Package RH-B


Using the Ligno-Tec RH as thermo-hygrometer in wood production plants, during flooring installations, inspections and water damage repair, for all applications where relative humidity is an important factor influencing moisture in wood, building materials and the entire building envelope. Measures RH, Temp, DewT, GPP: relative humidity, temperature, dew point temperature, grains per pound.


Lignomat’s RH BluePeg probe is an accurate RH probe with a short response time. The probe can be connected with a cable for remote readings or extended with the depth adapters DA to reach into small openings. In addition, accessories are available for the Ligno-Tec RH meter and RH BluePeg probe to perform in-situ RH concrete moisture testing in compliance with ASTM F2170.

If you are looking for a combination meter to measure relative humidity and wood and concrete moisture, we suggest the package with
– Ligno-DuoTec BW pinless and RH: (BW-B)
– Ligno-VersaTec pin, pinless, RH: (V-B) 

Item Number: RH-B


999 in stock

Product Description

RH-B is an accurate, fast-responding thermo-hygrometer, which indicates
– relative humidity RH
– ambient temperature Temp
– dew point temperature DewT
– grains per pound GPP

The package RH-B consists of:

Click here for details.

Ambient conditions, especially if it is too moist or too dry affect wood and other materials in the building envelope. The two variables humidity and moisture are set into a relationship with each other in the EMC table, which shows values for stable conditions of wood moisture and relative humidity. The table can be used for materials other than wood, when the wood moisture equivalent is known.

If you are looking for a hi-accuracy Thermo- Hygrometer with a short response time, the Ligno-Tec should be your choice. The RH probe is detachable. For extended reach, the probe can be connected with a stereo cable up to 50ft long. The Ligno-Tec RH meter, reusable RH BluePeg Probes, sleeves and cable are designed to comply with latest ASTM F2170 standard for a simple and fail-proof concrete moisture testing procedure.

RH Measurement:  The Ligno-Tec RH has a 35mm stereo jack mounted in the top of the meter to connect the RH BluePeg probe to the Ligno-Tec RH. First plug the Adapter H into the connector at the top, then the RH BluePeg probe fits into the Adapter RH.

As soon as the connection is established, the Ligno-Tec RH automatically switches into RH mode. When the READ button is depressed, the meter immediately indicates the relative humidity. The up or down keys allow recalling the values for ambient Temperature, Dew Point Temperature and Grains Per Pound. The display indicates the measured values and the RH Probe number. The RH probe number is an individual number between 1-999 to allow keeping track of probe measurements and performance.

RH Adapters and Cables
The Adapter comes with 3.5mm stereo plugs (male) on both ends to connect Lignomat’s RH BluePeg Probe directly to the Ligno-DuoTec BW. A RH cable 6 ft for remote measurements is included with the package BW-B. The cable is used when the probe at the meter cannot reach the area or when the display cannot be seen, while measuring a tight spot. Upon request we make longer RH cables.

The distance from the top of the meter to the end of the probe is 2.25″ including the RH adapter. If that is too short to reach into heat ducts, walls, tight openings, and other small crevices, the shaft of the probe can be extended with the RH depth adapter.

Specifications RH BluePeg Probe – accurate and fast responding
RH: ±2% (10-90%), ±3% below 10%, above 90%
T: ±0.5°F (32-120°F) , ±1°F (5-32°F and 120-160°F) Response time 8 sec.
Resolution for RH and T: 0.1% and 0.1°

Note: Off-the-shelf thermo-hygrometers usually come with an accuracy rating of  ±5% for relative humidity and  ±2°F for temperature.


Choose package BW-B with Ligno-DuoTec BW, if you are looking for a pinless – RH meter.
Choose package V-B with Ligno-VersaTec, if you are looking for a pin – pinless – RH meter.

Add sleeves and RH-CC cable for RH in-situ moisture testing of concrete slabs. System complies to ASTM F2170. Package RH-KS

More info on in-situ probe testing
More info on Lignomat’s RH in-situ probes

For more information please contact Customer Service at 1-800-227-2105.

Lignomat USA Ltd, 14345 NE Morris Ct., Portland OR 97230, USA,

Package Includes

Ligno-Tec RH

RH mode. Meter comes with a connector for Lignomat’s RH probe.

Manual, battery and a pouch with belt loop.

The Ligno-Tec RH is used to measure ambient conditions: RH, Temp, DT, GGP. Accessories are available for in-situ RH concrete testing.

RH BluePeg Probe

RH Thermo-Hygro Probe consists of one RH BluePeg Probe and the RH Adapter ready to be connected to the RH meter or data logger using the easy-connect 3.5mm stereo plug.

RH adapter can be replaced by RH-C cable (6 ft) for remote measurements

RH Cable

Cable is used to connect RH BluePeg probe to a RH moisture meter or data logger for remote measurements. Ideal for monitoring hard to reach places where moisture may be trapped.


Pouch comes with a strap.
Fits Ligno-Tec RH and RH Accessories.