Moisture meters for on-site diagnosis
Moisture content and capacitance The capative method allows measuring both the moisture content and the temperature of the measured sample, from the frequency variation in response to the electric signal sent by the moisture meter: the modifications of the electric field caused by material, moisture and temperature bring the pieces of information needed to measure the sample.
The calibration curves take the density of the sample standards into account, and their accurate weighing is a prerequisite for a reliable moisture measurement.
Some material or biomass moisture meters use this principle to measure the moisture content on wet weight and temperature.
Measuring moisture and resistance The water in a material conditions its resistivity. The more there is water, the more the material drives the current. The material moisture content is determined by measuring the resistance between two electrodes: the material water content is proportional to conductance and inversely proportional to resistance.
To measure the material water content, plant a moisture probe with two electrodes pins or rings in the material; thus, the current passes and the moisture meter measures the resistance of the material.
For packed in the bulk matters or materials in bales or piles as well as stored in bags, some moisture testers Humitest allow to measure matter water content at the core of the bale, pile or bag.
Radio frequency moisture detection
The damper the material is, the stronger the signal sent to the receiver
of the moisture detector; thus the sub-surface moisture of solid
non-conducting materials is detected. This technique is ideal for
fragile or easily breakable surfaces, such as wall papers, tiled floors,
floorboards or boat hulls.
Some Humitest moisture testers detect moisture at depth by this RF method. The measurement is shown on a digital display synchronised with a colour coded LCD scale.
With its hammer probe or special probes, this moisture meter allows to measure water content of round wood, split logs, wood chips, sawdust, pellets, hay, straw and cellulose bales.
Four-in-one system: two-pin-contact moisture meter, in depth radiofrequency moisture detector, infrared thermometer, fast responding thermo-hygrometer.
- intuitive user interface with color screen,
- data logging,
- firmware upgradable,
- psychometric calculations,
- non-contact IR temperature probe with laser pointer.
"testing moisture in a mixture of raw materials"
"Tracing the origin of a disaster"
"pinpoint any water leakage"
"...optimal moisture to insure the quality of our seeds"
Thermal efficiency and dryness
The thermal performance of a wall depends on its dryness. Before installing an insulation system, wall dampness is to be removed.