Communication Device:

1 Sampling cycle: time interval (arbitrarily adjustable from 1 to 9999min) and hourly measurement mode.

2 Calibration cycle: adjustable at any interval any time from 1 to 99 days.

3 Maintenance cycle: 1 time/month.

4 Display: 10-inch color screen, 1024*600, 16.77 million colors

5 Output: RS-232, 4-20mA (optional).

6 Communication protocol: Modbus RTU, new national standard protocol, dynamic control protocol, others

7 Environment requirements: indoor with adjustable temperature, recommended temperature +5～28℃; humidity ≤90% (no condensation).

8 Power supply: AC220±10% V, 50±10% Hz, 5A.

Communication Device:

1 Sampling cycle: time interval (arbitrarily adjustable from 1 to 9999min) and hourly measurement mode.

2 Calibration cycle: adjustable at any interval any time from 1 to 99 days.

3 Maintenance cycle: 1 time/month.

4 Display: 10-inch color screen, 1024*600, 16.77 million colors

5 Output: RS-232, 4-20mA (optional).

6 Communication protocol: Modbus RTU, new national standard protocol, dynamic control protocol, others

7 Environment requirements: indoor with adjustable temperature, recommended temperature +5～28℃; humidity ≤90% (no condensation).

8 Power supply: AC220±10% V, 50±10% Hz, 5A.

Water Temperature Technical Parameters  

1. Measuring principle: temperature sensor

2. Measuring range: -5～60℃

3. Accuracy: ±0.5℃

4. Resolution: 0.1℃

5. MTBF: ≥720h/time

6. Output signal: 4-20mA, RS-485/232

pH Technical Parameters

1. Test principle: glass electrode method

2. Measuring range: 0.00～14.00 pH

3. Repeatability: within ±0.01pH

4. Resolution: 0.01 pH

5. Temperature compensation: automatic temperature compensation function

6. Function: glass electrode damage self-checking function

7. MTBF: ≥720h/time

8. Comparison test with actual water sample: within ±0.1pH

9. Output signal: 4-20mA, RS-485/232

Dissolved Oxygen Technical Parameters

1. Measurement method: membrane electrode method or chemiluminescence method

2. Measuring range: 0.00～20.00mg/L

3. Repeatability error: ±0.3 mg/L

4. Resolution: 0.05mg/L

5. Response time: 90% guarantee rate≤60S

6. Temperature compensation: automatic temperature compensation function

7. Drift: ≤0.3mg/L

8. Function: with electrode self-check function. Membrane electrode method can detect membrane damage and electrolyte leakage.

9. Comparison test with actual water sample: ±0.3 mg/L

10. MTBF: ≥720h/time

11. Output signal: 4-20mA, RS-485/232

Electrical Conductivity Technical Parameters

1. Test principle: electrode method

2. Measuring range: 0～20mS/cm, measuring range can be switched automatically

3. Repeatability error: ±1%

4. Resolution: ≤0.1μS/cm

5. Temperature compensation: automatic temperature compensation function

6. MTBF: ≥720h/time

7. Output signal: 4-20mA, RS-485/232

8. Comparison test with actual water sample: ±10%

9. Drift: ±1%

Turbidity Technical Parameters

1. Test principle: using 90 degree scattering method

2. Measuring range: 0-4000NTU, the range can be automatically switched

3. Repeatability error: ±5%

4. Resolution: 0.01NTU

5. Function: with self-checking function and automatic cleaning function

6. MTBF: ≥720h/time

7. Output signal: 4-20mA, RS-485/232

8. Comparison test with the actual water sample, the relative test error≤10%