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Language: English Indonesia |
| KS-D1 Delmhorst Digital Soil Moisture Meter, Takemura DM-15 pH Moisture Meter, | |||||
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The Delmhorst soil moisture measuring system consists of two parts: the gympsum soil blocks (sensors) and the measuring instrument, Model KS-D1 moisture tester. The blocks are made of gypsum cast around two concentric electrodes. The gypsum acts as a butter against the effect that the salts might have on the electrical conductivity and the concentric electrodes continue the flow or current to the interior of the block, eliminating the effect of soil conductivity.
When a block is buried in the soil it absorbs moisture from the soil or releases moisture into the soil, until its moisture content approcahes equilibruim with the moisture content of the soil. When the block is connected to the meter, current flows between the electrodes and the electrical resistance of the gypsum is measured. Such readings are an indication of the moisture available to the plants. For irrigation purposes, the water of importance is that amount which can be extracted from the soil by the roots of the plants, and not the percent moisture content (which ir related to the weight of the soil). We refer to this reservoir of moisture as "available moisture". Each soil has a different capacity to hold water, depending on its structure and texture. The maximum amount of water availbale to the olants (called Field Capacity) is the amount held by the soil against drainage by gravity. When virtually all available water has been used (that is when no further moisture can be extracted by the plant) soil moisture has reached the level known as the "Permanent Witting Point". With soil moisture at this level, plants permanently witt and die. Finely textureds soils such as fine sandy loams and clay loams hold a greater amount of water at field capacity then coarsely textured soils such as coarse sandy loams. CARE FOR YOUR SOIL MOISTURE METER to keep your soil moisture meter in good working order Store your meter in a clean, dry place. The protective carrying case is an ideal storage place when the meter is not in use. Change the 9-Volt battery as needed. Continued use with a low baterry may cause the meter to go out of calibration. Clean the meter with any biodegradable cleaner. Use the cleaner sparingly and on external parts only. Remove the battery if the meter will not be used for one month or longer. The KS-D1 Digital Soil Moisture Tester, used with the GB-1 Gypsum Soil Blocks, make up a valuable system to monitor the soil moisture available to the plants. This system eliminates guesswork so that irrigation can be effectively scheduled according to plants' requirements. The KS-D1, housed in a rugged ABS plastic case, features reliable temperature stable semi-conductor technology with internal battery and calibration checks for users' full confidence. A membrane switch panel provides positive, tactile feel. Spring-loaded binding posts allow for positive contact with the blocks' leads. Advantages: The importance of water to plant growth is well known. Also, effective irrigation should be properly controlled in quantity and timing. Continuous and appropriate use of soil moisture testing devices can effectively aid in obtaining maximum crop yield at optimum quality levels and conserve water. Eliminate: Under-irrigation – thus preventing wilting, and making fertilizer application more efficient. Over-irrigation – with remarkable savings in power, labor, and water. Prevent: Soil spoilage due to excessive water and poor drainage. Realize: Bigger and better crops at lower cost. Specifications: Range: 0.1 to 15 Bars Tension Display: 3 1/2 “ Digital LCD with 0-100 Arbitrary Scale Size: 2 3/4” x 4 3/4” x 1 3/4”” Weight: 8 oz. Battery: 1-9V Carrying Case: included
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