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- Large LCD for easy reading
The pH value and the temperature are displayed on a large LCD. - Auto Power-Off
The "auto power-off" function turns off the unit 20 minutes after the power is turned on.
This conserves battery life if you forget to turn off the unit. - Auto temperature compensation
Once the PHP-31 sensor probe is connected to your SK-620PH, it will perform automatic temperature compensation to produce more accurate pH measurements.
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| Cat. No. | 6400-00 | 6422-00 | |
| Model | SK-620PH | SK-640PH | |
| Measuring range | pH | 0.00 to 14.00pH | 0.00 to 14.00pH |
| °C | 0.0 to 50.0°C | 0.0 to 50.0°C | |
| Accuracy | pH | ±(0.3+1digit)pH at 0 to 2pH ±(0.1+1digit)pH at 2 to 12pH ±(0.4+1digit)pH at 12 to 14pH |
±0.03pH (w/ 640-S sensor) |
| °C | ±0.5°C at 20 to 30 °C ±0.7°C at other than above |
±0.5°C (w/ 640-S sensor) |
|
| Resolution | pH | 0.01pH | 0.01pH |
| °C | 0.1°C | 0.1°C | |
| Elements | pH | Glass electrode | Glass electrode |
| °C | Thermistor | Thermistor | |
| Power requirement | 9VDC 6F22 (006P) battery or AC adaptor (optional) | ||
| Materials | Case : ABS resin Probe :Glass | ||
| Dimensions | (W)72 x (H)182 x (D)31.5mm Probe (PHP-31) Ø12 x (L)135mm Cord : (L) 100mm |
(W)72 x (H)182 x (D)31.5mm Probe (640-S): Ø12 x (L)152mm Cord : (L) 100mm |
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| Weight | Approx. 220g with battery | Approx. 220g with battery | |
| Functions | Auto temperature compensation, Back light, MAX/MIN, Memory, Calibration at three pH points (4.01, 6.86 and 10.01) at 25°C, Auto power-Off | Auto temperature compensation, Back light, MAX/MIN memory, Calibration at three pH points (4.01, 6.86 and 10.01) at 25°C, Auto power-Off | |
| Standard accessories | 1 pc. of PHP-31 Probe, | 1 pc. of 640S-1 Probe, | |
| Instruction manual, One 006P battery, Glass electrode cover, Vinyl cover, Carrying case, Standard liquid(Phthalate solution, Neutral phosphate solution, Carbonate solution) |
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