1. Measurement range: PH -4.00~18.00PH ORP-1999~+1500mV;

2. Resolution: 0.01PH; 1mV;

3. Accuracy: ± 0.05PH; ± 1mV;

4. Stability: ≤ 0.02PH/24h; ≤3mV/24h；

5. PH correction approval range: zero point ± 1.45 PH slope ± 30%;

6. PH standard solution 4.01/6.86/9.18 4.00/7.00/0.01;

7. ORP standard solution, any standard solution;

8. Control range: 0-14.00PH; -1000 to+1000mV;

9. Temperature compensation: 0-99.9 ℃ (pH);

10. Output signal: 4-20mA photoelectric coupling isolation protection output;

11. Control output mode: Two sets of ON/OFF relay output contacts;

12. Relay with load: maximum AC 230V/5A, maximum AC 115V/10A;

13. Current output load: The maximum allowable load is 500 Ω.