Browse Categories

Tramex MRH III Moisture and Humidity Meter

Product Options


The Tramex MRH3 Moisture and Humidity Meter is a hand-held digital moisture meter calibrated for most building materials. It also attaches to an optional plug-in Tramex Hygro-i® relative humidity probe and heavy-duty pin type electrodes. Suitable for many industries including Home Inspection, Water Damage 
Restoration, Flooring, Indoor Air Quality, Home Inspection and Pest Control.

**Includes 2 free microwave testers!**


  • Digital, non-destructive moisture meter.
  • Optional plug-in wood probe.
  • Optional plug-in Tramex Hygro-i ® relative humidity probe for relative humidity, temperature, dew point and mixing ratio readings.
  • Deep signal penetration to over 1" into the materials being tested without the need to damage the surface. Signal penetration depends on material being tested and meter setting.
  • Specific gravity adjustment for most wood species. 
  • External Rubber electrodes make direct contact with the material being tested for best sensitivity and repeatability.  
  • Wide range of readings for wood of 5% to 30% and 0 to 100 comparative for all other materials.
  • Backlit, large, clear, easy to read LCD display.  
  • “Hold” function enables user to "freeze" the reading. Useful for taking readings when the meter face is not visible.
  • Switchable "On" or "Off" audio warning tone.    
  • Automatic power cutoff switches "Off" when not in use.
  • Automatic default to last user setting when switched back on.
  • Battery operated (included).


Industry: Water Restoration, Indoor Air Quality, Pest Control, Home Inspection, Surveying, Flooring, Residential Roofing.

Material: Drywall, wood, plaster, brick, ceramic, porcelain tiles, resilient flooring, laminates, asphalt composition shingles and most building materials.

Technical Data

Weight: 8.47oz (240g)

Size: 6" x 3.5" x 1.5" (150mm x 85mm x 38mm)

Construction: ABS Body

Power: 9 Volt PP3 Battery

Display: Digital / BACKLIT

Depth of penetration: up to 1 ¼ " ( 30 mm ) (in wood and drywall)

Measuring Range

Reference Scale for Building Materials: 0 to 100

Wood Non-Invasive Mode: 5 to 55% ( at S.G of 0.3 )

Wood Invasive Mode: 7 to 40% using optional pin type wood probe

Relative Humidity: 0 to 99% using optional Hygro-i ® RH probe

Click here to download the Tramex MRH III Data Sheet


All Tramex products carry a full satisfaction guarantee including a one year warranty against defects in parts & workmanship and a refund if the unit is returned, shipping pre-paid, in new condition within 21 days of original delivery. Proof of purchase is necessary.