ESTP101 PH meter is a device used for potentiometric pH measurements. pH can be measured using either pH indicators (like phenolphthalein) - 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 meter is nothing else but precise voltmeter, connected to the pH electrode, and scaled in such a way that it displays not the measured potential, but ready pH value.
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pH MEASUREMENT: |
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Range |
-2.000 to 20.000 pH |
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Resolution |
Selectable 0.1, 0.01, 0.001 pH |
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Accuracy |
+ 0.002pH + 1 digit |
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Calibration |
Auto & Manual with 5-Point Calibration |
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Auto Buffer Recognition |
1.680, 4.000, 7.000, 9.200, 12.450 pH (AUTOMATIC) |
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Relative Stability |
+ 0.002 pH/Hour |
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Temp. Compensation |
-5 to 110oC Auto/Manual |
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mV MEASUREMENT: |
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Range |
0 to + 1999.9 mV |
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Resolution |
0.1 mV & 0.01 mV |
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Accuracy |
+ 0.1 mV + 1 digit |
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TEMPERATURE MEASUREMENT: |
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Range |
-5 to 110oC |
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Resolution |
0.1oC |
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Accuracy |
+ 0.1oC |
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Sensor |
Semi-Conductor Type (PT-100 Probe) |
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GENERAL SPECIFICATIONS: |
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Readout |
128x64 dots Graphical LCD Display |
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Power Supply |
230V + 10% 50Hz AC |
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Printer Interface |
External Serial RS232 Dot Matrix Printer Interface |
Accessories
NIST traceable buffer solution (PH 4.0,7.0,10.01 x 500 ml for each bottle)
standard electrode holder
AC/DC adaptor