PHS-25 precision pH meterPerformance characteristics:

PHS-25 pH meter is a digital display pH meter that uses blue backlight and dual row digital display LCD, which can simultaneously display pH value, temperature value or potential (mV) value. This instrument is suitable for sampling and measuring the pH value and potential (mV) value of aqueous solutions in laboratories of colleges, research institutes, environmental monitoring, industrial and mining enterprises, and other departments. When equipped with an ORP electrode, the ORP (oxidation-reduction potential) value of the solution can be measured, and when equipped with an ion selective electrode, the electrode potential value of the electrode can be measured.

PHS-25 precision pH meterMain technical indicators:

1. Instrument level: 0.1 level

2. Measurement range: pH 0.00~14.00pH;

mV 0～±1800mV

3. Resolution: 0.01pH, 1mV, 0.1 ℃

4. Temperature compensation range: 0-60 ℃;

5. Basic error of electronic unit: pH ± 0.05pH;

mV ±1%（FS）

6. Basic instrument error: ± 0.1pH;

7. Electronic unit input current: not greater than 1 × 10-11A

8. Electronic unit input impedance: not less than 3 × 1011 Ω

9. Repetitive error of electronic unit: pH 0.05pH

mV 5mV

10. Instrument repeatability error: not greater than 0.05pH

11. Electronic unit stability: ± 0.05pH ± 1 word/3h

12. Dimensions: 200 × 210 × 70mm (l × b × h)

13. Weight: 1kg

14. Normal usage conditions:

a) Environmental temperature: (5-50) ℃

b) Relative humidity: ≤ 85%

c) Power supply: AC 220V±10% 50H

d) No significant vibration;

e) There is no external magnetic field interference except for the Earth's magnetic field.