Electrical Resistance Moisture Meter

The block is buried in the soil and lead wires connected to the block are brought above ground level.

Electrical resistance moisture meter. The electrical resistance method uses a small block that changes resistance as soil moisture changes. Depending on the type and manufacturer of the meter the electrical property measured may be resistance conductance dielectric constant or power loss factor. When the meter is connected to the wire leads block resistance is read. To put it simply the higher the electrical resistance is in a piece of wood the less moisture there is in that piece of wood.

Electromagnetic field technology emf or pinless meters often called a pinless meter this type measures the moisture content of wood without piercing the wood with pins. Thus it is quite valid to use electrical moisture meters to look at damp salt problems. The two major classes of electric moisture meters are the conductance resistance type and the dielectric type. This process measures the resistance to the current between pins and correlates that resistance to wood moisture content.

Conductance t ype meters use. An electric current is passed between the electrodes and the amount of charge that gets through is measured. It has two pins or electrodes which are hammered or pushed into the timber. The reading is related to.

An electrical resistance moisture meter is mostly used for measuring timber moisture content. One generates an electrical current and the other records how much resistance there is to the electrical current which is measured in ohms. Electric moisture meters for wood measure electric conductance resistance or dielectric properties which vary fairly consistently with moisture content when it is less than 30 percent. Wood technology research drottning kristinas väg 67 box 5609 11486 stockholm sweden abstract for the improval of the accuracy of resistance type moisture meters for wood the relationship between moisture content and electrical resistance is important.

Moisture meters anders samuelsson swedish institutet. Most building materials brick mortar plasters render are free from materials which affect electrical resistance. The pins in a pin meter operate as electrodes.