In this review, our test results focused on the pin-less operation of this dual mode wood moisture meter.
To see the test results for this meter’s pin-style mode, see the separate CMT-908 pin-style review.
While there is much to like about this meter, one should be aware that it is not as accurate as some meters in its price range. In addition, it lacks features one might expect, such as a data HOLD function and ergonomic design.
The Electrophysics CMT-908 is not recommended due to accuracy-related issues above 17% MC along with the difficulty of replacing broken pins when using the pin mode.
Although the accuracy of measurements at a high moisture content is not as critical as accuracy at lower MC, this meter is hard to justify. Our testing indicated that better meters are available in this price range.
Pros
- Solid construction, built to last
- Easy-to-read digital display
- Dual-mode design (both pin-less and pin-style)
Cons
- Lacks ergonomic design
- Reduced accuracy above 17% MC
- Replacement of broken pins (in pin mode) requires a nonstandard type of screwdriver
Electrophysics CMT-908 Moisture Meter Review (Pin-mode)
Before you buy, learn how this meter performed in pin mode.
Objective Evaluation – Overall Score 2.9 out of 5.0
Accuracy – 4.2 out of 5.0
This meter provided reasonably accurate readings up to about 17% MC when compared to ASTM D4442 oven dry standards. Above 17% MC, this meter’s accuracy is questionable due to significantly high readings.
Learn about our accuracy test procedures
Surface Moisture – 1.0 out of 5.0
Surface moisture caused this meter to post readings about 16% higher than the baseline. These surface moisture results indicate that operating this meter in high humidity environments where condensation may form on the surface could lead to questionable readings.
Learn about our surface moisture test procedures
Meter Temperature – 1.3 out of 5.0
Meter temperature had a significant effect on this meter’s MC readings.
A low meter temperature of 34.8° F in the presence of low MC decreased the reading by 1%, while in the presence of high MC, the reading decreased by 2% compared to the room temperature reading.
A high meter temperature of 110° F in the presence of high MC, increased the reading by about 2% MC, while in the presence of high MC, the reading decreased by 2% compared to the room temperature reading.
Learn about our meter temperature test procedures
Wood Temperature – 3.7 out of 5.0
Wood temperature affected this meter’s readings, at least for wood samples with high MC.
A low wood temperature of 33.6° F in the presence of high MC showed a 10% decrease in the reading when compared to the room temperature reading. In the presence of low MC, the reading did not change appreciably.
Similarly, a high wood temperature of 110° F in the presence of high MC showed a 10% decrease in the reading when compared to the room temperature reading. In the presence of low MC, the reading did not change appreciably.
Learn about our wood temperature test procedures
Reading Repeatability – 5.0 out of 5.0
The readings of this meter were repeatable, showing no tendency to vary.
Learn about our repeatability testing procedures
Drift – 5.0 out of 5.0
Readings for this meter showed no tendency to drift after 3 seconds.
Cable Interference – N/A
This meter does not offer cabled accessories so the cable interference test could not be conducted.
Learn about our cable interference and drift testing procedures
Subjective Evaluation – Overall Score 3.5 out of 5.0
Ease of Use – 2.8 out of 5.0
The CMT-908 is relatively easy to operate with two-button operation. The meter is not entirely intuitive such that it is necessary to consult the manual. Operating instructions in the manual are adequate and include the necessary species and temperature correction tables. Replacement of broken pins can be a challenge, requiring a non-standard type of screwdriver.
Quality – 3.7 out of 5.0
The meter’s casing is extremely solid and suggests quality, durable construction. From all appearances, this meter is built to last. No carrying case is provided.
Comfort – 3.0 out of 5.0
This meter has a large, box-like design that is not as comfortable to hold or as easy to transport as some of the other meters we tested. Its digital display is extremely easy to read.
Versatility – 3.0 out of 5.0
The CMT-908 is dual mode (both pin-less and pin-style), which makes it useful for a variety of applications. When using as a pin-style meter, the display is viewed upside down. The meter adjusts the moisture reading according to the wood density entered for a particular species or species group.
Range – 5.0 out of 5.0
The meter is rated for measurements for a full range of moisture content levels down to 4% MC according to the manual. In practice, our tests indicated that readings at higher MC levels (above about 17% MC) are not as accurate and tend to read high.
Features – 2.5 out of 5.0
Readings precise to the nearest 1%. Offers an easy calibration check function. No data HOLD function for use in tight spaces where the display cannot be easily viewed. Includes low battery indicator (flashing LCD display).
Customer Service – 4.5 out of 5
Electrophysics offers a two-year warranty for the CMT-908. Service by telephone and email is fast and friendly. A service center for warranty issues and other repairs is available in Ontario, Canada.
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.