Delmhorst G-79 Gypsum Moisture Meter

See More Moisture Meters for Drywalls

Delmhorst G-79 Gypsum Moisture Meter

See More Moisture Meters for Drywalls
This product has been discontinued

Product Description
This product has been replaced by the BDX-30
Delmhorst G-79 Gypsum Moisture Meter
Easy-to-read analog display
Measures moisture in gypsum using a three-range scale: (0.2%-1%, 1%-8%, and 8%-50%)
Built-in battery and calibration check

The Delmhorst G-79 Gypsum Moisture Meter was designed specifically to read a wide range of moisture on gypsum. One of our first meters to feature our exclusive gypsum scale, the G-79 is still a favorite for its large analog display and classic design.


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Kit Contents
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  • Delmhorst G-79 Gypsum Moisture Meter
  • Instructions


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Features
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  • Easy-to-read analog display.
  • Measures moisture in gypsum using a three-range scale: (0.2%-1%, 1%-8%, and 8%-50%).
  • Built-in battery and calibration check.
  • Auto-shutoff timer saves battery life.
  • Size: 7 3/8” x 3 7/8” x 2 3/4”.
  • Weight: 1 lb.
  • Rugged construction ensures years of reliable use.
  • Sturdy plastic carrying case.
  • 9V battery.
  • 1-year warranty.


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Accessories & Electrodes
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2497/A-100

  • Uninsulated pin and retainer with 5/16" penetration. Standard on all meters with built-in pins and the 2-E and 4-E electrodes. Used on wood up to 6/4 (1 ½”), concrete and gypsum
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496
496 contact pins are insulated except at the tips, and measure 2" overall with 1 1/8" penetration. Standard on the 26-ES, and can be used to check wood up to 5" thick

  • 496/24
  • 496/100
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26-ES
The 496 contact pins that come with the 26-ES penetrate 1 1/8” 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. This feature is useful for a variety of different applications

  • Flooring installers: Penetrate through flooring to plywood sub-floor, or concrete.
  • Dry kiln operators: Identify moisture gradients which helps to identify the drying pattern.
  • Furniture manufacturers and craftsmen: Easily check high density hardwood that short pins are unable to penetrate

Also available as the 26-ED, which includes gauge to measure pin penetration depth

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2-E
Fitted with the same 5/16" penetration pins that are mounted on our pin type meters. This electrode is great for a variety of different applications:

  • Home inspector: Use on wood joists and drywall.
  • Paper producer: Use on curved surfaces such as cardboard and paper tubes.
  • Woodworker: Use on timber, poles, and veneer.

2-E is also available as the 2- ET with a tapped handle for hard to reach areas. Can also be fitted with A-103 uninsulated pins with 1 3/32” length and 11/16” penetration.

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Downloads
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Delmhorst G-79 Moisture Meters - Instruction Manual
Delmhorst Accessories & Electrodes - Catalog Online


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Why should i use a Moisture Meter?

Home Inspectors, Pest Control Operators and EIFS inspectors know that Moisture intrusion is the single most important factor affecting the integrity of building structures. Delmhorst Instrument Company offers Moisture Meter packages specifically manufactured to meet the needs of inspectors. Proper use of a Moisture Meter allows the inspector to easily identify the source of Moisture and to locate areas in the building that have been affected by moisture.

How does a Moisture Meter work?

There are two types of Moisture Meters typically used by the home inspector. Pin-type Meters, which utilize the principle of electrical resistance, use wood or other hygroscopic materials as an element in a circuit by driving two pins or electrodes into it.

Pinless Meters use radio frequency signals to penetrate the material being tested. There is no pin intrusion into the surface of the material you are checking.

Can i use a Moisture Meter to check for pest infestation?

Yes -- a few Meter readings in key locations of the structure will quickly indicate if the areas are safe or in danger of infestation. We recommend using pin-type Meters for pest control applications as the best way to identify the exact point of infestation behind walls and ceilings. The key to finding hidden Moisture is to use an electrode with insulated contact pins. These pins read only at their un-insulated pin tips, allowing the contractor to drive the pins into material at different depths, noting readings at each level of penetration.

A pinless Meter is a good way to identify infested areas, as long as you do not have to penetrate into a hidden material.

At what level of Moisture does infestation or decay occur?

Wood technologists and pest control experts agree that most fungi need at least 20% MC. Readings higher then 20% is susceptible to mold growth and decay. Readings in the 17%-20% are borderline and normally require further testing. On the other hand infestation can occur at much lower levels, especially in humid conditions. Old House Borer and Powderpost Beetles can attack wood that falls in the 12-13% range.

Which type of Moisture Meter works best for EIFS?

To quickly identify wet areas, a pinless Meter is easy to use. Pinless Meters offer the convenience of testing a large area quickly, and help you determine if further testing is required in certain spots.

Pinless Meters read Moisture closest to the source of the magnetic field, in this case, at the surface. Most pin-less Meters read at a depth from 1/2" to 1". Moisture that resides in the substrate or insulation may go undetected without using a deep penetrating electrode. It is also important to remember that any metal or other conductive material behind the EIFS may give false readings.

A pin type Meter, on the other hand, is the best way to identify the exact location of Moisture in the substrate and framing. A pin-type uses two pins that penetrate into the building at the users desired depth. When insulated contact pins are used, only the uncoated tips are exposed to the wood fiber, providing an accurate reading of Moisture content at various levels of penetration. Pin-type Meters are the only instruments that allow the inspector to identify exact location of Moisture at a given point.

Many EIFS inspectors use both types of Meters. They can quickly identify problem areas using a pin-less Meter, and also use a pin-type Meter to identify exact location of Moisture in the wood substrate.

Where does most Moisture intrusion occur in eifs clad houses?

Most Moisture intrusion occurs around windows, doors and any flashing. In many cases the Moisture intrusion is directly related to poor installation practices.

How can i find Moisture in the substrate or frame of the house.

The most effective way to check for Moisture in the substrate or frame is to us our 21-E electrode with 6" penetration pins. This method allows you to locate Moisture behind the EIFS without it having to be torn away.

How Do I Keep a Delmhorst Meter in Good Working Condition?

Delmhorst Moisture Meters are well known for their ruggedness and ability to withstand years of rough handling. Like any testing instrument, a little care goes a long way toward trouble-free service:

  • Store the Meter in clean, dry place
  • Change batteries and pins as needed
  • Keep the Meter and electrode clean by using any biodegradable cleanser sparingly on external parts only.

If you have any doubt about the working condition of your Meter, send it to Delmhorst. We can repair and re-calibrate your instrument to its original standards and return it to you quickly.

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