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WOOD/BUILDING MATERIAL

MOISTURE METER (MT1901)

PLEASE READ ALL OF THE INSTRUCTIONS BEFORE 

USING THE MOISTURE METER.

This instrument can be used to measure the amount of water in the wood, 

building material, and measure the environment temperature.

FEATURES:

Display: VA screen, with black background & white digital display.

Measurement range: 

         Wood: 6 to 60%

         Building material: 1.5 to 33%

         Temperature: 0 to 50°C ( 32 to 122°F )

Resolution: 

         Wood and Building material: 0.1%

         Temperature: 0 .1°C ( 0.1°F)

Accuracy: 

         Wood and Building material: ± 2%

         Temperature: ± 2°C ( ± 4°F )

8 calibration scales(A, B, C, D, E, F, G, H), based on different types of wood 

materials.

Hold function to freeze the measurement.

Memory function: If you have held the value and then turn off the instrument, 

you will see the same value when you turn on the instrument again.

Low battery indication(< 2.2V).

Automatic Power-Off in 3 minutes without operation.

Power: 2xLR03 AAA 1.5V batteries.

Operating Environment: 

          Temperature

0 - 40°C

          Relative Humidity < 85%

INSTALLING BATTERY:

1. Remove the battery compartment cover.

2. Insert the batteries with the correct polarity.

3. Reattach the battery compartment cover.

REMOVING PROTECTIVE CAP: 

To remove the protective cap, press the “        ” position and push the cap as 

the illustration below to open the cap.

CORRECT

WRONG

OPERATION INSTRUCTION:

1.Press the “       ” button to turn on the instrument, press and hold the “       ” 

   button for about 3 seconds to turn off the instrument.

2.Selecting desired Measurement Mode:

a. After turn on the instrument, press the “       ” button to select desired 

    measurement mode.

    The two measurement modes are as follows:

    Wood moisture measurement mode (“WOOD” displays), building material 

    moisture measurement mode (“BLDG”display). 

    Wood moisture measurement mode has 8 calibration scales(A, B, C, D, E, F,

    G, H), based on different types of wood materials. 

    Check the Calibration Tables first, and then press the “       ” button to switch 

    to the matched calibration scale. 

b. After the desired measurement mode is selected, you can start 

    measurement.

c.Temperature measurement mode displays in Celsius temperature 

    measurement mode ( “°C”displays) and Fahrenheit temperature 

    measurement mode ( “°F”displays). 

    Press and hold the “        ” button 3 seconds to switch between °C and °F.

3.Performing Measurement

   a. For temperature measurement, the display shows the present environment 

       temperature directly.

   b. Before taking the first measurement check that the instrument is 

       functioning correctly. 

       For this you will need to use the test aid. 

       On the test aid there are two measurement holes as picture.

Switch to Wood moisture measurement mode (“WOOD” displays) and 

choose A scale. 

Insert the measuring pins into the measurement holes, the measuring 

value on the display will show between 16.6% to 20.6%.

The instrument is workable when measured value was in the error range.

  c.To perform moisture measurement, press both pins into the wood or 

     material to be measured, read the value on the display.

  d. Measured value will appear on the LCD, and Red, Yellow and Green 

      LED color light indicate the moisture condition level  at the same time. 

      There will a Beep sound when Red LED color light on.

      Wood: GREEN: Low moisture (< 12%); 

                  YELLOW: Mid moisture (12% - 15.9%);  

                  RED: High moisture (16%-60%).

      Building material: GREEN: Low moisture (< 17%); 

                  YELLOW: Mid moisture (17% - 19.9%);  

                  RED: High moisture (20%-33%).

4.  Freeze the measurement

    Press the “        ” button to saved measured value, the “HOLD” will show 

    on the screen. By pressing the “        ” or “        ” or “        ” button, the 

    measuring mode will get reactivated.

5. Automatic Power-Off feature

    If you don’t operate the instrument (or the reading does not change) about 

    3 minutes, the instrument will be turned off automatically.

6.When the symbol “       ” appears, it indicates the batteries are low and 

   should be replaced.

MAINTENANCE:

The moisture meter has been designed to be a low maintenance instrument. 

However, in order to maintain its performance, you must always follow these 

simple directions:

• AVOID exposing the instrument to shock, continuous vibration, or extreme 

   hot or cold temperatures.

• ALWAYS attach the protective cap when not in use.

• ALWAYS keep the instrument free of dust and liquids.

• Check the battery regularly to avoid deterioration.

• ALWAYS remove the battery when storing the instrument.

• DO NOT attempt to change any part of the unit.

• DO NOT disassemble the instrument. This will void the warranty.

• Store the instrument in a dry location.

• After measurement, clean the probes and the case using a clean cloth.

1. Protective cap

2. Pins

3. Low Battery Indication

4. HOLD icon  

5. WOOD icon

6. BLDG icon

7. 8 calibration scales(A-H)

8. Temperature value

9. Moisture value

10. Low moisture light

11. Mid moisture light

12. High moisture light

13. Hold button & °C/°F 

      conversion button 

14. A-H option button      

15. Mode & ON/OFF Button

16. Battery Case (Back of Unit)

Test aid

Measurement holes

1

2

3

4

5

6

7

8
9

10

11

12

13

14

15

16

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