  such as a wire brush or abrasive paper. Just like the use of aggressive cleaning agents, this may
  cause permanent damage.
  
• Do not use compressed air to clean the instrument.
  
• Always keep the instrument in its case when not in use.