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2. Moisture meter - Wikipedia

   en.wikipedia.org/wiki/Moisture_meter

   Moisture meters are measuring instruments used to measure the percentage of water in a given substance, as physical properties are strongly affected by moisture content and high moisture content for a period of time may progressively degrade a material. Meters exist for various substances, including wood, building materials, concrete, and soil.

3. Concrete moisture meter - Wikipedia

   en.wikipedia.org/wiki/Concrete_moisture_meter

   A concrete moisture meter is a type of moisture meter used by installers of flooring to measure the moisture levels of concrete. These meters have been used for decades to measure the moisture content in different materials and substances. Concrete meters have evolved from the successful wood moisture meter as flooring contractors tried to use ...

4. Neutron moisture gauge - Wikipedia

   en.wikipedia.org/wiki/Neutron_moisture_gauge

   A neutron moisture meter is a moisture meter utilizing neutron scattering.The meters are most frequently used to measure the water content in soil or rock. The technique is non-destructive, and is sensitive to moisture in the bulk of the target material, not just at the surface.

5. Soil moisture sensor - Wikipedia

   en.wikipedia.org/wiki/Soil_moisture_sensor

   A simple soil moisture sensor for gardeners. Soil moisture sensors measure the volumetric water content in soil. [1] Since the direct gravimetric measurement of free soil moisture requires removing, drying, and weighing of a sample, soil moisture sensors measure the volumetric water content indirectly by using some other property of the soil, such as electrical resistance, dielectric constant ...

6. Grounding resistance tester - Wikipedia

   en.wikipedia.org/wiki/Grounding_resistance_tester

   Most importantly, the range of resistance the device measures. Usually the range is three or four degrees. The soil moisture at which the appliance operates is another important parameter. If the instrument cannot operate at a certain humidity, then the measurement may differ significantly from the real value of soil resistance.

7. Water supply and sanitation in Bangladesh - Wikipedia

   en.wikipedia.org/wiki/Water_supply_and...

   Bangladesh has an enormous excess of surface water during the summer monsoon (June to October) and relative scarcity towards the end of the dry season in April and May. . Internal renewable water resources are about 105 km 3 per year, while inflowing transboundary rivers provide another 1,100 km 3 annually (average 1977–2001)