Salient Features:
① Automatic recognition of standard solution
② One-key restoration (restore to factory settings)
③ Multiple display modes
④ Multiple ultra-bright LED backlights
⑤ High and low point alarms

Technical Parameters:
1. Measuring range: 0.00～14.00pH or -1999～+1999mV
2. Resolution: 0.01pH or 1mV
3. Class: 0.05 class
4. Stability: ±0.03pH/24h
5. Adjustable range during calibration: Zero point ±1.50pH, Slope 70%～130%
6. pH standard solution: 6.86/4.00/9.18   7.00/4.00/10.00
7. Temperature compensation: 0～99.9℃ (automatic or manual)
8. Signal output: 4～20mA (optocoupler isolated output)
9. Control interface: ON/OFF relay contacts
10. Relay load capacity: MAX 220V AC 5A
11. Relay hysteresis: 0.01～3.00pH or 0～300mV freely adjustable
12. Signal output load: ≤500Ω
13. Signal input impedance: ≥1×10¹²Ω
14. Operating voltage: AC220V±10% 50/60Hz
15. Dimensions: 96×96×115mm
16. Panel cutout dimensions: 92×92mm
17. Weight: 0.8Kg
18. Operating conditions: ① Ambient temperature: -5～55℃, no direct sunlight! ② Relative humidity: ≤90%
        ③ No strong magnetic field interference except the Earth's magnetic field