1 Blumat Digital Moisture Meter in a clear tube

Precise instructions and number readings that apply for different seasons and different kinds of plants.

Dimensions: 9.25 x 1.75 x 1.75 inches

Ceramic Tip Length: 3 inches

Battery Type: CR2032 (3V)

Warranty: 3 Years

1. Soak bottom green portion and ceramic carrot in water for at least 15 minutes.

2. Fill carrot with water and attach to digital display head.

3. Hold "On" button for several seconds until "000" or "---" is displayed.

4. Insert bottom portion of meter into soil/growing media and wait 45 minutes.

5. Press "On" button until a reading is displayed.

Over time, the meter will begin displaying inaccurate readings.  This will be fairly obvious.  In soil that seems healthy, you might get readings of several hundred mbar.  Don’t be alarmed!  The meter has probably voided of water.

Recalibration procedure:

1. Unscrew the digital display from the ceramic cone.

2. Soak the ceramic cone in water for 15 minutes.

3. Remove cone from water while keeping the cone full of water.

4. Hold the on-button for 3 seconds until “000” is displayed.

5. Screw the digital display back onto the cone.

6. Insert meter into growing medium.  Wait 20-45 minutes.

7. Push on button, and observe the digital display.

Changing the Battery:

1. Using a small Phillips head screwdriver you can unscrew the two plastic halves.

2. Replace the old battery with a new battery (3v CR2032)

Wait until after watering media to let the moisture evenly disperse and stabilize before trusting readings from the meter.

Aim for 100mbar on average in living soil.  Some gardeners report best results at 40mbar–I personally get overwatering symptoms there.  Let mbar readings on your meter be a guide to plant health, not a tyranny that rules your mental peace.

The meter cannot be used in extremely airy or chunky media such as chunky perlite, lava rock, etc.  When the ceramic is in contact with air, the pressure readings will be extremely high.  However, your plant roots may have access to moisture in these media even when the meter is displaying high readings.

Avoid getting the digital display wet.  The silicone cap is highly encouraged in all circumstances, and is completely necessary for outdoor growers as well as those who supplement with any over-the-top watering.

Do not drop or otherwise rattle the display.

Keep the digital display in dry storage when it’s not in use.

If the meter is not performing as it should, and you’ve attempted the re-calibration procedure recommended above, you can also try to reposition the meter in the soil.