General Tools Dual Pin/Pinless Moisture Meter with 2 in. D
General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. The MMD900 is designed for use in woodworking, water damage restoration, building construction and home renovation. The meter senses the moisture level of a material using either of 2 techniques: (1) inferring the material electrical conductivity from the current flow induced between a pair of steel pins placed on or into the material. The wetter a material, the higher its conductivity. The MMD900 is equipped with 2 pairs of test pin 1 pair on the top of the instrument and the other at the end of a cable and remote probe that can fit in tighter spaces. (2) Measuring the change in the material’s capacitance produced by the slight spreading of a local electric field generated by the meter. When the meter is powered on, 2 plates inside the back of the MMD900’s housing are charged with opposite polarity and pulsed at a high frequency. This causes current to flow, creating a 3-dimensional electromagnetic wave at radio frequency that extends about 2 in. (50 mm) perpendicular to the meter. When the back of the meter is placed against a wet material, the increased capacitance of the material distorts the wave’s electric field to an extent that can be measured. The distortion called the fringing field effect is proportional to the material’s moisture level.Info & Guides
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- Electrical Tool Accessory
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EXPRESS DELIVERY FROM STORE:
Express Delivery from Store is available for items currently in stock at a The Home Depot store within a delivery ZIP code. A driver from a local store will deliver the item(s).
Outside Delivery: Service includes delivery to area outside the house which is accessible by delivery equipment.
Threshold Delivery: Service includes delivery across your first doorway or threshold (ie. garage, backyard, deck, first room of the home).
This item cannot be shipped to the following state(s): AK,GU,HI,PR,VI