Soil PH Meter PCE-228S

Soil pH Meter PCE-228S
Instrument Laboratorium

Deskripsi produk
DESCRIPTION
SOIL PH METER PCE-228S
Handheld instrument for soil and soil pH, redox and temperature / Large, easy-to-read display / SD card memory (1 ... 16 GB), stored data is saved as an Excel file / RS-232 interface and optional software for direct transfer to the PC
The soil pH meter PCE-228S is used to measure the soil pH value. The pH and temperature can be stored directly on the SD card. The special pH electrode of the pH meter PCE-228S is manufactured so that it is possible to measure with the pH meter in loosened soil. Temperature compensation is either manual or automatic via the supplied temperature sensor.

Please always make sure that the measuring principle requires a minimum residual moisture in the soil. Thus, this soil pH meter is the ideal solution for the accurate measurement of soil pH, in substrates, for horticultural irrigation solutions used in greenhouses and also in agricultural products and plants.

The meter is always factory calibrated. A continuous recalibration of the pH meter is carried out by means of the supplied calibration standards (buffer solutions). The calibration data remains stored when the battery is changed. In general, you can simply pierce the electrode into the ground and read the pH directly on the digital display. If you would like to carry out a measurement according to DIN or if you can not penetrate deep enough into the soil due to soil hardness, then you should prepare a DIN soil solution and use it for the exact measurement.
APPLICATION GARDENERS
Professional gardeners as well as environmentalists know how much depends on the condition of the soil. Depending on its composition it may be very fertile, or absolutely inappropriate for cultivation. pH level (acidity) of the soil, together with the temperature, moisture content and of course amount of light determine the quality of the soil, in the garden, on the fields, in the greenhouses, winter gardens, on the terrace, flowers beds or in the pots at home. pH meter with a thin electrode is applicable anywhere where pH value of a soil sample should be measured. Due to the thin long tip, penetrating the soil is very easy, and the measurement is immediate. The results indicate whether certain measures should be taken to change a too acidic or too alkalic medium in the soil and to adjust it in correspondence with the plans that are growing or will be growing in the soil. Not all kinds of plants require the same soil. And there is no ideal standard which all the gardeners should strive for. Neutral pH for soil is between 6.5 to 7, but there are many agricultural cultures that need 6 and even 5. A correctly prepared soil sample is sufficient for getting a reliable result and making a conclusion about the soil condition. Electrode should be handled with care and possible not applied in the sample with stones or rock particles, since it may damage the glass. Correct cleaning after measuring procedure and storage allow to apply the same electrode over a longer time period.
THE IMPORTANCE OF THE SOIL PH IN AGRICULTURE
The pH value of the soil is undoubtedly one of the factors that has a decisive influence on the yield of any crop, along with the other more obvious and known factors important for the plants, such as the availability of water or the nutrient content. The matter is that the pH value of a soil may cause that certain nutrients and trace elements essential for a particular crop are present in such a form that are better absorbed by the plant, or vice versa: an inadequate or not properly controlled soil pH value, can cause that nutrients which have initially been available in the soil, or which the farmer has subsequently added by means of fertilization, are present in the form of a chemical compound not absorbable by the plant, and consequently, the plant does not develop optimally. For this reason, as well as because of the inefficient use of expensive fertilizers, the profitability of the farmer can be seriously jeopardized if he does not control the pH of the soil with an accurate pH meter, which allows him making the pertinent corrective decisions in each particular case. There are several known agronomic techniques that allow correcting the pH of the soil and adapting it to the optimal conditions for the crop. It must be taken into account that for each crop there is the most suitable range of the soil pH value, within which it is convenient and recommended to work in order to reach the optimum yield. Although, as a rule, the majority of the agricultural crops yield better in the soils with the pH close to neutral or slightly acid, there are crops that are adapted and especially indicated for more acidic or more basic soils, different from the neutral pH.
PH VALUE MEASUREMENT IN SOIL
The soil pH is a distinctive mark of its acid or base content. The pH of a soil, as in all the other aqueous systems, is affected by natural buffer systems. The determination takes place either in a suspension (extraction procedure) of soil in a neutral salt solution (0.01 N calcium chloride or potassium chloride) - lab measurement method. Here, since the absorbed H + ions are replaced by the CaCl2-ions, the pH measured in such a way is about 0.3-1.0 units below the pH, which is measured in purely aqueous suspensions. However, not all the data in the literature are corrected accordingly.
PRACTICAL EXAMPLE: PH MEASUREMENT IN SOIL WITH A SOIL EXTRACTION SOLUTION - LABORATORY MEASUREMENT METHOD ACCORDING TO DIN 19684 PART 1
Range: between pH 2 to pH 9
Meter: PCE-228
pH electrodes: pH electrode with spherical membrane, refillable or gel-filled, fabric or ceramic diaphragm
Required equipment: 1 electrode stand
1 large-volume beaker (>500 ml),
1 magnetic or glass rod for stirring