I'm a general contractor and I find myself occasionally having to test for moisture in a client's home. This is my second General Tool moisture meter. This model - the MMH800 - has more functions then my previous one including the ability to test for moisture as well as providing a temperature readout. The meter is a dual-function pin and pin-less model which allows testing without leaving holes in walls or woodwork.
I had the opportunity to be on a customer site with a mold remediation tech who was taking moisture readings to determine possible wet areas that might have been contributing to a mold issue. The tech didn't tell me the model he was using other than it was a professional -series, scan-only type and that it was very accurate with a good scan depth. When I compared my readings from the MMH800 with the tech's meter I found very little differences in the readings.
There is one inherent limiting factor with all pin meters and that is they only test to the depth of the pins, useful on drywall or wood but very limited on masonry and/or concrete. Concrete testing is virtually unreliable due to the penetration issue. The ability to take a scan reading alleviates some of that issue.
What I like most about the MMH800 is that is reasonably accurate and affordable. Adding a moisture meter (along with a good gas sniffer) to my tool bag provides data which ultimately allows me to better serve my customers.
| Manufacturer | General Tools |
|---|---|
| Part Number | MMH800 |
| Item Weight | 2 pounds |
| Product Dimensions | 3.63 x 8.13 x 12 inches |
| Item model number | MMH800 |
| Is Discontinued By Manufacturer | No |
| Size | Pin Type or Pinless |
| Style | Pin Type or Pinless |
| Material | HAWA |
| Pattern | Digital Moisture Meter |
| Power Source | Corded-electric |
| Voltage | 9 Volts |
| Item Package Quantity | 1 |
| Number Of Pieces | 5 |
| Measurement Accuracy | +/-0.1% |
| Mounting Type | Surface Mount |
| Included Components | General Tools MMH800 4-In-1 Combo Moisture Meter, Batteries |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Warranty Description | 1 year parts |
