Lignomat moisture meters have proven measuring technology which guarantees long-term accuracy. Family owned and operated for over 40 years. 

Thermo-Hygrometer PN

PN Hygrometer has wider humidity range and shorter response time.

Thermo-Hygrometer PN indicates:
– relative humidity,
– ambient temperature


Controlled ambient conditions
protect wood products
from shrinking and cupping.

Other Info:

Special Prices
thru April 15, 2022.
Now is a good time to buy!

Thermo-Hygrometer PN

“Air humidity” affects wood. As RH goes up, wood absorbs moisture and swells. As RH goes down, wood looses moisture and shrinks. Once wood has reached its equilibrium moisture content (EMC), it will be stable and neither absorb nor loose moisture.

“Air humidity” affects our environment and our health. Mold is the dreaded word. Mold destroys materials and makes humans sick. Mold growth can be prevented, if relative humidity stays within a safe range.

Hygrometer PN is for high and low relative humidity and on-the-job fast readings. Pen shape allows measuring hard to reach areas.

Hygrometer PN is the right choice for cold climate zones, where relative humidity drops as low as 5% in the winter.  It is also recommended for inspection, remediation and restoration applications, where high relative humidity has to be checked closely to prevent mold growth.

Recommended and comfortable live-in conditions are about 70°F (20°C) and 35-50% relative humidity. If those conditions are maintained, wood will stabilize at 6-8% moisture.

See Equilibrium Moisture Content table.
Learn more about Moisture Problems and Helpful Hints.


  • Thermo-Hygrometer RH-B: range 1-99%, with fast, precision RH Probe.
  • Keep records with on-site Data-Logger BL2 with precision RH Probe.
  • Wireless transmitters for relative humidity and wood moisture.
  • Wood moisture meter mini-Ligno MD: great price – good quality.
Moisture Meters Item List $ Package $
Thermo-Hygrometer TH TH 47.00
Thermo-Hygrometer PN PN 74.00
Thermo-Hygrometer RH-B:
1 Ligno-Tec RH meter, 1 Adapter RH,
fast, precision RH BluePeg Probe
RH-B 378.00 359.00
Data-Logger BL2
Memo-Chip BL2, cable, RH Probe
BL-2 187.00 162.00

Ask for a quote, if you are interested in wireless transmitters.
* If you buy a Thermo-Hygrometer and a pin or pinless meter together, you get the Special Thermometer Price and an extra 5% discount for the moisture meter.

RH Measurements 5%-95%
Temperature Measurements -4°F to 122°F and -20°C to 50°C
Accuracy ±5% for 5-95% RH
Warranty Thermo-Hygrometer PN has a 1 year warranty, battery excluded.