PHS-1701 portable pH meter is a digital display PH meter, with LCD digital display, which can display PH and temperature values simultaneously. The instrument applies to the labs in junior college institutions, research institutes, environmental monitoring, industrial and mining enterprises and other departments or field sampling to determine the aqueous solutions' PH values and potential (mV) values. Equipped with ORP electrode, it can measure the solution's ORP (oxidation-reduction potential) value; equipped with the ion specific electrode, it can measure the electrode potential value of the electrode.
Technical Indexes
| Measuring range | pH | 0.00…14.00 |
| mV | -1999…1999 | |
| Temp | -5℃---105℃ | |
| Resolution | pH | 0.01pH |
| mV | 1mV | |
| Temp | 0.1℃ | |
| Electronic unit measurement error | pH | ±0.01pH |
| mV | ±1mV | |
| Temp | ±0.3℃ | |
| pH calibration | 1point, 2 point, or 3 point | |
| Isoelectric point | pH 7.00 | |
| Buffer solution | 8 groups | |
| Power supply | DC6V/20mA ； 4 x AA/LR6 1.5 V or NiMH 1.2 V and chargable | |
| Size/Weight | 230×100×35(mm)/0.4kg | |
| Display | LCD | |
| pH input | BNC，resistor >10e+12Ω | |
| Temp input | RCA(Cinch)，NTC30kΩ | |
| Data storage | Calibration data；198 groups measurement data（99 groups for pH、mV each) | |
| Working condition | Temp | 5...40℃ |
| Relative humidity | 5%...80%(without condensate) | |
| Installation grade | Ⅱ | |
| Pollution grade | 2 | |
| Altitude | <=2000m | |
What‘s pH?
PH is a measure of the hydrogen ion activity in a solution. Pure water that contains an equal balance of positive hydrogen ions (H +) and
negativehydroxide ions (OH -) has a neutral pH.
● Solutions with a higher concentration of hydrogen ions (H +) than pure water are acidic and have a pH less than 7.
● Solutions with a higher concentration of hydroxide ions (OH -) than water are basic (alkaline) and have a pH greater than 7.
Why monitor the pH of water?
