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Wagner MMC220 Moisture Meter

Our Score:

Wagner Meters MMC220 At a Glance

The TotalCheck is a dual-mode (both pin and pinless) meter that can be used for measuring moisture in wood and other building materials. Its versatility allows it to even be used for RH testing in concrete. Its rugged build should stand up well to a lot of use. It utilizes several navigation buttons that require some use of the manual to gain familiarity. Accuracy test results indicate that this meter has some limits, especially when MC falls below 8% MC.

The TotalCheck’s reasonable accuracy, except below 8% MC, its versatility, offering both pin and pinless modes, its many features, and its sturdy construction all make it a reasonable choice for many applications, especially where a pin-type meter is preferred.


  • Many features, including the ability to store up to 1400 readings.
  • Capable of being used with a variety of building materials.
  • Built-in calibration check, plus thermo-hygrometer with RH sensor.
  • Ergonomically designed with sturdy construction.


  • Issues with accuracy below 8%.
  • Pinless (or scan) mode gives relative readings only.
  • Tendency for readings to drift.


Objective Evaluation – Overall Score 4.3 out of 5.0

Delmhorst TotalCheck Objective Test Summary

Accuracy – 4.3 out of 5.0

This meter provided reasonable accuracy, especially in the mid-range from about 8% to 20% MC. Below about 8% MC, our testing found that the TotalCheck did not give reliable readings when compared to ASTM D4442 oven-dry standards. In addition, above 20% MC, there was a tendency for readings to be somewhat low for Ponderosa pine and somewhat high for Douglas fir samples, when compared to ASTM D4442 standards.

Delmhorst TotalCheck Accuracy Chart

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Surface Moisture – 5.0 out of 5.0

Surface moisture had little or no effect on this meter’s readings.

Delmhorst TotalCheck Surface Moisture Chart

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Meter Temperature Test – 5.0 out of 5.0

Meter temperature had a relatively minor effect on this meter’s readings at both low MC and high MC. For example, a high meter temperature of 110° F in the presence of high MC decreased the reading by about 0.8% MC compared to the room temperature reading. Similarly, a low meter temperature of 34.8° F in the presence of high MC increased the reading by about 1.2% MC.

Demlhorst TotalCheck Meter Temperature Effect on Meter Readings Chart

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Wood Temperature Test – 4.0 out of 5.0

Wood temperature affected this meter’s readings to some extent, especially at high MC. At a low wood temperature of 33.6° F in the presence of high MC, the reading changed about 1.5% MC when compared to the room temperature reading. At a high wood temperature of 110° F In the presence of high MC, the reading increased by about 2% MC.

Delmhorst TotalCheck Wood Temperature Effect on Meter Readings

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Reading Repeatability – 4.0 out of 5.0

The readings of this meter were not entirely repeatable, showing a minor tendency to vary.

Delmhorst TotalCheck Reading Repeatability

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Drift Test – 2.0 out of 5.0

Readings for this meter showed a tendency to drift by up to 1.0% MC after about 3 seconds.

Delmhorst TotalCheck Meter Reading Drift after 3 Seconds

Cable Interference – 5.0 out of 5.0

This meter’s readings were not affected at all by cable interference.

Delmhorst TotalCheck Effect of the Cable Interference on Meter Readings

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Subjective Evaluation – Overall Score 4.4 out of 5.0

Subjective test summary results for the Delmhorst TotalCheck moisture meter, earning a subjective score of 88%

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Ease of Use – 3.5 out of 5.0

This meter requires using the manual to become familiar with to operate it. The manual itself provides reasonable documentation for resolving issues while using the TotalCheck.

Quality – 4.3 out of 5.0

Sturdy, durable construction. The meter itself is unlikely to break or malfunction with normal use.

Comfort – 4.0 out of 5.0

With an ergonomically-designed shape, this meter fits nicely in one’s hand. It is not compact enough to fit easily into a shirt pocket, but it does come with a sturdy case to protect the meter when transporting it from one job site to the next.

Versatility – 5.0 out of 5.0

This is a dual-mode meter (both pin and pinless modes). Capable of giving relative readings in a variety of non-wood building materials.

Range – 5.0 out of 5.0

The TotalCheck reads from 5% to 60% MC. However, it is worth noting that measurements taken at lower moisture levels below about 8% MC tend not to be as accurate.

Features – 4.6 out of 5.0

The TotalCheck is a feature-rich meter. It is capable of storing up to 1400 readings with date and time stamp. It includes a built-in thermo-hygrometer with a relative humidity sensor, as well as a built-in calibration check and low battery indicator.

Customer Service – 4.5 out of 5.0

Delmhorst’s customer service was knowledgeable, helpful and polite. The representative was able to answer all the basic questions about repairs, returns, etc. Fast response to both telephone and email inquiries. Manual available online.


Warranty and Repair Information:

  • Three-year warranty on this Delmhorst meter, and a 90-day warranty for optional electrodes.
  • The meter must be physically inspected before the actual repair cost can be determined.
  • 3-5 business day turnaround on repairs.

Our review is based on Moisture Meter Experts independent evaluation of the meter, which was purchased by Moisture Meter Experts or provided free of charge by the manufacturer. By purchasing this meter through the links above, Moisture Meter Experts may be compensated either by your purchase directly from Moisture Meter Experts or from commissions from an affiliate. View our Review Procedures section to learn more about our proprietary evaluation procedure and expertise in the field of moisture meters.