The Surveymaster SM Moisture Meter uses two independent sensors to monitor sub-surface moisture conditions in wood, concrete, ceramic tile and other non-conductive material. One sensor uses radio waves to detect moisture presence, while the other uses moisture-sensitive needles. For items with delicate surfaces, such as fine woods, use the radio wave sensor which captures moisture readings without piercing the surface. Results from the meter’s non-invasive reader are shown on the LED and LCD displays. For more precise readings ranging from 6% to 60%, simply insert the meter’s steel needles into an item’s surface. Results appear in the meter’s LCD window. As when using the radio wave sensor, LED’s along the meter’s color scale indicate safe (green), borderline (yellow), and damp (red) moisture conditions. To speed up investigations over large areas, start by using the radio wave sensor to quickly locate problem spots and then insert the meter’s needle sensor to acquire exact moisture percentages. Features include adjustable auto time-out, splash-resistant keypad with large “glove-friendly” buttons, weather-resistant seals, and rugged ABS plastic housing with rubber grips. A pair of deep wall probes, two spare needles, extension probe, user’s guide, and padded carrying case are included. Two year warranty from the manufacturer.
Moisture level range: Invasive, 7% to 99.9%; Non-Invasive, 0 to 999 relative scale*. Moisture level accuracy: ±1%*. Power: one 9V battery (included).
*Assumes surface being tested is equivalent to wood.