RDM-3 wood moisture meter - Woodworking

Moisture meter

RDM-3 wood moisture meter - Woodworking

Wood, timber, lumber, hardwood, softwood, floorings, veneer

5-60% on wood

Wood species

The RDM-3 is a handheld "easy to operate" wood moisture meter with rubber grip handle, packed with smart features.
The Delmhorst RDM-3 moisture tester is an accurate and reliable tool for the lumber and woodworking industries.

Your Benefits:
  • Bright, clear digital display
  • 5%-60% wood scale
  • 0.1% MC resolution
  • Corrects for 69 individual wood species and temperature
  • Integral contact pins mounted on top of meter provide 8mm (5∕16”) penetration
  • Built-in connector accepts any Delmhorst electrode
  • Audible, adjustable alarm alerts you when your pre-selected MC has been reached
  • Auto-shutoff timer saves battery life
  • Store up to 1400 readings with date and time stamp
  • View stored readings on screen
  • Organize readings by job for easy reference
  • Optional software lets you download readings to your computer and generate Excel reports
  • Operating Temperature: from -20°C to +70°C
  • Size: 22x9x4,5cm (8½”x3⅜”x1¾”)
  • Weight: 312 gr. (11 oz.)
  • Rugged construction ensures years of reliable use
  • Sturdy plastic carrying case
  • 9V battery
  • 1-year warranty

Special Packages:

Moisture meter package RDM3/FD/PKG:
Includes multilingual meter, 26-ES electrode, extra contact pins for the meter, extra # 496 pins for 26-ES hammer electrode and carrying case deluxe

Moisture meter package RDM3/FD/PLUS:
Includes multilingual meter, 26-ES electrode, extra contact pins for the meter, extra # 496 pins for 26-ES hammer electrode, PLUS the PC/KIT software application program. This is the most complete package available and enables you to download stored readings via I/R to a PC or laptop
RDM-3 wood moisture meter - Woodworking 

26-ES Wood hammer
Hammer electrode. The 496 contact pins that come with the 26-ES penetrate 29mm (1⅛”) and have insulated shanks so that only the tips are exposed. The pins make contact only at their uncoated tips and provide much more accurate readings of moisture content at various levels of penetration.
Also available as the 26-ED, which includes gauge to measure pin penetration depth.

This hammer electrode will easily check high density hardwood that short pins are unable to penetrate. It will also easily penetrate through flooring to plywood sub-floor or concrete.

2-E Wood
Fitted with the same 8mm (5/16") penetration pins that are mounted on our pin type meters

Electrode great for hard to read areas, and to minimize stress placed on the meter casing
Use on timber, poles and veneer
15-E Wood
Pin type, with two rows of four pins each, maximum penetration 3mm (⅛"). Penetration can be adjusted according to stock thickness by means of gauge block

Used for veneer
Pin type, comes with A-111 uninsulated contact pins for 38mm (1½") penetration.
Will also accept 496, insulated pins, 29mm (1⅛”) penetration

For use on plaster, masonry and wood
Pin type, comes with 4 uninsulated 2497/A-100 contact pins for 8mm (5/16") penetration

Use on kiln-dried boards up to 5cm (2") and on air-dried boards up to 32mm (5/4")
RDM-3 wood moisture meter - Woodworking

Moisture content standards are great for verifying that your Delmhorst moisture meter is in calibration. The MCS-1 can be used on any meter with a wood scale. With two electrical resistance values (12% and 22%) to test your meter against, you can be sure that your readings will stand up to the strictest standards of accuracy.
Enables you to download stored readings from the meter to a PC via infrared linking. This software will enable you to:

  • Export job data to Excel
  • Customize printing options
  • View readings and stats in the application program
  • Save and print individual or group job readings
  • Customize job title
  • View data in Celsius or Fahrenheit
  • Append notes to each job
  • Generate graphical histogram
All these features are provided in a easy to use GUI interface, and are compatible with Windows 95/98/ME/2000/XP/Vista/7.

The PC/KIT is included in several of our moisture meter packages, or may be ordered separately. It can be used with the  Navigator Pro, RDM-3, RDM-3P, and Total Check moisture meters.

Uninsulated pin and retainer with 8mm (5/16") penetration.
Standard on all meters with built-in pins and the 2-E and 4-E electrodes.

Used on wood up to 38mm (1 ½”), concrete and gypsum.
496 contact pins are insulated except at the tips, and measure 5cm (2") overall with 29mm (1 1/8") penetration.
Standard on the 26-ES.

Used to check wood up to 13cm.
An alternate to the 496 pin for the 26-ES, the 1849 is a 38mm (1½”) insulated pin with 13mm (1/2") penetration.

The 1849 is suitable for wood up to 5cm (2") thick.
Another alternative to the 496, the A-111 is an uninsulated contact pin measures 36mm (1 7/16”) and has 1,3cm (1/2") penetration.
The A-111 is compatible with both the 26-ES and the 22-E, and its tapered point makes it easier to penetrate into hard surfaces.

Can be used on wood up to 5cm (2") thick.
Retainer used to hold contact pins in place.

Used with # 496, # 1849, and # A-111 pins.

Retainer used to hold contact pins in place.

Used with pin #608 and pin #608/001.

RDM-3 wood moisture meter - Woodworking

Downloads & Videos
Manual:Download pdf
Brochure:Download pdf

RDM-3 wood moisture meter - Woodworking

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Product group Wood

RDM-3 wood moisture meter - Woodworking

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RDM-3 wood moisture meter - Woodworking


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