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A ph meter measures the ph of a solution utilizing glass electrodes. The electrode is made of very thin glass that allows h+ ions to pass through it. The meter measures electrical potential and converts this data into a ph reading for a sample.Ph meter is a specific type of voltameter with a very high impedance of input channels highly suitable for potenciometric ph measurements. Voltage produced by the ph electrode is proportional to logartithm of the h+ activity. Ph meter voltameter display is scaled in such a way that the displayed result of measurement is just the ph of the solution. Commercial ph electrodes used in ph meters consist of a h+ selective membrane, and internal and external reference electrodes, usually combined in one housing. Ph can be measured using either ph indicators (like phenolophtaleine) - in form of solution or ph strips - or using potentiometric method. Strips are very useful when all you need is 0.5-1 ph unit accuracy. When you need higher precision, ph meter is the only way to go. In potentiometric methods you measure potential difference between known reference electrode and the measuring ph electrode. The latter depends on the activities of ions you want to measure. This dependence is described by nernst equation, thus once the potential has been measured you can calculate the activity. Ph meters range from simple and inexpensive pen-like devices to complex and expensive laboratory instruments with computer interfaces and several inputs for indicator (ion-sensitive, redox), reference electrodes, and temperature sensors such as thermoresistors or thermocouples. Cheaper models sometimes require that temperature measurements be entered to adjust for the slight variation in ph caused by temperature. Specialty meters and probes are available for use in special applications, harsh environments, etc. Pocket ph meter are readily available today for a few tens of dollars that automatically compensate for temperature. This ph test meter is very easy to use that is again fully accurate and come with affordable range. Different sizes of ph meter that fit in either hand with clear and accurate readings and digitally displaying system are available in the market. High level of resolution, wide mv range with power requirement makes this analytical instrument is suitable for different type of analytical applications. This ph meter eliminates guesswork and allows instant ph readings at critical moments. Universally this scientific laboratory equipment is applied for the measuring the ph measurements of different samples. In cosmetic and in the industry of detergents suitable application this ph meter is done. For the sample tests in the food processing units, water plants and in the soil this ph meter that includes water ph meter, soil ph meter, ph conductivity meter and others are very effective.
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Hanna Instruments ( India ) Pvt Ltd |
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We introduce ourselves as a leading manufacture & supplier of analytical instruments since 1978.Hanna instrument is u s based mnc.We are sure hanna is not a new name to you because every laboratory/in |
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J.H. Associates was established in the year 1992 with the main aim of bringing-in the latest technological laboratory products from all over the globe to the scientific community in india. |
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Digitech Systems & Engineering Pvt Ltd |
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Manufacturer of energy meters for power units and all |
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We manufacture a wide range of high quality instruments for analytical solutions. |
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Manufacturers of custom made industrial and engineering apparatus & chemical process instruments such as spherical vessels, measurement and control equipments, sight glass, couplings, stirrers, pipeline components, valves, heat exchangers, column adaptors, typical units, pressure gauges, rotary film exchangers, rotameters, teflon lined components, laboratory glassware, glass equipments, level indicators and many other scientific & labware instruments. |
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Metal Power Analytical (i) Pvt. Ltd. |
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Manufacturers and marketers of analytical and metallurgical instruments. |
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Jay instruments is an electronics and automation division of jaysynth group. |
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